DQR ID | Subject | Data Streams Affected |
---|---|---|
D001107.2 | NSA/C1 data loss due to cut fiber optic cable | nsamettwrC1.a1, nsaorgC1.a1, nsapwsC1.a0 |
D011119.2 | NSA/METTWR/C1 - Met Tower Data Incorrect During Calibrations/Changeouts | nsamettwrC1.a1, nsamettwrC1.b1 |
D020402.2 | NSA/METTWR/C1 - C1 SPURIOUS INFORMATION IN DATA HEADER | nsamettwrC1.b1 |
D020402.3 | NSA/METTWR/C1 - C1 WIND SPEED DATA QUESTIONABLE | nsamettwrC1.a1, nsamettwrC1.b1 |
D020402.4 | NSA/METTWR/C1 - C1 WIND DIRECTION DATA SUSPECT | nsamettwrC1.a1, nsamettwrC1.b1 |
D020424.1 | NSA/METTWRC1 - METTWRCQ DATA REPORTED AS -9999 | nsamettwrC1.a1, nsamettwrC1.b1, nsaorgC1.a1, nsaorgC1.b1, nsapwsC1.a1, nsapwsC1.b1 |
D020424.2 | NSA/METTWRC1 - METTWRC1 NO DATA COLLECTED FROM TOWER | nsamettwrC1.a1, nsamettwrC1.b1, nsaorgC1.a1, nsaorgC1.b1, nsapwsC1.a1, nsapwsC1.b1 |
D020610.2 | NSA/METTWR/C1 - Wind Speed data intermittently bad | nsamettwrC1.a1, nsamettwrC1.b1 |
D020611.1 | NSA/METTIPTWR/C2 - Data missing due to Power Failure | nsametC2.00, nsamettiptwrC2.a1, nsamettiptwrC2.b1 |
D021205.1 | NSA/BMET/C2 - NSA/METTIPTOWER/C2 - C2 MET DATA MISSING | nsamettiptwrC2.a1, nsamettiptwrC2.b1 |
D030411.4 | NSA/C2 - Missing met, pws, snodep data due to comm error | nsamettiptwrC2.a1, nsamettiptwrC2.b1, nsapwsC2.a1, nsapwsC2.b1, nsasnodepC2.a1 |
D030528.5 | NSA/METTWR/C1 - C1/METTWR PRESSURE DATA MISSING AND INCORRECT | nsamettwrC1.a1, nsamettwrC1.b1 |
D040722.2 | NSA/METTWR/C1 - Chilled Mirror transmit logic board chipset unsuited for Arctic temperatures | nsamettwr4hC1.b1 |
D040722.3 | NSA/METTWR/C2 - Chilled Mirror grounding and timing issues | nsamettwr2hC2.b1 |
D040728.1 | NSA/METTWR/C1 - CMH Dew Point and RH data Incorrect | nsamettwr4hC1.b1 |
D041011.2 | NSA/METTWR/C1 - 20m Temperature/RH Sensor Failing | nsamettwr4hC1.b1 |
D041101.1 | NSA/METTWR/C1 - Instrument problem, Frosting/Condensation | nsamettwr4hC1.b1 |
D041112.1 | NSA/METTWR/C2 - Instrument problem | nsamettwr2hC2.b1 |
D041214.1 | NSA/METTWR/C1 - All 10m level Data Missing | nsamettwr4hC1.b1 |
D050124.2 | NSA/METTWR/C1 - CMH data intermittently poor | nsamettwr4hC1.b1 |
D050527.2 | NSA/METTWR/C1 - Incorrect Maximum for Precip Values | nsamettwr4hC1.b1 |
D050527.3 | NSA/METTWR/C2 - Incorrect Maximum for Precip Values | nsamettwr2hC2.b1 |
D050727.1 | NSA/METTWR/C1 - CMH mirror dirty | nsamettwr4hC1.b1 |
D050920.5 | NSA/METTWR/C1 - CMH Data Missing | nsamettwr4hC1.b1 |
D051011.1 | NSA/METTWR/C1 - 2m wind Direction Sensor Failed | nsamettwr4hC1.b1 |
D051025.2 | NSA/METTWR/C1 - Data 1-minute behind | nsamettwr4hC1.b1 |
D051101.4 | NSA/METTWR/C1 - Reprocess: Wind direction data incorrect | nsamettwr4hC1.b1 |
D060223.3 | NSA/METTWR/C2 - CMH Data incorrect | nsamettwr2hC2.b1 |
D060223.4 | NSA/METTWR/C2 - PWS data incorrect | nsamettwr2hC2.b1 |
D060303.2 | NSA/METTWR/C1 - CMH temp inaccurate | nsamettwr4hC1.b1 |
D060323.1 | NSA/METTWR/C1 - 10m Wind Speed Low | nsamettwr4hC1.b1 |
D060323.2 | NSA/METTWR/C1 - 10m Wind Speed Intermittently Low | nsamettwr4hC1.b1 |
D060323.3 | NSA/METTWR/C1 - 40m Wind Speeds Intermittently Low | nsamettwr4hC1.b1 |
D060426.2 | NSA/METTWR/C2 - CMH Data Suspect | nsamettwr2hC2.b1 |
D060426.6 | NSA/METTWR/C1 - CMH Data Suspect | nsamettwr4hC1.b1 |
D060526.3 | NSA/METTWR/C1 - Wind direction measurements suspect | nsamettwr4hC1.b1 |
D060817.4 | NSA/METTWR/C1 - Reprocess: Barometric Data Changed from hPa to kPa | nsamettwr4hC1.b1 |
D060818.1 | NSA/METTWR/C2 - Reprocess: Barometric Data Changed from hPa to kPa | nsamettwr2hC2.b1 |
D060913.2 | NSA/METTWR/C2 - CMH data missing and/or incorrect during maintenance. | nsamettwr2hC2.b1 |
D060913.3 | NSA/METTWR/C2 - PWS data missing/incorrect due to maintenance. | nsamettwr2hC2.b1 |
D060913.4 | NSA/METTWR/C2 - Met data incorrect due to tower being lowered for maintenance. | nsamettwr2hC2.b1 |
D061003.1 | NSA/METTWR/C1 - All data from 10m Level Missing | nsamettwr4hC1.b1 |
