| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D000221.5 | SGP/EBBR - EBBR E15 Anemometer Cup Off, Wind Speed Incorrect | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D000225.2 | SGP/EBBR- EBBR E15 Air Temperatures Incorrect | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D010213.3 | SGP/EBBR/E15 - EBBR E15 Wind Speed Iced | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D010413.3 | SGP/EBBR/E15 - E15 EBBR Reference Temperature Incorrect | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D010413.4 | SGP/EBBR/E15 - E15 EBBR Data Incorrect | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| D010413.5 | SGP/EBBR/E15 - E15 EBBR Data Missing | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| D010413.6 | SGP/EBBR/E15 - E15 EBBR Data Incorrect | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| D010413.7 | SGP/EBBR/E15 - E15 EBBR Data Missing | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| D010413.8 | SGP/EBBR/E15 - E15 EBBR Some Soil Temperatures and Heat Flows Incorrect | sgp15ebbrE15.a1, sgp30ebbrE15.a1 |
| D010413.9 | SGP/EBBR/E15 - E15 EBBR Some Soils and Flux Data Incorrect | sgp30ebbrE15.a1 |
| D010416.1 | SGP/EBBR/E15 - E15 EBBR AEM Stuck in Middle | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D010416.2 | SGP/EBBR/E15 - E15 EBBR AEM Replacement | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D010416.3 | SGP/EBBR/E15 - E15 EBBR Battery Voltage Low | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D010416.4 | SGP/EBBR/E15 - E15 EBBR Incorrect Net Radiation | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D011127.28 | SGP EBBR E15 - E15 EBBR Data Incorrect During 6 Month Checks | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| D011207.12 | SGP EBBR E15 - E15 EBBR Battery Voltage Low, Data Incorrect | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| D011218.1 | SGP EBBR E15 - E15 EBBR Data Zeros Incorrect | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| D020129.1 | SGP EBBR E15 - E15 EBBR Recalibration Changeout | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.00, sgp5ebbrE15.a1 |
| D020214.7 | SGP/EBBR/E15 - Data Incorrect During 6 Month Checks | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| D020628.17 | SGP/EBBR/E15 - T/RH Check | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D020628.3 | SGP/EBBR/E15 - 3-month Check | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D020716.13 | SGP/EBBR/E15 - 6 Month Checks | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| D021113.1 | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header | sgp30ebbrE12.b1, sgp30ebbrE13.b1, sgp30ebbrE15.b1, sgp30ebbrE18.b1, sgp30ebbrE19.b1, sgp30ebbrE2.b1, sgp30ebbrE20.b1, sgp30ebbrE22.b1, sgp30ebbrE26.b1, sgp30ebbrE4.b1, sgp30ebbrE7.b1, sgp30ebbrE8.b1, sgp30ebbrE9.b1 |
| D021113.4 | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header | sgp30ebbrE12.a1, sgp30ebbrE13.a1, sgp30ebbrE15.a1, sgp30ebbrE20.a1, sgp30ebbrE22.a1, sgp30ebbrE26.a1, sgp30ebbrE4.a1, sgp30ebbrE7.a1, sgp30ebbrE8.a1, sgp30ebbrE9.a1 |
| D030110.35 | SGP/EBBR/E15 - Data Incorrect during 6 month checks | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| D030115.7 | SGP/EBBR/E15 - REPROCESS: Soil Moisture #1 Offset | sgp30ebbrE15.a1, sgp30ebbrE15.b1 |
| D030115.8 | SGP/EBBR/E15 - Data Mostly Zero Following Logger Restart | sgp15ebbrE15.a0, sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| D030115.9 | SGP/EBBR/E15 - Pressure Low | sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| D030712.18 | SGP/EBBR/E15 - 6 Month Checks | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| D030724.2 | SGP/EBBR/E15 - Wind Direction 10 Degrees Low | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| D030728.2 | SGP/EBBR/E15 - Top Humidity reported as zero in 30 minute data. | sgp30ebbrE15.a1, sgp30ebbrE15.b1 |
| D031031.2 | SGP/EBBR/E15 - Reference Temperature Failed | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| D031031.6 | SGP/EBBR/E15 - Water In Net Radiometer, Surface Fluxes Incorrect | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| D031031.9 | SGP/EBBR/E15 - Soil Temperature #5 Incorrect, Surface Fluxes Incorrect | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1 |
| D031106.1 | SGP/EBBR/E15 - Soil Temperature #5 Incorrect, Surface Fluxes Incorrect | sgp15ebbrE15.b1, sgp30ebbrE15.b1 |
| D031110.7 | SGP/EBBR/E15 - AEM Hung Between Home Positions, Surface Fluxes Incorrect | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D031204.11 | SGP/EBBR/E15 - 6 Month Checks | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D031222.18 | SGP/EBBR/E15 - Net Radiometer Iced Over During Storm | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D031222.19 | SGP/EBBR/E15 - Wind Speed Sensor Frozen By Ice Storm | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D040112.1 | SGP/EBBR/E15 - Wind Direction About 130 Degrees Low | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D040227.1 | SGP/EBBR/E15 - Net Radiometer not level | sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D040304.14 | SGP/EBBR/E15 - Wind Speed Frozen Stopped By Ice | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D040507.1 | SGP/EBBR/E15 - Wind Speed Incorrect | sgp15ebbrE15.b1, sgp30baebbrE15.c1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D041004.4 | SGP/EBBR/E15 - Soil Moisture Coefficients Incorrect | sgp30ebbrE15.b1 |
| D041222.13 | SGP/EBBR/E15 - 6 Month Checks | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D050206.11 | SGP/EBBR/E15 - Wind Speed Frozen Stopped By Ice Storm | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D050207.7 | SGP/EBBR/E15 - Wind Direction Frozen Stopped By Ice Storm | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D050215.18 | SGP/EBBR/E15 - Wind Speed Frozen Stopped By Ice | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D050215.19 | SGP/EBBR/E15 - Wind Direction Frozen Stopped By Ice | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D050324.1 | SGP/EBBR/E15 - Soil Heat Flows Undermeasured, and Latent and Sensible Heat Fluxes Overstimated | sgp30ebbrE15.b1 |
| D050624.2 | SGP/EBBR/E15 - Net Radiation Too Large - Water in Bottom | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D050719.10 | SGP/EBBR/E15 - Improved EBBR CR10 Program | sgp30ebbrE15.b1 |
| D051106.25 | SGP/EBBR/E15 - Average Soil Heat Flux Incorrect | sgp30ebbrE15.b1 |
| D051106.9 | SGP/EBBR/E15 - Soil Set #5 Temperature, Moisture, and Heat Flow Incorrect | sgp15ebbrE15.b1, sgp30ebbrE15.b1 |
| D051111.12 | SGP/EBBR/E15 - metadata corrections | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D051215.3 | SGP/EBBR/E15 - Net Radiation, Sensible and Latent Heat Fluxes Incorrect. | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D060111.10 | SGP/EBBR/E15 - Incorrect Sensible and Latent Heat Fluxes | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D060111.11 | SGP/EBBR/E15 - Reprocess: Sensible and Latent Heat Fluxes, Soil Set #2 Sometimes Incorrect | sgp30ebbrE15.b1 |
| D060501.15 | SGP/EBBR/E15 - Wind Speed Sensor Frozen Stopped | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D080616.4 | SGP/EBBR/E15 - Water in dome | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| D080616.5 | SGP/EBBR/E15 - Soil Heat Flow #4 Incorrect | sgp15ebbrE15.b1, sgp30ebbrE15.b1 |
