DQR ID | Subject | Data Streams Affected |
---|
D040722.4 | TWP/SMET/C3 - Rain blocked pressure port | twpsmet60sC3.b1 |
D040726.3 | TWP/SMET/C3 - Negative rainfall rates | twpsmet60sC3.b1 |
D050210.1 | TWP/SMET/C3 - Data non-representative | twpsmet60sC3.b1 |
D050418.2 | TWP/SMET/C3 - Lower wind direction sensor failure | twpsmet60sC3.b1 |
D050725.11 | TWP/MWR/C3 - Reprocess - Revised Retrieval Coefficients | twpmwrlosC3.a1, twpmwrlosC3.b1, twpmwrtipC3.a1 |
D050808.3 | TWP/SMET/C3 - Data not representative | twpsmet60sC3.b1 |
D050928.5 | TWP/MWR/C3 - New software version (4.15) installed | twpmwrlosC3.b1, twpmwrtipC3.a1 |
D051114.2 | TWP/MWR/C3 - Instrument failure, Power outage | twpmwrC3.00, twpmwrlosC3.a1, twpmwrlosC3.b1, twpmwrtipC3.a1 |
D051115.1 | TWP/SMET/C3 - Upper wind sensor failure | twpsmet60sC3.b1 |
D051117.2 | TWP/SMET/C3 - RH Values Artificially High | twpsmet60sC3.b1 |
D051117.3 | TWP/SMET/C3 - Instrument failure | twpsmet60sC3.b1 |
D051214.1 | TWP/MWR/C3 - REPROCESS- Updated retrieval coefficients | twpmwrlosC3.b1, twpmwrtipC3.a1 |
D060426.8 | TWP/SMET/C3 - ORG data noisy due to degraded ground | twpsmet60sC3.b1 |
D060502.3 | TWP/SMET/C3 - Reprocessed: Lower windspeed sensor calibration error | twpsmet60sC3.b1 |
D060601.1 | TWP/MWR/C3 - Site shutdown | twpmwrC3.00, twpmwrlosC3.a1, twpmwrlosC3.b1, twpmwrtipC3.a1 |
D060627.1 | TWP/SMET/C3 - Data not representative | twpsmet60sC3.b1 |
D060818.3 | TWP/SMET/C3 - Reprocess: Barometric pressure units change
| twpsmet60sC3.b1 |
D061011.4 | TWP/SMET/C3 - Reprocess: Tipping bucket rain gauge added | twpsmet60sC3.b1 |
D061114.4 | TWP/MWR/C3 - Sun in field of view of radiometer | twpmwrlosC3.b1, twpmwrtipC3.a1 |
D061221.2 | TWP/RAIN/C3 - faulty precipitation result from blocked funnel | twprainC3.b1 |
D070306.2 | TWP/SMET/C3 - Barometer Data Incorrect | twpsmet60sC3.b1 |
D070306.3 | TWP/SMET/C3 - Water in enclosure | twpsmet60sC3.b1 |
D070803.1 | TWP/SMET/C3 - Upper wind speed artificially slow | twpsmet60sC3.b1 |
D071105.1 | TWP/SMET/C3 - ORG overestimated rainfall | twpsmet60sC3.b1 |
D080225.1 | TWP/SMET/C3 - Upper Wind Sensor Data Questionable | twpsmet60sC3.b1 |
D080611.2 | TWP/SMET/C3 - Lower Wind Direction Intermittently Wrong | twpsmet60sC3.b1 |
D080715.1 | TWP/SMET/C3 - Upper wind speed data incorrect | twpsmet60sC3.b1 |
D080922.5 | TWP/SMET/C3 - Missing data | twpsmet60sC3.b1 |
D081022.8 | TWP/SMET/C3 - Wind Speed data contain offset due to induced voltage | twpsmet60sC3.b1 |
D090225.3 | TWP/SMET/C3 - Reprocess: Temperature data biased low | twpsmet60sC3.b1 |
D090515.1 | TWP/SMET/C3 - Reprocess: Temperature Biased low by 1.06 Degrees | twpsmet60sC3.b1 |
Subject: | TWP/SMET/C3 - Data non-representative |
DataStreams: | twpsmet60sC3.b1
|
Description: | Tower mast was lowered for inspection. Data during this time is non-representative. |
Measurements: | twpsmet60sC3.b1: - Lower sensor, wind speed minimum(lo_spd_min)
- Precipitation maximum(precip_max)
- Lower sensor, wind direction standard deviation(lo_dir_sd)
- precipitation minimum(precip_min)
- Upper sensor, wind speed maximum(up_spd_max)
- Tipping bucket raingauge total(tbrg_total)
- Mean Air Temperature or Hardware Error(temp_mean)