D061023.1 | NSA/METTWR/C1 - 10m level loss of power | nsamettwr4hC1.b1 |
D061025.1 | NSA/METTWR/C1 - 2m T/RH probe aspirator fan failed | nsamettwr4hC1.b1 |
D061213.1 | NSA/METTWR/C1 - CMH Sensor Calibrated Incorrectly | nsamettwr4hC1.b1 |
D061213.2 | NSA/METTWR/C1 - 40m wind sensor heater failure | nsamettwr4hC1.b1 |
D070226.1 | NSA/METTWR/C1 - 40m Wind Direction Data Suspect | nsamettwr4hC1.b1 |
D070413.1 | NSA/METTWR/C1 - PWS Data Questionable | nsamettwr4hC1.b1 |
D070529.1 | NSA/METTWR/C1 - 20m RH Data Questionable | nsamettwr4hC1.b1 |
D080325.1 | NSA/METTWR/C1 - Intermittent missing data | nsamettwr4hC1.b1 |
D080326.2 | NSA/METTWR/C1 - 2m Wind Direction Sensor Freezing | nsamettwr4hC1.b1 |
D080408.2 | NSA/METTWR/C1 - CMH Intake Fan Failure | nsamettwr4hC1.b1 |
D080611.1 | NSA/METTWR/C1 - 2m Datalogger Failed | nsamettwr4hC1.b1 |
D080612.1 | NSA/METTWR/C1 - CMH required Calibration | nsamettwr4hC1.b1 |
D080731.1 | NSA/METTWR/C1 - 2m level data incorrect | nsamettwr4hC1.b1 |
D981102.1 | NSA/TOWER - Mislabeled tower sensors | nsametC1.00, nsamettwrC1.a1 |
D991116.1 | NSA/METTOWER - Questionable NSA Met-tower wind data | nsametC1.00, nsamettwrC1.a1 |
D991116.2 | NSA/METTOWER - Questionable NSA Met-tower wind data | nsametC1.00, nsamettwrC1.a1 |
D991129.1 | NSA/METOWER - Reprocess: Incorrect NSA wind direction minima and maxima | nsametC1.00, nsamettwrC1.a1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/14/2000 | 0000 | 04/06/2000 | 2359 |
Subject: | NSA/C1 data loss due to cut fiber optic cable |
DataStreams: | nsamettwrC1.a1, nsaorgC1.a1, nsapwsC1.a0 |
Description: | The fiber optic line connecting the MET TWR to the data collection facility was accidentally cut during snow removal. Data are unrecoverable. |
Measurements: | nsamettwrC1.a1:
nsapwsC1.a0:
nsaorgC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/2001 | 2300 | 10/13/2001 | 2301 |
Subject: | NSA/METTWR/C1 - Met Tower Data Incorrect During Calibrations/Changeouts |
DataStreams: | nsamettwrC1.a1, nsamettwrC1.b1 |
Description: | Met Tower Data was incorrect during this period while sensor changeouts and calibrations were accomplished. |
Measurements: | nsamettwrC1.a1:
nsamettwrC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0000 | 10/08/2001 | 2359 |
Subject: | NSA/METTWR/C1 - C1 SPURIOUS INFORMATION IN DATA HEADER |
DataStreams: | nsamettwrC1.b1 |
Description: | There is an attribute for read_timeout_count that should not be included. The affected prtion of the header is: read_timeout_count:details = '0 = no error, 1 = error' User should disregard this attribute information in the header. |
Measurements: | nsamettwrC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/25/2001 | 0000 | 10/13/2001 | 2301 |
Subject: | NSA/METTWR/C1 - C1 WIND SPEED DATA QUESTIONABLE |
DataStreams: | nsamettwrC1.a1, nsamettwrC1.b1 |
Description: | The anemometers located at all 4 levels (2m, 10m, 20m, and 40m) are heated anemometers. The thermistors controlling the amount of power applied to the cups of the anemometers failed. This caused too much power to be sent to the heating elements. The cups bubbled and, in some cases, completely melted through. |
Measurements: | nsamettwrC1.a1:
nsamettwrC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/25/2001 | 0000 | 10/13/2001 | 2301 |
Subject: | NSA/METTWR/C1 - C1 WIND DIRECTION DATA SUSPECT |
DataStreams: | nsamettwrC1.a1, nsamettwrC1.b1 |
Description: | The wind direction sensor at the 10m level and 20m level became frozen. The senor at the 10m level became frozen on July 25 2001. The date that the 20m level became frozen is unknown but occurred after the 10m level became frozen. Both sensors froze in such a way as to consistently report wind direction values out of the south. |
Measurements: | nsamettwrC1.a1:
nsamettwrC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/04/2002 | 1006 | 02/04/2002 | 1022 |
02/11/2002 | 2100 | 02/21/2002 | 1929 |