| D940105.1 | Incorrect readings for pressure sensor | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D940105.4 | SGP/EBBR/E15 - Questionable data due to low voltage at E15 | sgp15ebbrE15.a0, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D941021.13 | SGP/EBBR/E15 - Net Radiometer Hemisphere Changes | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D941021.8 | SGP/EBBR/E15 - Net Radiometer Hemisphere Changes | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D950126.4 | SGP/EBBR/E15 - Frozen Wind Speed Instrument | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D950626.20 | SGP/EBBR/E15 - Battery Voltage Drop, Storage Module Change | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D950626.3 | SGP/EBBR/E15 - Frozen Wind Speed Sensor | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D950816.3 | SGP/EBBR/E15 - AEM Home 15 Values High | sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D950908.1 | SGP/EBBR/E15 - AEM Not Exchanging | sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D950921.2 | SGP/EBBR/E15 - AEM Replaced | sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D951116.4 | SGP/EBBR/E15 - AEM Exchange Stopped in Snow and Freezing Rain | sgp30ebbrE15.a1 |
| D951220.5 | SGP/EBBR/E15 - Annual calibration changeout | sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D960104.4 | SGP/EBBR/E15 - Wind Speed Cups Frozen | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D960119.1 | SGP/EBBR/E15 - Reprocess: Soil Temperature Probe Malfunction | sgp15ebbrE15.a1, sgp30ebbrE15.a1 |
| D960119.2 | SGP/EBBR/E15 - Battery Voltage Drop | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D960508.7 | SGP/EBBR/E15 - 3-month check | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D961122.25 | SGP/EBBR/E15 - EBBR 3 Month Checks - 10 EFs | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D970330.2 | SGP/EBBR/E15 - Wind Speed Cups frozen | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D970703.3 | SGP/EBBR/E15 - Connections Affecting Home Signals | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D971021.6 | SGP/EBBR/E15 - EBBR Biannual Checks | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D980117.14 | SGP/EBBR/E15 - EBBR Frozen Wind Speed | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D980117.24 | SGP/EBBR/E15 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown) | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D980117.29 | SGP/EBBR/E15 - EBBR Net Radiometer Domes Pierced, Water Inside - Data Affected | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D980410.9 | SGP/EBBR/E15 - Wind Speed Sensor Frozen | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| D980416.13 | SGP/EBBR/E15 - 3-Month Check | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D980513.4 | SGP/EBBR/E15 - Pressure Diurnal Fluctuations | sgp30ebbrE15.a1 |
| D980513.5 | SGP/EBBR/E15 - Pressure Too High | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D980513.6 | SGP/EBBR/E15 - Left T/RH Probe Temperature Too Large | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D980529.11 | SGP/EBBR/E15 - Six Month Checks | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D981113.3 | SGP/EBBR/E15 - Aspirator loosened from AEM mount | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D990127.26 | SGP/EBBR/E15 - Wind Direction Data Incorrect (revised) | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| D990127.44 | SGP/EBBR/E15 - Wind Speed Data Incorrect | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| D990127.45 | SGP/EBBR - EBBR E15 Wind Speed Data Incorrect | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| D990127.46 | SGP/EBBR - EBBR E15 Wind Speed Data Incorrect | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| D990311.1 | SGP/EBBR/E15 - Temperatures Incorrect | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/04/1999 | 2215 | 08/10/1999 | 1500 |
| Subject: | SGP/EBBR - EBBR E15 Anemometer Cup Off, Wind Speed Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | An anemometer cup fell off. The following values were therefore incorrect: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/27/1999 | 1530 | 07/27/1999 | 1530 |
| Subject: | SGP/EBBR- EBBR E15 Air Temperatures Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | When the reference temperature sensor was being replaced, the left and
right thermocouple air temperatures and humidity probe temperatures
were incorrect.
Affected data values were:
5 Minute: tref, tair_top, tair_bot, thum_top, thum_bot, vp_top, vp_bot
15 minute: rr_tref, rr_thum_l, rr_thum_r, tair_r, tair_l
30 minute: tref, tair_top, tair_bot, thum_top, thum_bot, vp_top, vp_bot,
bowen, e, h |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/10/2000 | 2130 | 12/12/2000 | 1715 |
| Subject: | SGP/EBBR/E15 - EBBR E15 Wind Speed Iced |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | The anemometer was frozen stopped by freezing rain. Indicated data is incorrect. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/01/2000 | 1730 | 02/05/2000 | 0131 |
| 02/05/2000 | 1500 | 02/06/2000 | 1231 |
| 02/06/2000 | 1430 | 02/08/2000 | 0701 |
| 02/08/2000 | 1500 | 02/10/2000 | 1931 |
| 02/19/2000 | 1700 | 02/20/2000 | 0201 |
| 02/20/2000 | 1530 | 02/21/2000 | 1701 |
| 02/23/2000 | 0300 | 02/23/2000 | 2001 |
| 02/24/2000 | 0200 | 02/24/2000 | 1501 |
| 02/25/2000 | 0030 | 02/27/2000 | 0501 |
| 02/27/2000 | 1430 | 02/29/2000 | 0231 |
| 02/29/2000 | 1630 | 03/01/2000 | 0931 |
| 03/01/2000 | 1430 | 03/04/2000 | 0801 |
| 03/04/2000 | 1430 | 03/07/2000 | 1601 |
| 03/11/2000 | 1530 | 03/12/2000 | 0331 |
| 03/12/2000 | 1430 | 03/16/2000 | 1831 |
| 03/17/2000 | 1800 | 03/21/2000 | 1531 |
| Subject: | SGP/EBBR/E15 - E15 EBBR Reference Temperature Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | The reference temperature was incorrect during the indicated periods. This temperature is used to adjust air temperature measurements; therefore air temperature and resulting sensible and latent heat fluxes and Bowen ratio are incorrect. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/17/2000 | 1700 | 03/17/2000 | 1701 |
| Subject: | SGP/EBBR/E15 - E15 EBBR Data Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| Description: | All of the measurements (except, battery voltage, time_offset, lat, lon, etc.) were incorrect during the installation of a new reference temperature sensor. |
| Measurements: | sgp5ebbrE15.00:
sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/17/2000 | 1600 | 03/17/2000 | 1631 |
| Subject: | SGP/EBBR/E15 - E15 EBBR Data Missing |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| Description: | The data for this period was missing, during replacement of the reference temperature sensor. |
| Measurements: | sgp5ebbrE15.00:
sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/04/2000 | 1530 | 04/04/2000 | 1531 |
| Subject: | SGP/EBBR/E15 - E15 EBBR Data Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| Description: | All of the measurements (except, battery voltage, time_offset, lat, lon, etc.) were incorrect during a logger upgrade. |
| Measurements: | sgp5ebbrE15.00:
sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/04/2000 | 1500 | 04/04/2000 | 1501 |
| Subject: | SGP/EBBR/E15 - E15 EBBR Data Missing |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| Description: | The data for this period was missing, during an upgrade of the data logger. |
| Measurements: | sgp5ebbrE15.00:
sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/17/2000 | 0130 | 03/17/2000 | 0331 |
| Subject: | SGP/EBBR/E15 - E15 EBBR Some Soil Temperatures and Heat Flows Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1 |
| Description: | For an unknown reason, some of the soil temperatures and soil heat flows were incorrect, leading to many of the calculated quantities being incorrect. |