- Upper sensor, wind direction standard deviation(up_dir_sd)
- Vapor pressure mean(vappress_mean)
- Lower sensor, wind speed arithmetic average(lo_spd_arith_avg)
- Barometric Pressure(atmos_pressure)
- Lower sensor, wind speed standard deviation(lo_spd_sd)
- Vapor pressure standard deviation(vappress_sd)
- Lower sensor, wind speed maximum(lo_spd_max)
- Mean Relative Humidity(relh_mean)
- Upper sensor, wind speed arithmetic average(up_spd_arith_avg)
- Lower sensor, wind speed vector average(lo_spd_vec_avg)
- Upper sensor, wind direction vector average(up_dir_vec_avg)
- Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
- Precipitation mean(precip_mean)
- Lower sensor, wind direction vector average(lo_dir_vec_avg)
- Precipitation standard deviation(precip_sd)
- Upper sensor, wind speed minimum(up_spd_min)
- Tipping bucket raingauge count total(tbrg_count_total)
- Upper sensor, wind speed standard deviation(up_spd_sd)
- Std Dev of Air Temperature(temp_sd)
- Upper sensor, wind speed vector average(up_spd_vec_avg)
|
Subject: | TWP/MWR/C3 - Reprocess - Revised Retrieval Coefficients |
DataStreams: | twpmwrlosC3.a1, twpmwrlosC3.b1, twpmwrtipC3.a1
|
Description: | IN THE BEGINNING (June 1992), the retrieval coefficients used to derive
the precipitable water vapor (PWV) and liquid water path (LWP) from the
MWR brightness temperatures were based on the Liebe and Layton (1987)
water vapor and oxygen absorption model and the Grant (1957) liquid
water absorption model.
Following the SHEBA experience, revised retrievals based on the more
recent Rosenkranz (1998) water vapor and oxygen absorption models and
the Liebe (1991) liquid waer absorption model were developed. The
Rosenkranz water vapor absorption model resulted a 2 percent increase
in PWV relative to the earlier Liebe and Layton model. The Liebe
liquid water absorption model decreased the LWP by 10% relative to the
Grant model. However, the increased oxygen absorption caused a
0.02-0.03 mm (20-30 g/m2) reduction in LWP, which was particularly
significant for low LWP conditions (i.e. thin clouds encountered at
SHEBA).
Recently, it has been shown (Liljegren, Boukabara, Cady-Pereira, and
Clough, TGARS v. 43, pp 1102-1108, 2005) that the half-width of the
22 GHz water vapor line from the HITRAN compilation, which is 5 percent
smaller than the Liebe and Dillon (1969) half-width used in Rosenkranz
(1998), provided a better fit to the microwave brightness temperature
measurements at 5 frequencies in the range 22-30 GHz, and yielded more
accurate retrievals. Accordingly, revised MWR retrieval coefficients
have been developed using MONORTM, which utilizes the HITRAN compilation
for its spectroscopic parameters. These new retrievals provide 3
percent less PWV and 2.6 percent greater LWP than the previous
retrievals based on Rosenkranz (1998).
Although the MWR data will be reprocessed to apply the new monortm-based
retrievals, for most purposes it will be sufficient to correct the data
using the following factors:
PWV_MONORTM = 0.9695 * PWV_ROSENKRANZ
LWP_MONORTM = 1.026 * LWP_ROSENKRANZ
The Rosenkranz-based retrieval coefficients was active at TWP.C3 from
inception of the data, 20020227.0151. The MONORTM-based retrieval
coefficients became active at TWP.C3 20050630.2100.