Subject: | NSA/METTWRC1 - METTWRCQ DATA REPORTED AS -9999 |
DataStreams: | nsamettwrC1.a1, nsamettwrC1.b1, nsaorgC1.a1, nsaorgC1.b1, nsapwsC1.a1, nsapwsC1.b1 |
Description: | Due to local power outages caused by winter storms, the Bridgeview collection program became corrupted. All tower data and associated instruments on the tower reported as -9999. |
Measurements: | nsamettwrC1.a1:
nsapwsC1.a1:
nsaorgC1.b1:
nsamettwrC1.b1:
nsaorgC1.a1:
nsapwsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/04/2002 | 1023 | 02/11/2002 | 2059 |
02/21/2002 | 1930 | 02/21/2002 | 2002 |
Subject: | NSA/METTWRC1 - METTWRC1 NO DATA COLLECTED FROM TOWER |
DataStreams: | nsamettwrC1.a1, nsamettwrC1.b1, nsaorgC1.a1, nsaorgC1.b1, nsapwsC1.a1, nsapwsC1.b1 |
Description: | Power outage caused fatal errors in the Bridgeview collection program. No data was ingested from the tower and sensors located on the tower. |
Measurements: | nsamettwrC1.a1:
nsapwsC1.a1:
nsaorgC1.b1:
nsamettwrC1.b1:
nsaorgC1.a1:
nsapwsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/28/2002 | 1530 | 09/18/2002 | 1915 |
Subject: | NSA/METTWR/C1 - Wind Speed data intermittently bad |
DataStreams: | nsamettwrC1.a1, nsamettwrC1.b1 |
Description: | Wind speed at 20m level icing up and wind speed values are intermittently 0 m/s, lower than other sensors and good at times. Heater failure on sensor that prevents icing. |
Measurements: | nsamettwrC1.a1:
nsamettwrC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/05/2002 | 1227 | 06/06/2002 | 2100 |
Subject: | NSA/METTIPTWR/C2 - Data missing due to Power Failure |
DataStreams: | nsametC2.00, nsamettiptwrC2.a1, nsamettiptwrC2.b1 |
Description: | No data were collected due to a power failure. |
Measurements: | nsametC2.00:
nsamettiptwrC2.b1:
nsamettiptwrC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/22/2002 | 0029 | 11/21/2002 | 1935 |
Subject: | NSA/BMET/C2 - NSA/METTIPTOWER/C2 - C2 MET DATA MISSING |
DataStreams: | nsamettiptwrC2.a1, nsamettiptwrC2.b1 |
Description: | Due to unknown wiring differences and pin changes by Vaisala to their Wind Speed and Direction sensors, a power feedback into the QLI data collector occurred. This caused an overload which shut the QLI data collector down. Once trouble shooting pinpointed the power feedback, wiring diagrams were created and the differences were found. Wiring was changed to prevent and remove the power feedback. |
Measurements: | nsamettiptwrC2.b1:
nsamettiptwrC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/25/2002 | 1430 | 03/26/2003 | 2229 |
Subject: | NSA/C2 - Missing met, pws, snodep data due to comm error |
DataStreams: | nsamettiptwrC2.a1, nsamettiptwrC2.b1, nsapwsC2.a1, nsapwsC2.b1, nsasnodepC2.a1 |
Description: | An error in the communication sub-routine of the Bridgeview collection software occurred resulting in data loss from the Snow Depth sensor, Present Weather Sensor and the Barometer. |
Measurements: | nsasnodepC2.a1:
nsapwsC2.a1:
nsamettiptwrC2.b1:
nsamettiptwrC2.a1:
nsapwsC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/21/2003 | 0501 | 05/28/2003 | 1659 |
Subject: | NSA/METTWR/C1 - C1/METTWR PRESSURE DATA MISSING AND INCORRECT |
DataStreams: | nsamettwrC1.a1, nsamettwrC1.b1 |
Description: | Starting at 0501 UTC on 05/21, pressure readings frequently are out of tolerance. The read timeout value had changed from 250 ms to 150 ms. Changed the read time out back to 250 ms. Unknown as to how read timeout values changed. |
Measurements: | nsamettwrC1.a1:
nsamettwrC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2003 | 0000 | 04/23/2004 | 1858 |
Subject: | NSA/METTWR/C1 - Chilled Mirror transmit logic board chipset unsuited for Arctic |
DataStreams: | nsamettwr4hC1.b1 |
Description: | Data missing due to problems with manufacturer's transmit logic board chipset. They were generic chips not rated for Arctic temperatures. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/06/2003 | 1719 | 07/14/2004 | 1500 |