| Measurements: | sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/04/2000 | 1830 | 04/04/2000 | 1831 |
| Subject: | SGP/EBBR/E15 - E15 EBBR Some Soils and Flux Data Incorrect |
| DataStreams: | sgp30ebbrE15.a1 |
| Description: | The soil heat capacity measurements were incorrect for an unknown reason, resulting in incorrect average soil heat flow and latent and sensible heat fluxes. |
| Measurements: | sgp30ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/21/2000 | 0130 | 09/22/2000 | 1331 |
| 09/22/2000 | 2300 | 10/03/2000 | 1531 |
| 12/31/2000 | 1930 | 01/09/2001 | 1701 |
| Subject: | SGP/EBBR/E15 - E15 EBBR AEM Stuck in Middle |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | When the AEM does not complete switching and becomes hung at a mid position, the indicated data measurements are incorrect. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/03/2000 | 1545 | 10/03/2000 | 1815 |
| Subject: | SGP/EBBR/E15 - E15 EBBR AEM Replacement |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | Large home signals occured while the AEM was being replaced; the indicated data measurements are incorrect. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/04/2000 | 1045 | 10/04/2000 | 1316 |
| 10/05/2000 | 0700 | 10/05/2000 | 1601 |
| 10/05/2000 | 1700 | 10/05/2000 | 1901 |
| Subject: | SGP/EBBR/E15 - E15 EBBR Battery Voltage Low |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | When EBBR battery voltage is 10.4 volts or less, the measurements are considered to be incorrect. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/15/2000 | 0730 | 10/17/2000 | 1516 |
| Subject: | SGP/EBBR/E15 - E15 EBBR Incorrect Net Radiation |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | Incorrect net radiation resulted in incorrect sensible and latent heat fluxes. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/17/2001 | 1850 | 04/17/2001 | 1945 |
| 10/02/2001 | 1604 | 10/02/2001 | 1742 |
| Subject: | SGP EBBR E15 - E15 EBBR Data Incorrect During 6 Month Checks |
| DataStreams: | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| Description: | The data was incorrect during the 6 month checks. |
| Measurements: | sgp15ebbrE15.b1:
sgp5ebbrE15.a1:
sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/27/2001 | 1735 | 06/26/2001 | 1501 |
| Subject: | SGP EBBR E15 - E15 EBBR Battery Voltage Low, Data Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| Description: | When the battery voltage is 10.4 volts or below, all selected data should be considered to be incorrect. See the battery voltage in the 15 minute data to determine times of incorrect data. |
| Measurements: | sgp15ebbrE15.b1:
sgp5ebbrE15.a1:
sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/11/2001 | 1930 | 10/11/2001 | 1931 |
| Subject: | SGP EBBR E15 - E15 EBBR Data Zeros Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| Description: | The data was all zeros after a logger restart for 5 , 15, and 30 minute periods. |
| Measurements: | sgp15ebbrE15.b1:
sgp5ebbrE15.a1:
sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/11/2001 | 1508 | 10/11/2001 | 1931 |
| Subject: | SGP EBBR E15 - E15 EBBR Recalibration Changeout |
| DataStreams: | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.00, sgp5ebbrE15.a1 |
| Description: | During the indicated period the EBBR unit was being changed out with a recalibrated unit. All data is incorrect or missing. Unit #14 was removed; #6 was installed. |
| Measurements: | sgp5ebbrE15.00:
sgp15ebbrE15.b1:
sgp5ebbrE15.a1:
sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/13/2001 | 1700 | 11/13/2001 | 1801 |
| Subject: | SGP/EBBR/E15 - Data Incorrect During 6 Month Checks |
| DataStreams: | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| Description: | The data was incorrect during the 6 month checks. |
| Measurements: | sgp15ebbrE15.b1:
sgp5ebbrE15.a1:
sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/07/1994 | 1650 | 11/07/1994 | 1830 |
| Subject: | SGP/EBBR/E15 - T/RH Check |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | During the month of November 1994, site operations personnel conducted
field comparisons of the temperature and relative humidity sensors in the
EBBRs and the HMI31 portable T/RH meter (with the removable probe). As is
reflected in the home signal output, the automatic exchange mechanism was
disabled in order to conduct the checks.
Measurements were taken every 5 minutes, for a half hour each in the
aspirated radiation shields (the HMI31 was inserted into the EBBR aspirated
radiation shield to provide the same aspiration as the EBBR sensors
received). Measurements of aspirator flow were also recorded. This
information was provided to the mentor. The mentor then compared the field
checks with the data recorded by the EBBRs.
The periods of data and data fields that are incorrect because of the checks
are listed below. Times are those at which the data are reported.
Data Fields
5 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
vp_top, vp_bot
15 minute: rr_thum_r, rr_thum_l, mv_hum_r, mv_hum_l, tair_r, tair_l
30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
vp_top, vp_bot, bowen, e, h
5 minute: 1650, 1655, 1700, 1705, 1710, 1715, 1720, 1725, 1730,
1735, 1740, 1745, 1750, 1755, 1800, 1805
15 minute: 1700, 1715, 1730, 1745, 1800, 1815
30 minute: 1700, 1730, 1800, 1830
(EDITOR'S NOTE: The following analysis refers to all EBBRs installed in Nov 1994)
Results of the T/RH comparisons:
The combined accuracy of the HMI31 and EBBR temperature sensors
(thermocouples or PRTDs) is +/- 0.4 degrees C. The combined accuracy of the
HMI31 and EBBR RH sensors is +/- 4% for RH less than 80%, and +/- 6% for RH
greater than 80%. The combined accuracy for each pair of EBBR sensors of
the same type is essentially the same as the quantities stated above.
All of the pairs of EBBR sensors show differences that fall within the
stated combined accuracies. Although this sounds wonderful, a few of the
differences are close to the combined accuracy, which, because of the small
differences in temperature being measured (normally smaller than the
magnitude of the combined accuracy) could lead to some incorrect estimation
of sensible and latent heat flux. However, unless there would be substantial
differences of calibration slope of two sensors in a pair, the switching of
height of the sensors every 15 minutes by the automatic exchange mechanism
will remove the offset between the sensors.
The comparisons between the EBBR sensors and the HMI31 T/RH meter showed
much larger differences. The range of differences were: -2.4 to 0.0 degrees
for the thermocouples, -2.1 to 0.1 degrees for the RH probe PRTDs, and -6.6 to
6.7 percent for the RH sensors. Six Thermocouples indicated differences from
the HMI31 greater than the combined accuracy. Seven PRTDs indicated
differences from the HMI31 greater than the combined accuracy. Four RH
sensors indicated differences from the HMI31 greater than the combined
accuracy. The temperature differences (for both thermocouples and PRTDs)
were nearly all of one sign; the HMI31 indicated the greater temperature,
which may suggest a bias in the HMI31 temperature measurement, even though
a dozen differences of +/- 0.2 degrees were measured. Four differences of
zero and only one positive difference (out of 40) were measured. Thirteen of
the 20 RH differences were positive (HMI31 indicating the lower
RH), with the differences near the level of the combined accuracies being
approximately 50% positive and 50% negative. It does not appear that the
HMI31 has a RH bias.