Note: a reprocessing effort is already underway to apply the
Rosenkranz-based retrieval coefficients to all MWR prior to April
2002. An additional reprocessing task will be undertaken to apply
the MONORTM retrieval to all MWR data when the first is completed.
Read reprocessing comments in the netcdf file header carefully to
ensure you are aware which retrieval is in play. |
Measurements: | twpmwrlosC3.a1: - MWR column precipitable water vapor(vap)
- Averaged total liquid water along LOS path(liq)
twpmwrlosC3.b1: - MWR column precipitable water vapor(vap)
- Averaged total liquid water along LOS path(liq)
twpmwrtipC3.a1: - Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
- Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
|
Subject: | TWP/SMET/C3 - Data not representative |
DataStreams: | twpsmet60sC3.b1
|
Description: | Tower was lowered for radiometer change and characterization. Data are not representative
of local conditions. |
Measurements: | twpsmet60sC3.b1: - Lower sensor, wind speed minimum(lo_spd_min)
- Precipitation maximum(precip_max)
- Lower sensor, wind direction standard deviation(lo_dir_sd)
- precipitation minimum(precip_min)
- Upper sensor, wind speed maximum(up_spd_max)
- Tipping bucket raingauge total(tbrg_total)
- Mean Air Temperature or Hardware Error(temp_mean)
- Upper sensor, wind direction standard deviation(up_dir_sd)
- Vapor pressure mean(vappress_mean)
- Lower sensor, wind speed arithmetic average(lo_spd_arith_avg)
- Barometric Pressure(atmos_pressure)
- Lower sensor, wind speed standard deviation(lo_spd_sd)
- Vapor pressure standard deviation(vappress_sd)
- Lower sensor, wind speed maximum(lo_spd_max)
- Mean Relative Humidity(relh_mean)
- Upper sensor, wind speed arithmetic average(up_spd_arith_avg)
- Lower sensor, wind speed vector average(lo_spd_vec_avg)
- Upper sensor, wind direction vector average(up_dir_vec_avg)
- Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
- Precipitation mean(precip_mean)
- Lower sensor, wind direction vector average(lo_dir_vec_avg)
- Precipitation standard deviation(precip_sd)
- Upper sensor, wind speed minimum(up_spd_min)
- Tipping bucket raingauge count total(tbrg_count_total)
- Upper sensor, wind speed standard deviation(up_spd_sd)
- Std Dev of Air Temperature(temp_sd)
- Upper sensor, wind speed vector average(up_spd_vec_avg)
|
Subject: | TWP/MWR/C3 - Instrument failure, Power outage |
DataStreams: | twpmwrC3.00, twpmwrlosC3.a1, twpmwrlosC3.b1, twpmwrtipC3.a1
|
Description: | A lightning strike sent the MWR offline. The radiometer suffered extensive damage, was
removed from the site and sent to the vendor for repair. A spare radiometer was sent to the
TWP/C3 site and was installed on 12/07. However, some hardaware communication issues
prevented data collection until 12/10. |
Measurements: | twpmwrlosC3.a1: - Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
- MWR column precipitable water vapor(vap)
- 23.8 GHz Blackbody signal(bb23)
- Sky brightness temperature at 31.4 GHz(tbsky31)
- Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
- Temperature correction coefficient at 31.4 GHz(tc31)
- Water on Teflon window (1=WET, 0=DRY)(wet_window)
- base time(base_time)
- Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
- 23.8 GHz blackbody+noise injection signal(bbn23)
- Mixer kinetic (physical) temperature(tkxc)
- Temperature correction coefficient at 23.8 GHz(tc23)
- (tknd)
- Averaged total liquid water along LOS path(liq)
- Dummy altitude for Zeb(alt)
- 31.4 GHz blackbody(bb31)
- lon(lon)
- Ambient temperature(tkair)
- Sky Infra-Red Temperature(sky_ir_temp)
- 23.8 GHz sky signal(sky23)
- Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
- lat(lat)
- Time offset of tweaks from base_time(time_offset)
- Sky brightness temperature at 23.8 GHz(tbsky23)
- Blackbody kinetic temperature(tkbb)