Subject: | NSA/METTWR/C2 - Chilled Mirror grounding and timing issues |
DataStreams: | nsamettwr2hC2.b1 |
Description: | From beginning of data stream, the chilled mirror data was intermittent at best. Problems with grounding and timing issues between logging instruments caused data to be incorrect and at times missing. |
Measurements: | nsamettwr2hC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/21/2004 | 1500 | 08/03/2004 | 2300 |
Subject: | NSA/METTWR/C1 - CMH Dew Point and RH data Incorrect |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The Chilled Mirror Dew Point reported negative dew point values. This caused the RH to be much lower than reality also. Compared to the 2m level the RH and dew point from the CMH are incorrect. Mirror was dirty, it was removed, cleaned and recalibrated. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/19/2004 | 1500 | 09/08/2004 | 2321 |
Subject: | NSA/METTWR/C1 - 20m Temperature/RH Sensor Failing |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The 20m temperature and RH sensor began reading high on 20040719. Aspirator fan failure caused a portion of the high reading. New fan failed to correct for all errors. Sensor replaced on 20040908 with recently calibrated sensor. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/23/2004 | 0245 | 11/02/2004 | 2325 |
Subject: | NSA/METTWR/C1 - Instrument problem, Frosting/Condensation |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The 2m T & RH values were not in very good agreement with the CMH data or the other tower levels. A failed aspirator fan caused the readings to be incorrect. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/11/2004 | 2017 | 11/12/2004 | 2246 |
Subject: | NSA/METTWR/C2 - Instrument problem |
DataStreams: | nsamettwr2hC2.b1 |
Description: | CMH and PWS stopped reporting. Communication cable found to be broken. |
Measurements: | nsamettwr2hC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/13/2004 | 2002 | 04/26/2005 | 1902 |
Subject: | NSA/METTWR/C1 - All 10m level Data Missing |
DataStreams: | nsamettwr4hC1.b1 |
Description: | After prolonged power outage and many power spikes during the outage all data from the 10m level are missing. Blown fuse on the power supply was replaced once the temperatures warmed enough to allow the lowering of the tower carriages. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/10/2005 | 2213 | 01/20/2005 | 2100 |
Subject: | NSA/METTWR/C1 - CMH data intermittently poor |
DataStreams: | nsamettwr4hC1.b1 |
Description: | CMH aspirator fan intermittently failed causing higher than actual temperature and dew point readings. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/31/2003 | 0000 | 05/26/2005 | 1014 |
Subject: | NSA/METTWR/C1 - Incorrect Maximum for Precip Values |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The max values for cumulative rain sum of 99 mm and the rain rate of 999 mm/hr are incorrect. In communication with the manufacturer it has been found that the manual was in error. The actual max values of the cumulative rain sum is 99.99 mm and the rain rate is 999.99 mm/hr. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/06/2003 | 0000 | 05/26/2005 | 1014 |
Subject: | NSA/METTWR/C2 - Incorrect Maximum for Precip Values |
DataStreams: | nsamettwr2hC2.b1 |
Description: | The max values for cumulative rain sum of 99 mm and the rain rate of 999 mm/hr are incorrect. In communication with the manufacturer it has been found that the manual was in error. The actual max values of the cumulative rain sum is 99.99 mm and the rain rate is 999.99 mm/hr. |
Measurements: | nsamettwr2hC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/28/2005 | 0630 | 07/19/2005 | 1934 |
Subject: | NSA/METTWR/C1 - CMH mirror dirty |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The CMH mirror was in need of cleaning. The data is suspect from 05/28/05 through 07/04/05 as intermittently poor readings occurred. After 07/04/05 the data was incorrect as the mirror was excessively dirty. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/19/2005 | 1416 | 09/21/2005 | 2203 |