Plots of EBBR sensor/HMI31 differences as a function of time from the
installation of the individual sensors (a range of 10 to 30 months in the
field) shows no obvious pattern of sensor drift with time. This is encouraging. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/10/1995 | 1800 | 10/10/1995 | 2100 |
| Subject: | SGP/EBBR/E15 - 3-month Check |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | During EBBR 3 month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during this period, at least, do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/14/2002 | 1505 | 05/14/2002 | 1546 |
| Subject: | SGP/EBBR/E15 - 6 Month Checks |
| DataStreams: | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| Description: | The indicated measurements were incorrect during the 6 month checks. |
| Measurements: | sgp15ebbrE15.b1:
sgp5ebbrE15.a1:
sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/01/2001 | 0000 | 06/18/2003 | 2359 |
| Subject: | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR |
| DataStreams: | sgp30ebbrE12.b1, sgp30ebbrE13.b1, sgp30ebbrE15.b1, sgp30ebbrE18.b1, sgp30ebbrE19.b1, sgp30ebbrE2.b1, sgp30ebbrE20.b1, sgp30ebbrE22.b1, sgp30ebbrE26.b1, sgp30ebbrE4.b1, sgp30ebbrE7.b1, sgp30ebbrE8.b1, sgp30ebbrE9.b1 |
| Description: | The units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in the EBBR 30 minute netcdf header have been incorrect from the beginning of processing the data into netcdf files. The correct units are MJ/m^3/C. This does not affect the data quality. |
| Measurements: | sgp30ebbrE8.b1:
sgp30ebbrE4.b1:
sgp30ebbrE9.b1:
sgp30ebbrE18.b1:
sgp30ebbrE26.b1:
sgp30ebbrE13.b1:
sgp30ebbrE7.b1:
sgp30ebbrE12.b1:
sgp30ebbrE19.b1:
sgp30ebbrE2.b1:
sgp30ebbrE22.b1:
sgp30ebbrE20.b1:
sgp30ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/01/1993 | 0000 | 06/18/2003 | 2359 |
| Subject: | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR |
| DataStreams: | sgp30ebbrE12.a1, sgp30ebbrE13.a1, sgp30ebbrE15.a1, sgp30ebbrE20.a1, sgp30ebbrE22.a1, sgp30ebbrE26.a1, sgp30ebbrE4.a1, sgp30ebbrE7.a1, sgp30ebbrE8.a1, sgp30ebbrE9.a1 |
| Description: | The units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in the EBBR 30 minute netcdf header have been incorrect from the beginning of processing the data into netcdf files. The correct units are MJ/m^3/C. This does not affect the data quality. (NOTE: The actual begin date of some of these data streams is as early as 7/4/93. This DQR applies to all 30m EBBR data.) |
| Measurements: | sgp30ebbrE4.a1:
sgp30ebbrE22.a1:
sgp30ebbrE12.a1:
sgp30ebbrE7.a1:
sgp30ebbrE20.a1:
sgp30ebbrE15.a1:
sgp30ebbrE9.a1:
sgp30ebbrE26.a1:
sgp30ebbrE8.a1:
sgp30ebbrE13.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/12/2002 | 1710 | 11/12/2002 | 1740 |
| Subject: | SGP/EBBR/E15 - Data Incorrect during 6 month checks |
| DataStreams: | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| Description: | Some of the measurements are incorrect during the 6 month checks. |
| Measurements: | sgp15ebbrE15.b1:
sgp5ebbrE15.a1:
sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/11/2001 | 1920 | 07/09/2002 | 1522 |
| Subject: | SGP/EBBR/E15 - REPROCESS: Soil Moisture #1 Offset |
| DataStreams: | sgp30ebbrE15.a1, sgp30ebbrE15.b1 |
| Description: | The wrong offset (9.5264) was used in the calibration coefficients for Soil Moisture Probe #1. The correct offset is 0.95264. Sensible and Latent Heat Flux measurements are not significantly affected. |
| Measurements: | sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/22/2002 | 1630 | 07/22/2002 | 1659 |
| Subject: | SGP/EBBR/E15 - Data Mostly Zero Following Logger Restart |
| DataStreams: | sgp15ebbrE15.a0, sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| Description: | Most of the measurements were zero, which normally happens after a datalogger restart. The restart on 07/22/02 occurred after a pressure sensor replacement. |
| Measurements: | sgp5ebbrE15.a1:
sgp30ebbrE15.b1:
sgp15ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/10/2002 | 1300 | 12/23/2002 | 1600 |
| Subject: | SGP/EBBR/E15 - Pressure Low |
| DataStreams: | sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| Description: | The pressure measurements were too low during this period, as much as 40 mb too low. This occurred after a restart of the EBBR CR10 datalogger, for unknown reasons. |
| Measurements: | sgp5ebbrE15.a1:
sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/29/2003 | 1540 | 04/29/2003 | 1655 |
| Subject: | SGP/EBBR/E15 - 6 Month Checks |
| DataStreams: | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
| Measurements: | sgp15ebbrE15.b1:
sgp5ebbrE15.a1:
sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/11/2001 | 1930 | 08/05/2003 | 1630 |
| Subject: | SGP/EBBR/E15 - Wind Direction 10 Degrees Low |
| DataStreams: | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| Description: | The wind direction at E15 EBBR was 10 degrees low for the period (since installation of the EBBR unit on 10/11/01). The wind direction sensor was apparently aligned to magnetic north instead of true north at installation. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.a1:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/19/2003 | 1900 | 06/19/2003 | 1900 |
| Subject: | SGP/EBBR/E15 - Top Humidity reported as zero in 30 minute data. |
| DataStreams: | sgp30ebbrE15.a1, sgp30ebbrE15.b1 |
| Description: | The top relative humidity was reported as zero in the 30 minute data. This is an apparent misreporting by the CR10 datalogger or is caused by a communications problem in accessing the data from the datalogger. It is very infrequently seen; it's actual cause is unknown. No other data was affected. |
| Measurements: | sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/11/2003 | 2230 | 10/12/2003 | 2330 |
| Subject: | SGP/EBBR/E15 - Reference Temperature Failed |
| DataStreams: | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| Description: | The reference temperature failed, making air temperatures, e, h, and Bowen ratio incorrect. |
| Measurements: | sgp15ebbrE15.b1:
sgp5ebbrE15.a1:
sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/29/2003 | 1630 | 09/30/2003 | 1600 |
| Subject: | SGP/EBBR/E15 - Water In Net Radiometer, Surface Fluxes Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1, sgp5ebbrE15.a1 |
| Description: | The net radiometer top dome was punctured by migrating birds. This alone does not cause incorrect net radiation measurements. However, when it subsequently rains, water collects in the bottom dome, causing the net radiation measurements to be too large during the day and too small at night. |
| Measurements: | sgp15ebbrE15.b1:
sgp5ebbrE15.a1:
sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/11/2003 | 2230 | 10/12/2003 | 2359 |
| Subject: | SGP/EBBR/E15 - Soil Temperature #5 Incorrect, Surface Fluxes Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp15ebbrE15.b1, sgp30ebbrE15.a1, sgp30ebbrE15.b1 |
| Description: | Soil Temperature #5 was incorrect. This affected many measurements, including sensible and latent heat fluxes. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/13/2003 | 0000 | 10/14/2003 | 1830 |
| Subject: | SGP/EBBR/E15 - Soil Temperature #5 Incorrect, Surface Fluxes Incorrect |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1 |
| Description: | Soil Temperature #5 was incorrect. This affected many measurements, including sensible and latent heat fluxes. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/05/2003 | 1400 | 11/11/2003 | 1800 |
| Subject: | SGP/EBBR/E15 - AEM Hung Between Home Positions, Surface Fluxes Incorrect |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | The AEM was hung inbetween home positions. Therefore the sensible and latent heat fluxes are also incorrect. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/14/2003 | 1700 | 10/14/2003 | 1730 |
| Subject: | SGP/EBBR/E15 - 6 Month Checks |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/13/2003 | 1500 | 12/15/2003 | 0000 |
| Subject: | SGP/EBBR/E15 - Net Radiometer Iced Over During Storm |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | The net radiometer was covered with ice from a storm. Net radiation values are incorrect, and are sometimes even negative during the daytime. Sensible and latent heat fluxes are therefore incorrect. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/12/2003 | 1955 | 12/13/2003 | 1940 |
| Subject: | SGP/EBBR/E15 - Wind Speed Sensor Frozen By Ice Storm |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | The wind speed sensor was frozen stopped by ice from a storm. The wind speed and residual wind speed measurements are incorrect. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/25/2003 | 2150 | 01/20/2004 | 2030 |
| Subject: | SGP/EBBR/E15 - Wind Direction About 130 Degrees Low |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | The EBBR wind direction sensor developed an approximately -130 degree offset. The pin holding the vane to the shaft had fallen out. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/26/2004 | 0000 | 03/02/2004 | 1705 |
| Subject: | SGP/EBBR/E15 - Net Radiometer not level |
| DataStreams: | sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | The EBBR net radiometer at E15 was suspected to be off of level
because the daily peak net radiation was recorded later than it
was recorded by the SIRS.
Site Ops found the EBBR net radiometer at E15 was significantly
off of level (1/2 bubble tipped to the north). Adjustment of
the level improved the comparison of peak time with the
co-located SIRS.
There was no significant effect on the sensible and latent heat
fluxes. |
| Measurements: | sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/01/2004 | 1810 | 02/02/2004 | 2040 |
| 02/04/2004 | 2240 | 02/05/2004 | 1840 |
| 02/09/2004 | 1020 | 02/09/2004 | 1430 |
| Subject: | SGP/EBBR/E15 - Wind Speed Frozen Stopped By Ice |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | An ice storm froze the wind speed sensor to a stopped condition. The wind speed and residual wind speed measurements are incorrect. This sensor failure does not affect the sensible and latent heat fluxes. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/23/2004 | 2130 | 04/27/2004 | 1630 |
| Subject: | SGP/EBBR/E15 - Wind Speed Incorrect |
| DataStreams: | sgp15ebbrE15.b1, sgp30baebbrE15.c1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | The cups were broken off of the wind speed sensor by hail on 4/23/04. The cups were replaced on 4/27/04. Wind speed measurements were near zero and incorrect during the indicated period. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp30baebbrE15.c1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/11/2001 | 1500 | 09/28/2004 | 1509 |
| Subject: | SGP/EBBR/E15 - Soil Moisture Coefficients Incorrect |
| DataStreams: | sgp30ebbrE15.b1 |
| Description: | The soil Moisture coefficients used for E15 were incorrect from the time of installation of the system in program version 8. On 9 July 02 parameter 4 (an offset value) of program step 136 was changed from 9.5264 to the correct value 0.95264 (this error had been made by the vendor). The error masked the real problem (wrong soil type) and after 9 July 02 resulted in very low soil moisture measurements. The coefficients used were for coarse sand. On 28 Sep 04 I visited the E15 site and found the soil type a fine sandy clay or fine sandy loam. I changed the coefficients at 1509 GMT to those for a very fine sandy loam; this produced reasonable soil moistures for the soil type. The old coefficients in parameters 4 through 9 for step 136 of the program were: 0.95264, -6.7859, 36.224, -58.619, 25.073, 4.2278 The new coefficients are: 10.241, -27.943, 49.523, -12.648, -52.643, 38.054 |
| Measurements: | sgp30ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/26/2004 | 1630 | 10/26/2004 | 1700 |
| Subject: | SGP/EBBR/E15 - 6 Month Checks |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/04/2005 | 1010 | 01/05/2005 | 0200 |
| Subject: | SGP/EBBR/E15 - Wind Speed Frozen Stopped By Ice Storm |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | An ice storm froze the wind speed sensor to a stopped condition. The wind speed and residual wind speed measurements are incorrect. This sensor failure does not affect the sensible and latent heat fluxes. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/04/2005 | 1605 | 01/05/2005 | 0200 |
| Subject: | SGP/EBBR/E15 - Wind Direction Frozen Stopped By Ice Storm |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | The wind direction sensor was frozen stopped by ice from a storm. The wind direction, sigma_wd, and residual wind speed measurements are incorrect. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/12/2005 | 0030 | 01/12/2005 | 1545 |
| Subject: | SGP/EBBR/E15 - Wind Speed Frozen Stopped By Ice |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | An ice storm froze the wind speed sensor to a stopped condition. The wind speed and residual wind speed measurements are incorrect. This sensor failure does not affect the sensible and latent heat fluxes. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/12/2005 | 0030 | 01/12/2005 | 0930 |
| Subject: | SGP/EBBR/E15 - Wind Direction Frozen Stopped By Ice |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | The wind direction sensor was frozen stopped by ice from a storm. The wind direction, sigma_wd, and residual wind speed measurements are incorrect. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/08/2004 | 1830 | 03/01/2005 | 1630 |
| Subject: | SGP/EBBR/E15 - Soil Heat Flows Undermeasured, and Latent and Sensible Heat Fluxes |
| DataStreams: | sgp30ebbrE15.b1 |
| Description: | Use of the wrong soil type soil moisture coefficients caused soil moisture to be greatly undermeasured (a typical wrong value was 4% instead of the correct 17%), soil heat flows to be undermeasured, and sensible and latent heat fluxes to be overestimated. Soil heat flow plate outputs were undermeasured by up to 10%, change of energy storage was undermeasured by up to 80% and total soil heat flow was undermeasured by up to 50% as a result. This would result in approximately a 5% overestimation of both sensible and latent heat fluxes. |
| Measurements: | sgp30ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/13/2005 | 0800 | 05/24/2005 | 1700 |
| Subject: | SGP/EBBR/E15 - Net Radiation Too Large - Water in Bottom |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | Water in the bottom dome of the net radiometer made the measurements incorrectly large. Sensible and latent heat fluxes were therefore incorrect. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/01/2001 | 0000 | 03/29/2005 | 1900 |
| Subject: | SGP/EBBR/E15 - Improved EBBR CR10 Program |
| DataStreams: | sgp30ebbrE15.b1 |
| Description: | Effective 20050329.1900, the EBBR.E15 CR10 program was revised to improve the quality of the primary measurements as follows: 1) An RMS procedure is used to determine max and min limits of acceptable soil heat flow. This is applied to the individual soil sets. Measurements outside the limits are rejected and the measurements within the limits are used to calculate the average soil heat flow. 2) Max and min limits are used to determine incorrect values of net radiation, sensible heat flux (h), latent heat flux (e), and automatic exchange mechanism (AEM) signal. If AEM signal is outside the limits, h and e are set to 999s. If net radiation is outside the limits, h and e are set to 999s. If h or e are outside the limits, h and e are set to 999s. Virtually no incorrect soil measurement will affect the primary measurements of h and e. By setting h and e to 999s, it can be easily seen that the primary variables are incorrect; no other interpretation is possible. Prior to 20050329, the improved CR10 program was NOT in effect. DQRs have been submitted for known instances of incorrect soil measurements which affected the quality of the primary measurements of h and e. Note: the DQR begin date is the begin date of the sgp30ebbrE15.b1 data stream. The earlier version of the CR10 program was also used on previous EBBR datastream names (e.g. sgp30ebbrE15.a1). |
| Measurements: | sgp30ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/01/2005 | 1800 | 03/29/2005 | 1900 |
| Subject: | SGP/EBBR/E15 - Average Soil Heat Flux Incorrect |
| DataStreams: | sgp30ebbrE15.b1 |
| Description: | A typo in the version 9 EBBR program caused average soil heat flow to be zero, resulting in both sensible and latent heat fluxes being approximately 20 watts per meter squared too large during the middle of the day. |
| Measurements: | sgp30ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/15/2005 | 2130 | 07/19/2005 | 1700 |
| Subject: | SGP/EBBR/E15 - Soil Set #5 Temperature, Moisture, and Heat Flow Incorrect |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1 |
| Description: | Rodents chewed the cables on all three soil set #5 sensors, making the measurements incorrect. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/13/2003 | 0000 | 07/22/2005 | 2359 |
| Subject: | SGP/EBBR/E15 - metadata corrections |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | On 20050723, a series of metadata corrections and additions were completed. These metadata changes apply to all EBBR.E15 data collected by ARM back to the installation of the instrument in September 1992. Please see the current metadata for correct information. These changes do not affect data values or quality. The changes are summarized below: 1) Update of "sensor location" information 2) Addition of installation dates for the systems 3) Correction of soil type 4) Correction of soil moisture units (from "by volume" to "gravimetric") |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/30/2005 | 0000 | 11/08/2005 | 1815 |
| Subject: | SGP/EBBR/E15 - Net Radiation, Sensible and Latent Heat Fluxes Incorrect. |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | The top dome of the net radiometer was broken, resulting in net radiations that were too small, and thus sensible and latent heat fluxes that were too small. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/10/2006 | 1330 | 01/17/2006 | 1730 |
| Subject: | SGP/EBBR/E15 - Incorrect Sensible and Latent Heat Fluxes |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | Incorrect gradient measurements and sensible and latent heat fluxes resulted from the AEM not exchanging. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/27/2005 | 0000 | 12/18/2005 | 1200 |
| Subject: | SGP/EBBR/E15 - Reprocess: Sensible and Latent Heat Fluxes, Soil Set #2 Sometimes Incorrect |
| DataStreams: | sgp30ebbrE15.b1 |
| Description: | Spikes in soil set #2 sometimes caused sensible and latent heat fluxes to be incorrect. There is no electronic connection between the soil set #2 sensors, so it is suspected that there was a problem in the soil set #2 cable bundle. A power outage ensued, after which the soil set #2 problem did not re-occur. |
| Measurements: | sgp30ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/22/2006 | 1300 | 02/22/2006 | 1530 |
| Subject: | SGP/EBBR/E15 - Wind Speed Sensor Frozen Stopped |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | Freezing rain froze the wind speed sensor to a stopped condition during the period. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/11/2008 | 1500 | 06/20/2008 | 1500 |
| Subject: | SGP/EBBR/E15 - Water in dome |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1, sgp5ebbrE15.b1 |
| Description: | There was water in the bottom dome of the net radiometer. Net radiation, and sensible and latent heat fluxes were incorrect during the period. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
sgp5ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/01/2008 | 0030 | 06/15/2008 | 1500 |
| Subject: | SGP/EBBR/E15 - Soil Heat Flow #4 Incorrect |
| DataStreams: | sgp15ebbrE15.b1, sgp30ebbrE15.b1 |
| Description: | Soil heat flux #4 produced too large a soil heat flow at times, resulting in it exceeding the qc check limit and causing sensible and latent heat fluxes to be incorrect. |
| Measurements: | sgp15ebbrE15.b1:
sgp30ebbrE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/11/1993 | 1100 | 12/01/1993 | 1830 |
| Subject: | Incorrect readings for pressure sensor |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | ARM PROBLEM IDENTIFICATION FORM (PIF)
PIF No. P940105.1
Subject: SGP/Ebbr - Incorrect readings for pressure sensor at E15
Submitted By: David R. Cook
Organization: Argonne National Laboratory
Date Submitted: December 13, 1993
How may we contact you?