Subject: | NSA/METTWR/C1 - CMH Data Missing |
DataStreams: | nsamettwr4hC1.b1 |
Description: | Data from CMH was missing due to a corroded RS-232 9-Pin connector. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/2005 | 1620 | 10/11/2005 | 0012 |
Subject: | NSA/METTWR/C1 - 2m wind Direction Sensor Failed |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The 2m cup wind direction flat lined at 236 degrees. Sensor failed. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/31/2003 | 0000 | 09/14/2005 | 1420 |
Subject: | NSA/METTWR/C1 - Data 1-minute behind |
DataStreams: | nsamettwr4hC1.b1 |
Description: | Data from the Barometer, Chilled Mirror Hygrometer and the Present Weather Sensor were one-minute behind due to timing problems collecting data from the Serial Data Multiplexer that handled these sensors. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/31/2003 | 0000 | 10/20/2005 | 1900 |
Subject: | NSA/METTWR/C1 - Reprocess: Wind direction data incorrect |
DataStreams: | nsamettwr4hC1.b1 |
Description: | Wind direction data is off by 30 degrees for all wind sensors. The 40-m tower was misaligned to true north. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/19/2006 | 1405 | 02/20/2006 | 1107 |
02/21/2006 | 0619 | 02/21/2006 | 2255 |
Subject: | NSA/METTWR/C2 - CMH Data incorrect |
DataStreams: | nsamettwr2hC2.b1 |
Description: | CMH data was incorrect due to blockage of intake by heavy, wet snow during blizzard conditions. |
Measurements: | nsamettwr2hC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/21/2006 | 1113 | 02/21/2006 | 2359 |
Subject: | NSA/METTWR/C2 - PWS data incorrect |
DataStreams: | nsamettwr2hC2.b1 |
Description: | The Present Weather Sensor measurement optics were blocked by heavy, wet snow during blizzard conditions. |
Measurements: | nsamettwr2hC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/28/2006 | 0700 | 03/06/2006 | 2100 |
Subject: | NSA/METTWR/C1 - CMH temp inaccurate |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The CMH Temperature was consistently 4-7 degrees warmer than the 2M, 40M, 20M, and 10M temp. Intake fan failure; fan was replaced. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/02/2006 | 0500 | 01/06/2006 | 1745 |
01/14/2006 | 1202 | 01/23/2006 | 1140 |
Subject: | NSA/METTWR/C1 - 10m Wind Speed Low |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The 10m wind speed values are too low due to ice accumulation on the cup anemometer. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/09/2006 | 1030 | 01/13/2006 | 0402 |
Subject: | NSA/METTWR/C1 - 10m Wind Speed Intermittently Low |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The 10m wind speeds are intermittently too low due to ice accumulation on the cup anemometer. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/10/2006 | 0600 | 01/13/2006 | 0402 |
01/26/2006 | 1602 | 01/27/2006 | 0516 |
02/03/2006 | 0020 | 02/05/2006 | 0540 |
Subject: | NSA/METTWR/C1 - 40m Wind Speeds Intermittently Low |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The 40m wind speed values were too low due to ice accumulation on the cup anemometer. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/06/2006 | 2212 | 04/11/2006 | 1812 |
Subject: | NSA/METTWR/C2 - CMH Data Suspect |
DataStreams: | nsamettwr2hC2.b1 |
Description: | CMH data was suspect due to incorrect intake fan installed. Proper spares were not on hand. |
Measurements: | nsamettwr2hC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/25/2006 | 0037 | 04/11/2006 | 1811 |
Subject: | NSA/METTWR/C1 - CMH Data Suspect |
DataStreams: | nsamettwr4hC1.b1 |
Description: | CMH data was suspect due to incorrect calibration caused by procedural errors. The procedures were corrected and a new calibration completed. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/25/2006 | 0300 | 06/01/2006 | 0000 |