e-mail: cook@anler.er.anl.gov
phone: (708) 252-5840
FAX: (708) 252-9792
Submitter's Priority: 3
[Critical-1 Very Important-2 Important-3 Inconvenient-4 Interesting-5]
Where was this Problem Identified: DA
[Site Data System-SDS Experiment Center-EC]
[Archive-A At Field Instrument-FI ]
[During Data Analyis-DA Other- List Location]
Does this PIF result in a Software Change Request? No
Where: [ SDS, EC, or A ]
Type: [Development-1 Problem-2 Enhancement-3]
List Programs/Documents Affected:
Configuration Identification:
Does problem impact data values or cause data loss? Data values.
which platform(s): EBBR, E15, Ringwood, OK
Specify (or estimate) begin and end dates
Begin Date 7/11/93
End Date 12/01/93 Time 1830 GMT
Apparent cause of data loss, if known:
SUGGESTED CAUSES: Calibration Drift.
[human error, component failure, temperature, lightning ]
[foreign matter, power loss, software failure, ]
[communications failure, modification difficulites, specify other]
Problem Description/Change Description.
o For Instrument Problems ONLY,
Identify MODE of Operation: Normal
o Give a brief explanation with details, attach examples and any supporting
information. This should include a description of analysis leading to
identification of problem and, if known, recommended action.
Beginning July 11, 1993, the atmospheric pressure sensor at the E15
EBBR began indicating approximately 0.2 KPa lower than the colocated SMOS.
Between July 31 and August 22, 1993 the difference increased to between
0.25 and 0.30 KPa. After August 22, the difference increased to 0.3 to
0.35 KPa and remained that way until December 1, 1993. A comparison of the
EBBR pressure sensor with the portable standard on December 1, 1993
indicated that the EBBR sensor was 0.04 KPa higher than the standard; this
is excellent agreement considering that the uncertainty of the EBBR sensor
calibration is 0.15 KPa. The consistent bias in EBBR pressure between July 11
and December 1 can be easily detected in comparisons with SMOS pressure data.
No EBBR data other than pressure was affected by the pressure problem;
calculations of specific heat at constant pressure (which includes the term
1/(p-vp)) times other terms (including p-.378*vp) result in no error to the
third decimal point at least in the resulting Bowen Ratio. For example;
assume a common vapor pressure (vp) of 2.0 kPa, a common atmospheric pressure
of 97.0 kPa, and a corrupted atmospheric pressure of 96.65 kPa at the extreme.
Uncorrupted Corrupted
(97.0-.378*2.0)/(97.0-2.0) = 1.0131 (96.65-.378*2.0)/(96.65-2.0) = 1.0131
1.0131/1.0131 = 1.0000 There is no effect on the Bowen Ratio as a
result of the corruption.
Therefore, no correction to the quantities calculated using pressure is
needed. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/12/1993 | 0300 | 11/15/1993 | 1830 |
| Subject: | SGP/EBBR/E15 - Questionable data due to low voltage at E15 |
| DataStreams: | sgp15ebbrE15.a0, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | On November 11, 1993 at 0300 GMT the voltage level of the battery for the EBBR at Ringwood (E15) dropped to too low a level for most of the sensors to perform properly. By 0700 GMT virtually all sensors were not indicating properly. This condition continued through 1830 GMT on November 15, 1993. No data from this EBBR should be considered valid during the period indicated, since the quality of data from all sensors is questionable. |
| Measurements: | sgp15ebbrE15.a0:
sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/26/1994 | 1530 | 10/11/1994 | 1910 |
| Subject: | SGP/EBBR/E15 - Net Radiometer Hemisphere Changes |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | The upper hemisphere of the net radiometer at the site was punctured allowing water to collect in the lower (and sometimes upper) section of the sensor. The punctures are most likely the result of migratory birds (a problem that we have experienced almost every year here at ANL also). The punctures (and water in some net radiometers) did not result in obvious invalidation of the data. Whether there is water in the lower hemisphere or not, a small puncture of the upper hemisphere would not have a major effect on the net radiation measurement. Significant amounts of water in the lower hemisphere should have a major effect on nighttime measurements particularly, although that effect is hard to detect in the data. The date when the puncture occurred is approximate - but is certainly no more than two weeks before the hemisphere was replaced. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/11/1994 | 1915 | 10/11/1994 | 1930 |
| Subject: | SGP/EBBR/E15 - Net Radiometer Hemisphere Changes |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | Incorrect data during hemisphere change. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/31/1994 | 2140 | 01/01/1995 | 1730 |
| Subject: | SGP/EBBR/E15 - Frozen Wind Speed Instrument |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | On December 31, 1994 EBBR wind speed instrument froze in place from icing. Wind speeds increased sufficiently on January 1, 1995 to break the anemometer free. The wind direction instrument was not affected. The times and fields that are incorrect are shown below. 5 minute: wind_s, res_ws 12/31 2140 GMT - 1/1 1705 GMT 15 minute: wind_s 12/31 2145 GMT - 1/1 1715 GMT 30 minute: wind_s, res_ws 12/31 2200 GMT - 1/1 1730 GMT |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/06/1995 | 1645 | 06/06/1995 | 1830 |
| Subject: | SGP/EBBR/E15 - Battery Voltage Drop, Storage Module Change |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | For a short period on June 6, 1995 at E15, Ringwood, OK, two events resulted in a loss of data: replacement of the storage module and a low battery condition. The low battery condition apparently affected only the 1815 GMT data output. All data during this period is missing (1645-1800 GMT) of incorrect (1815-1830). |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/07/1995 | 0145 | 03/07/1995 | 1725 |
| Subject: | SGP/EBBR/E15 - Frozen Wind Speed Sensor |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | On March 7, 1995 freezing rain stopped the cups of the EBBR wind speed instrument at Ringwood, OK (E15). All 5, 15, and 30 minute data values indicated below are incorrect for the period indicated. 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/23/1995 | 0000 | 08/16/1995 | 2359 |
| Subject: | SGP/EBBR/E15 - AEM Home 15 Values High |
| DataStreams: | sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | Beginning on June 23, 1995, the home 15 value indicated greater than 70 at times. This indicates that the home 15 and 30 outputs are somehow being electronically added in the AEM. Home 15 values above 70 cause a data quality message to be output in the site operations log as the stated acceptable range for home 15 is 35 to 70. However, no data is incorrect as a result of this condition. No replacement AEM is available and site operations was not able to diagnose the problem. At present, data quality is not jeopardized. I will submit another DQR or addendum when successful repair or replacement of the AEM is accomplished. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/27/1995 | 1615 | 09/14/1995 | 1600 |
| Subject: | SGP/EBBR/E15 - AEM Not Exchanging |
| DataStreams: | sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | On August 27, 1995 at approximately 1615 GMT the upper sprocket shaft of the AEM
broke in two, causing the AEM to stop exchanging. The home signal values
then remained at around 22 for both home_15 and Home_30. On August 28 site
operations personnel removed the fuse (to prevent exchange) with the left
aspirator in the down position. The home signal values remained around
-2.3 after that. The AEM will remain in this condition until a replacement
is available.