Subject: | NSA/METTWR/C1 - Wind direction measurements suspect |
DataStreams: | nsamettwr4hC1.b1 |
Description: | 20m wind direction standard deviation was 0 degrees for extended periods of time. This suggests the wind vane was icing up. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/31/2003 | 0000 | 07/12/2006 | 1608 |
Subject: | NSA/METTWR/C1 - Reprocess: Barometric Data Changed from hPa to kPa |
DataStreams: | nsamettwr4hC1.b1 |
Description: | Barometric pressure data was converted from hPa to kPa in order to standardize the measurement units among ARM sites and to conform to accepted standard units determined by the scientific community. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/06/2003 | 0000 | 07/12/2006 | 1853 |
Subject: | NSA/METTWR/C2 - Reprocess: Barometric Data Changed from hPa to kPa |
DataStreams: | nsamettwr2hC2.b1 |
Description: | Barometric pressure data was converted from hPa to kPa in order to standardize the measurement units among ARM sites and to conform to accepted standard units determined by the scientific community. |
Measurements: | nsamettwr2hC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/11/2006 | 1756 | 08/11/2006 | 1925 |
Subject: | NSA/METTWR/C2 - CMH data missing and/or incorrect during maintenance. |
DataStreams: | nsamettwr2hC2.b1 |
Description: | CMH measured data was missing and the derived variables were incorrect due to routine maintenance. |
Measurements: | nsamettwr2hC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/21/2006 | 2228 | 08/21/2006 | 2329 |
08/22/2006 | 0233 | 08/22/2006 | 0301 |
08/23/2006 | 2214 | 08/23/2006 | 2219 |
08/24/2006 | 1617 | 08/24/2006 | 1628 |
08/25/2006 | 0257 | 08/25/2006 | 0309 |
09/01/2006 | 0158 | 09/01/2006 | 0331 |
Subject: | NSA/METTWR/C2 - PWS data missing/incorrect due to maintenance. |
DataStreams: | nsamettwr2hC2.b1 |
Description: | Present Weather Sensor data was missing or incorrect due to maintenance activities repeated approximately daily as we were trying to correct another problem. |
Measurements: | nsamettwr2hC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/11/2006 | 1952 | 08/11/2006 | 2006 |
Subject: | NSA/METTWR/C2 - Met data incorrect due to tower being lowered for maintenance. |
DataStreams: | nsamettwr2hC2.b1 |
Description: | Data from the tower is not representative of local conditions due to the tower being lowered for radiometer change. Sensors not attached to the tower such as the Present Weather Sensor, the Chilled Mirror Hygrometer and the Barometer were not affected. |
Measurements: | nsamettwr2hC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/25/2006 | 2234 | 10/04/2006 | 2347 |
Subject: | NSA/METTWR/C1 - All data from 10m Level Missing |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The winch that lowers the tower booms failed. Manual testing of the motor and winch allowed the booms to be lowered briefly and then raised back into position. A heavy freezing rain/icing event added extra weight to the booms. This extra weight was suspected as the cause as to why the 10m boom became disconnected. After a new motor was installed and all booms were lowered and re-raised the 10m level came back on line. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/18/2006 | 1840 | 10/23/2006 | 2230 |
Subject: | NSA/METTWR/C1 - 10m level loss of power |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The 10 meter instrument level lost power so all variables from this level are missing. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/18/2006 | 2240 | 10/23/2006 | 2230 |
Subject: | NSA/METTWR/C1 - 2m T/RH probe aspirator fan failed |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The aspirator fan for the 2m level T/RH probe failed. This caused higher than normal readings for temp and RH and artificially smoothed the data. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/12/2006 | 1500 | 03/14/2007 | 0234 |