Therefore, the calculations of Bowen ratio, latent heat flux, and sensible heat
flux are incorrect for all times after August 27, 1995 at 1615 GMT. The data
fields listed below are incorrect after this time:
5 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
vp_top, vp_bot
30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top,
hum_bot, vp_top, vp_bot, Bowen, e, h
It is not possible to reliably calculate the Bowen ratio, e, and h using the
15 minute data. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/27/1995 | 1615 | 09/14/1995 | 1630 |
| Subject: | SGP/EBBR/E15 - AEM Replaced |
| DataStreams: | sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | Please see DQR P950908.1, where this problem was first documented.
On August 27, 1995 at approximately 1615 GMT the upper sprocket shaft of the AEM
broke in two, causing the AEM to stop exchanging. The home signal values
then remained at around 22 for both home_15 and Home_30. On August 28 site
operations personnel removed the fuse (to prevent exchange) with the left
aspirator in the down position. The home signal values remained around
-2.3 after that. On 14 September 1995, site operations personnel replaced
the AEM (serial numbers unknown) and it has operated correctly since then.
The calculations of Bowen ratio, latent heat flux, and sensible heat
flux are incorrect for all times during the period listed above. The data
fields listed below are incorrect:
5 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
vp_top, vp_bot
30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top,
hum_bot, vp_top, vp_bot, Bowen, e, h
It is not possible to reliably calculate the Bowen ratio, e, and h using the
15 minute data. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/11/1995 | 0115 | 11/15/1995 | 2359 |
| Subject: | SGP/EBBR/E15 - AEM Exchange Stopped in Snow and Freezing Rain |
| DataStreams: | sgp30ebbrE15.a1 |
| Description: | On the night of November 10-11, a north-south line from south central Kansas through south central Oklahoma received snow and freezing rain and experienced below freezing temperatures. This caused the EBBR automatic exchange mechanism (AEM) to stop exchanging temporarily. Note that temperatures, relative humidities, and vapor pressures are not affected; these are correct as measured, but the height at which the measurements occurred must be determined from the home signal value. |
| Measurements: | sgp30ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/14/1995 | 1650 | 12/14/1995 | 2100 |
| Subject: | SGP/EBBR/E15 - Annual calibration changeout |
| DataStreams: | sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | On December 14, 1995 the changeout for annual calibration occurred at E15, Ringwood, OK. Between 1650 and 2050 GMT no data was remotely collected. Furthermore, 5 minute data for 2050 GMT is incorrect, 15 minute data for 2045 GMT is incorrect, and 30 minute data for 2100 GMT is incorrect. A rather large jump in soil moisture appears in the data after the installation was completed (the bags holding the probes were soaked with water before installation). Soil measurements indicated greater than ambient soil moisture until a rain on late 18 December saturated the soil; after this period the probes reflected actual soil moisture conditions. The larger than normal soil moistures have little impact on the small soil heat flux during this time of year, and thus no significant affect on computed sensible and latent heat fluxes. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/18/1995 | 1845 | 12/19/1995 | 1755 |
| Subject: | SGP/EBBR/E15 - Wind Speed Cups Frozen |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | Freezing rain, snow, and below freezing conditions during 18-19 January 1995 caused the wind speed sensor cups to freeze in a stopped state at E15, Ringwood, OK on 18 January 1995. When temperatures rose to above freezing on 19 January, the ice thawed and the cups turned freely again. Measurements affected by the stalled wind speed sensor include: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/20/1995 | 1600 | 01/16/1996 | 2030 |
| Subject: | SGP/EBBR/E15 - Reprocess: Soil Temperature Probe Malfunction |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1 |
| Description: | Malfunction of soil temperature probe #3 at 157, Ringwood, OK resulted in incorrect data values for 7 fields for the period of time listed above. The soil temperature value from probe #3 went offscale, resulting in a zero value for the soil energy storage term calculated from that probe and thus no contribution to the total soil heat flux for soils set 4 and the same for average soil heat flux. This led to incorrect sensible and latent heat flux values. The probe may have become disconnected during the 20 December site operations preventative maintenance visit. However, it also had rodent chew damage and so was removed and replaced. The fields that are incorrect are: 30 minute: ts3, ces3, g3, ave_shf, e, h 15 minute: rr_ts3. Soil temperature probe #3 was replaced at 2030 GMT on 16 January 1996. The old S/N was 95043, the new S/N is 93018. Sensible and latent heat fluxes can be recomputed by averaging the soil heat flux from the four sets of functioning soil probes; use the following equations: ave_shf = (g1 + g2 + g4 + g5)/4 e = -(q +ave_shf)/(1 + bowen) h = e * bowen, where g is total soil heat flow, q is net radiation, and bowen is Bowen Ratio. |
| Measurements: | sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/21/1995 | 0630 | 12/22/1995 | 1445 |
| 12/22/1995 | 2230 | 12/23/1995 | 1445 |
| 12/24/1995 | 0245 | 12/24/1995 | 1445 |
| 12/25/1995 | 0330 | 12/25/1995 | 1515 |
| 12/26/1995 | 0230 | 12/26/1995 | 1445 |
| 12/27/1995 | 0215 | 12/27/1995 | 1445 |
| 12/28/1995 | 0000 | 12/29/1995 | 1700 |
| 12/29/1995 | 1800 | 12/29/1995 | 1815 |
| 12/29/1995 | 1930 | 01/03/1996 | 1430 |
| 01/04/1996 | 0530 | 01/04/1996 | 1430 |
| 01/04/1996 | 1500 | 01/04/1996 | 1645 |
| 01/04/1996 | 1900 | 01/05/1996 | 1730 |
| 01/05/1996 | 1930 | 01/05/1996 | 2000 |
| 01/05/1996 | 2045 | 01/06/1996 | 1445 |
| 01/07/1996 | 0500 | 01/07/1996 | 1500 |
| 01/08/1996 | 0300 | 01/08/1996 | 1445 |
| 01/09/1996 | 0745 | 01/09/1996 | 1415 |
| 01/10/1996 | 0730 | 01/10/1996 | 1615 |
| 01/11/1996 | 0130 | 01/11/1996 | 1430 |
| 01/12/1996 | 0230 | 01/12/1996 | 1445 |
| 01/13/1996 | 0100 | 01/13/1996 | 1445 |
| 01/14/1996 | 0030 | 01/14/1996 | 1445 |
| 01/15/1996 | 0045 | 01/15/1996 | 1600 |
| 01/15/1996 | 2330 | 01/16/1996 | 2015 |
| Subject: | SGP/EBBR/E15 - Battery Voltage Drop |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | From the installation of the changeout unit at E15 on 15 December 1995, the battery exhibited a slow decline in voltage. However, after a day of the AEM not operating, site operations restarted the AEM on 20 December 1995 and the battery condition declined more rapidly, such that the solar panel was not able to keep the battery voltage up (greater than 11 V DC) for nighttime conditions, even after a cloudless day. Battery voltage first dropped below 11 volts at 0635 GMT on 21 December. I requested that the solar panel voltage regulator be tested. On 16 January 1996, site operations found that the fuse in the solar panel voltage regulator was loose. After the fuse was repositioned, the battery voltage increased almost immediately to 13.5 volts and has been good since. All data for the periods above should be considered incorrect; many sensors require at least 11 volts DC power and the performance of the CR10 data logger can not be trusted at less than 11 volts. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/23/1996 | 1610 | 04/23/1996 | 1703 |
| Subject: | SGP/EBBR/E15 - 3-month check |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | During EBBR 3-month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during this period, at least, do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data. The period of incorrect data for the EBBR is listed above; data times affected do not include the beginning time and do include the ending time (data files are denoted by the end time). |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/05/1996 | 1658 | 11/05/1996 | 1732 |
| Subject: | SGP/EBBR/E15 - EBBR 3 Month Checks - 10 EFs |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | During EBBR 3 month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during these periods do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate correct gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data. Incorrect 5, 15 minute and half hour data occurs for periods indicated. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/18/1995 | 1845 | 12/19/1995 | 1755 |
| Subject: | SGP/EBBR/E15 - Wind Speed Cups frozen |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | Freezing rain, snow, and below freezing conditions during 18-19 January 1995 caused the wind speed sensor cups to freeze in a stopped state at E15, Ringwood, OK on 18 January 1995. When temperatures rose to above freezing on 19 January, the ice thawed and the cups turned freely again. Measurements affected by the stalled wind speed sensor include: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/15/1997 | 2245 | 04/22/1997 | 1830 |