Subject: | NSA/METTWR/C1 - CMH Sensor Calibrated Incorrectly |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The CMH temp and DP were higher than the co-located T/RH probe at the 2m level. An incorrect calibration along with a failing thermistor caused the readings to be incorrect for both measured values Temp and Dew Point. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2006 | 0000 | 05/22/2007 | 2347 |
Subject: | NSA/METTWR/C1 - 40m wind sensor heater failure |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The 40m wind direction became frozen at times. The values from the sensor were flat-lined (stdev = 0) much of the time and did not match sensors from other levels. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/20/2006 | 0030 | 11/27/2006 | 0254 |
12/08/2006 | 0125 | 12/14/2006 | 2229 |
12/16/2006 | 1545 | 12/21/2006 | 1105 |
12/23/2006 | 1612 | 01/18/2007 | 2357 |
01/20/2007 | 1357 | 01/29/2007 | 2140 |
Subject: | NSA/METTWR/C1 - 40m Wind Direction Data Suspect |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The 40m wind direction data was suspect due to icing on the vane or a failing shafter heater or a combination of both. The affected data can be easily seen on comparison plots with other levels data or by checking the standard deviation of the 40m wind direction. Any standard deviation of less than 0.10 degrees for the 40m level suggest a sluggish/ice affected sensor. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/09/2007 | 2326 | 10/10/2007 | 0004 |
Subject: | NSA/METTWR/C1 - PWS Data Questionable |
DataStreams: | nsamettwr4hC1.b1 |
Description: | There was a degradation in the PWS lenses. New lenses were installed on 08/28/2007 but a proper calibration was not conducted until 10/10/2007. Data during the listed time period should be used with caution. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/18/2006 | 0000 | 05/22/2007 | 2330 |
Subject: | NSA/METTWR/C1 - 20m RH Data Questionable |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The 20m RH data was questionable at times. When the data appeared to be poor was when the 2m and 20m agreed better than the 20m and the 40m and/or 10m. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/14/2008 | 2012 | 03/31/2008 | 0900 |
Subject: | NSA/METTWR/C1 - Intermittent missing data |
DataStreams: | nsamettwr4hC1.b1 |
Description: | Intermittent failure of the CMH to communicate with the logging system occurred on a daily basis. This problem occurred anywhere from 4 to 8 hrs. Problem began after maintenance to replace failing aspirator fan on 03/13/2008. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/05/2008 | 0000 | 03/27/2008 | 1730 |
Subject: | NSA/METTWR/C1 - 2m Wind Direction Sensor Freezing |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The 2m wind direction was failing. It began to exhibit instances of no movement suggesting it was frozen. After some time it began to make erratic measurements compared to the co-located Ultrasonic and compared to the directions at the other levels. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/07/2008 | 1200 | 03/13/2008 | 2345 |
Subject: | NSA/METTWR/C1 - CMH Intake Fan Failure |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The CMH intake fan failed causing the dew point and temp data to be incorrect. If users need only T/RH and derived variables they can use the 2m data collected using the HMP-45D probes. CMH data are unrecoverable. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/09/2008 | 2319 | 06/11/2008 | 2222 |
Subject: | NSA/METTWR/C1 - 2m Datalogger Failed |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The 2m temperature, wind speed, wind direction, and relative humidity were reporting the missing value (-9999). |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/14/2008 | 1500 | 06/20/2008 | 1420 |
Subject: | NSA/METTWR/C1 - CMH required Calibration |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The Chilled Mirror was showing some signs of being out of calibration. Temperatures were at times higher than co-located temp probes and the dew point temperature values at times were not consistent with co-located RH sensors. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/30/2008 | 1141 | 08/03/2008 | 2359 |
Subject: | NSA/METTWR/C1 - 2m level data incorrect |
DataStreams: | nsamettwr4hC1.b1 |
Description: | The 2m data for temp, RH, dew point, wind speed wind direction & vapor pressure were incorrect. The voltage values for the datalogger at that level were reporting as 60V with excursions to 100V. These values should have damaged the logger at that level. After an extended power outage on 08/04 the data all became reasonable. There is no explanation as to the cause of this failure. |
Measurements: | nsamettwr4hC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/21/1998 | 0000 | 10/22/1998 | 2200 |
Subject: | NSA/TOWER - Mislabeled tower sensors |
DataStreams: | nsametC1.00, nsamettwrC1.a1 |
Description: | The NSA tower data displayed on the local computer screen had the height mislabeled. Data written to files were correct. When the data acquisition program was fixed on 22 OCT 1998, only the computer display was changed. |
Measurements: | nsamettwrC1.a1:
nsametC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/08/1999 | 2200 | 10/25/1999 | 2300 |
Subject: | NSA/METTOWER - Questionable NSA Met-tower wind data |
DataStreams: | nsametC1.00, nsamettwrC1.a1 |
Description: | The data analysis software for the NSA Met_tower system was upgraded at 2200 GMT on 8 SEP 1999. The upgrade included replacement of missing data with -99.99's when the routine that polled the Met-tower sensors timed out. This resulted in large negative spikes in the 1-min averages. These spikes almost always occurred during the first several 1-min periods of a half-hour data processing routine. On 25 OCT 1999 at 2300 the routine that replaced missing data was changed to insert the previous 1-min averaged data instead of -99.99. Since at the most only one or two values are missing in ay averaging period, this change results in a reasonable estimate of the true mean values |
Measurements: | nsamettwrC1.a1:
nsametC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/08/1999 | 2200 | 11/15/1999 | 2200 |
Subject: | NSA/METTOWER - Questionable NSA Met-tower wind data |
DataStreams: | nsametC1.00, nsamettwrC1.a1 |
Description: | The data analysis software for the NSA Met-tower system was upgraded at 2200 GMT on 8 SEP 1999. The upgrade included insertion of -99.99's for the wind vectors when the wind speed or direction were either missing or equal to 0. This resulted in incorrect vector averaged wind speed, wind direction, and standard deviation of wind direction. When this occurred, the vector-averaged wind speed and standard deviation of wind direction were often abnormally high and the vector-averaged wind direction was often approximately 225 deg. Starting at 2300 GMT on 25 OCT 99 missing wind data were replaced by the previous 1-min average and starting at 2200 GMT on 15 NOV 1999 the computed wind vectors were used whenever wind speeds or wind directions were 0. |
Measurements: | nsamettwrC1.a1:
nsametC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/24/1998 | 0000 | 11/29/1999 | 2000 |
Subject: | NSA/METOWER - Reprocess: Incorrect NSA wind direction minima and maxima |
DataStreams: | nsametC1.00, nsamettwrC1.a1 |
Description: | From the time of installation of the NSA C1 Met-tower system on 24 MAR 1998 until 29 NOV 1999 all wind direction minima and maxima were reported as raw (unrotated) data. In order to obtain correct minima and maxima 30 deg must be subtracted from the value. All mean wind directions were computed from rotated (corrected) data. |
Measurements: | nsamettwrC1.a1:
nsametC1.00:
|