| Subject: | SGP/EBBR/E15 - Connections Affecting Home Signals |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | For most of the period above at E15, Ringwood, OK, home signals were very large, resulting in incorrect data. On April 22, 1997, site operations found some loose connections on the J-panels that were causing the problem. This problem affected a wide range of measurements and calculated values, rendering much of the data, including the sensible and latent heat fluxes as incorrect. Only careful examination of the data would allow some to be used as is and other quantities to be recalculated. I would request that anyone needing this data contact me for information on it's quality. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/22/1997 | 1525 | 04/22/1997 | 1546 |
| Subject: | SGP/EBBR/E15 - EBBR Biannual Checks |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | During EBBR 3 month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during these periods do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate correct gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data. Incorrect 5, 15 minute and half hour data occurs for periods indicated. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/21/1997 | 0440 | 12/21/1997 | 1820 |
| 01/04/1998 | 0525 | 01/05/1998 | 1830 |
| 01/09/1998 | 2150 | 01/12/1998 | 0330 |
| Subject: | SGP/EBBR/E15 - EBBR Frozen Wind Speed |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | Wind speed cups were frozen during the indicated time periods. All 5, 15, and 30 minute data values indicated are incorrect for the periods listed. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/21/1997 | 0745 | 12/21/1997 | 1715 |
| 01/04/1998 | 0630 | 01/05/1998 | 1830 |
| Subject: | SGP/EBBR/E15 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown) |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | The EBBR AEM stopped exchanging because of icing at during this time period. The calculations of Bowen ratio, latent heat flux, and sensible heat flux are incorrect for the time period indicated. The other measurements listed are also incorrect for those times: |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/16/1997 | 1600 | 12/29/1997 | 1730 |
| Subject: | SGP/EBBR/E15 - EBBR Net Radiometer Domes Pierced, Water Inside - Data Affected |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | The upper dome of the EBBR net radiometers was punctured. After the puncture, water collected in the top and/or bottom dome. The water was removed and the dome was replaced during PM visits. In some cases, the puncture and water resulted in incorrect data. Comparison with net radiation values from surrounding EBBR sites and the SIRS is neccesary to determine if the EBBR net radiation data are correct or incorrect. It is often difficult to tell from the data when the punctures occurred, but they would have existed for no more than 2 weeks, since the domes are checked during each two-weekly PM visit. Incorrect net radiation data results in the latent heat flux and sensible heat flux also being incorrect. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/14/1998 | 0915 | 01/14/1998 | 1920 |
| Subject: | SGP/EBBR/E15 - Wind Speed Sensor Frozen |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| Description: | The wind speed sensor was frozen during the period. Data values that were incorrect are: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws |
| Measurements: | sgp5ebbrE15.00:
sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/07/1997 | 1750 | 10/07/1997 | 1832 |
| Subject: | SGP/EBBR/E15 - 3-Month Check |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | During EBBR 3 month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during these periods do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate correct gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data. Incorrect 5, 15 minute and half hour data occurs for the period above. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/03/1998 | 0000 | 04/21/1998 | 1515 |
| Subject: | SGP/EBBR/E15 - Pressure Diurnal Fluctuations |
| DataStreams: | sgp30ebbrE15.a1 |
| Description: | During this period the barometric pressure exhibited increasingly larger, and unatural, diurnal fluctuations. This has been observed at other sites previously. The sensor was replaced on April 21. The diurnal fluctuations had only a minor effect on the calculated fluxes of latent and sensible heat; the fluxes are not incorrect as a result of the problem. |
| Measurements: | sgp30ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/21/1998 | 1530 | 04/28/1998 | 1530 |
| Subject: | SGP/EBBR/E15 - Pressure Too High |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | During this period the barometric pressure was consistently much greater than the true pressure, hanging around 113 kPa all of the time. The defective sensor was replaced on April 28. The calculated fluxes of latent and sensible heat are incorrect during the period. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/12/1998 | 0930 | 05/01/1998 | 1530 |
| Subject: | SGP/EBBR/E15 - Left T/RH Probe Temperature Too Large |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | Beginning in February, the temperature of the left T/RH probe reported too high a value at some times. The frequency of the problem increased with time until 28 April at 1520 GMT, when a defective probe was installed; the latter probe temperature indicated very high values. This continued until 1 May at 1530 GMT when a working probe was installed. Times of incorrect humidity probe temperatures can be determined by comparing 5 or 30 minute values of air temperature and humidity probe temperature; at these times the calculated bowen ratio, and the fluxes of latent and sensible heat are incorrect. The incorrect variables were: 5 minute: thum_top, thum_bot, vp_top, vp_bot 15 minute: rr_thum_l 30 minute: thum_top, thum_bot, vp_top, vp_bot, bowen, e, h |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/05/1998 | 1459 | 05/05/1998 | 1530 |
| Subject: | SGP/EBBR/E15 - Six Month Checks |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | During EBBR 6 month checks (formally called 3 month checks) the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during these periods do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate correct gradients. Checks performed just before or after the AEM is disabled also lead to some incorrect data. Incorrect 5, 15 minute and half hour data occurs for the period above. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/05/1998 | 1200 | 11/05/1998 | 1800 |
| Subject: | SGP/EBBR/E15 - Aspirator loosened from AEM mount |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | The left aspirator was loosened from the AEM mount. Thus all gradients of T/RH/VP and sensible and latent heat fluxes for the period are incorrect. T/RH/VP measurements from the left probe are incorrect only through 1745 GMT. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/08/1999 | 0005 | 01/08/1999 | 0900 |
| Subject: | SGP/EBBR/E15 - Wind Direction Data Incorrect (revised) |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | The wind direction sensor was iced stopped by freezing rain, resulting in the following values being incorrect: 5 minute: res_ws, wind_d, sigma_wd 15 minute: mv_wind_d 30 minute: res_ws, wind_d, sigma_wd |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/20/1998 | 2135 | 12/25/1998 | 1730 |
| 01/01/1999 | 1620 | 01/02/1999 | 2000 |
| 01/07/1999 | 2215 | 01/09/1999 | 0130 |
| Subject: | SGP/EBBR/E15 - Wind Speed Data Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| Description: | The wind speed sensor was iced stopped by freezing rain, resulting in the following values being incorrect: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws, |
| Measurements: | sgp5ebbrE15.00:
sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/01/1999 | 1620 | 01/02/1999 | 2000 |
| Subject: | SGP/EBBR - EBBR E15 Wind Speed Data Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| Description: | The wind speed sensor was iced stopped by freezing rain, resulting in the following values being incorrect: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws, |
| Measurements: | sgp5ebbrE15.00:
sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/07/1999 | 2215 | 01/09/1999 | 0130 |
| Subject: | SGP/EBBR - EBBR E15 Wind Speed Data Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.00, sgp5ebbrE15.a0 |
| Description: | The wind speed sensor was iced stopped by freezing rain, resulting in the following values being incorrect: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws, |
| Measurements: | sgp5ebbrE15.00:
sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/02/1999 | 0400 | 02/23/1999 | 1500 |
| Subject: | SGP/EBBR/E15 - Temperatures Incorrect |
| DataStreams: | sgp15ebbrE15.a1, sgp30ebbrE15.a1, sgp5ebbrE15.a0 |
| Description: | Poor contact of the reference temperature probe leads to the J-panel or multiplexer caused frequent offscale and incorrect values of the reference temperature. All other temperature measurements (air, soil, and humidity probe) depend on the reference temperature for a correction. Therefore all temperature measurements are frequently offscale and incorrect during the specified period. The data clearly shows the offscale times. |
| Measurements: | sgp5ebbrE15.a0:
sgp30ebbrE15.a1:
sgp15ebbrE15.a1:
|