- 31.4 GHz blac2body+noise injection signal(bbn31)
- 31.4 GHz sky signal(sky31)
twpmwrlosC3.b1: - 23.8 GHz blackbody+noise injection signal(bbn23)
- lon(lon)
- 31.4 GHz blac2body+noise injection signal(bbn31)
- Temperature correction coefficient at 23.8 GHz(tc23)
- Time offset of tweaks from base_time(time_offset)
- MWR column precipitable water vapor(vap)
- Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
- Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
- Water on Teflon window (1=WET, 0=DRY)(wet_window)
- (tknd)
- Ambient temperature(tkair)
- Sky brightness temperature at 31.4 GHz(tbsky31)
- base time(base_time)
- Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
- Dummy altitude for Zeb(alt)
- 23.8 GHz Blackbody signal(bb23)
- Averaged total liquid water along LOS path(liq)
- 31.4 GHz blackbody(bb31)
- 31.4 GHz sky signal(sky31)
- 23.8 GHz sky signal(sky23)
- Sky brightness temperature at 23.8 GHz(tbsky23)
- Temperature correction coefficient at 31.4 GHz(tc31)
- lat(lat)
- Sky Infra-Red Temperature(sky_ir_temp)
- Blackbody kinetic temperature(tkbb)
- Mixer kinetic (physical) temperature(tkxc)
- Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
twpmwrtipC3.a1: - Ambient temperature(tkair)
- Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
- Water on Teflon window (1=WET, 0=DRY)(wet_window)
- 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
- Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
- Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
- Temperature correction coefficient at 23.8 GHz(tc23)
- 23.8 GHz sky signal(tipsky23)
- 31.4 GHz blackbody(bb31)
- Time offset of tweaks from base_time(time_offset)
- 23.8 GHz blackbody+noise injection signal(bbn23)
- Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
- 31.4 GHz blac2body+noise injection signal(bbn31)
- base time(base_time)
- Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
- 23.8 GHz Blackbody signal(bb23)
- Blackbody kinetic temperature(tkbb)
- (tknd)
- Temperature correction coefficient at 31.4 GHz(tc31)
- Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
- Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
- 31.4 GHz goodness-of-fit coefficient(r31)
- 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
- lon(lon)
- Mixer kinetic (physical) temperature(tkxc)
- Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
- 31.4 GHz sky signal(tipsky31)
- 23.8 GHz goodness-of-fit coefficient(r23)
- Dummy altitude for Zeb(alt)
- lat(lat)
- Actual elevation angle(actel)
- Actual Azimuth(actaz)
twpmwrC3.00: - null(Raw data stream - documentation not supported)
|
Subject: | TWP/SMET/C3 - Data not representative |
DataStreams: | twpsmet60sC3.b1
|
Description: | The Anemometer readings were incorrect due to the tower being lowered for maintenance. |
Measurements: | twpsmet60sC3.b1: - Lower sensor, wind speed standard deviation(lo_spd_sd)
- Lower sensor, wind speed minimum(lo_spd_min)
- Lower sensor, wind speed maximum(lo_spd_max)
- Upper sensor, wind speed arithmetic average(up_spd_arith_avg)
- Lower sensor, wind speed vector average(lo_spd_vec_avg)
- Upper sensor, wind direction vector average(up_dir_vec_avg)
- Lower sensor, wind direction standard deviation(lo_dir_sd)
- Upper sensor, wind speed maximum(up_spd_max)
- Lower sensor, wind direction vector average(lo_dir_vec_avg)
- Upper sensor, wind speed minimum(up_spd_min)
- Upper sensor, wind direction standard deviation(up_dir_sd)
- Lower sensor, wind speed arithmetic average(lo_spd_arith_avg)
- Upper sensor, wind speed standard deviation(up_spd_sd)
- Upper sensor, wind speed vector average(up_spd_vec_avg)
|
Subject: | TWP/SMET/C3 - Missing data |
DataStreams: | twpsmet60sC3.b1
|
Description: | Data are missing and unrecoverable. |
Measurements: | twpsmet60sC3.b1: - time(time)
- lat(lat)
- Lower sensor, wind speed minimum(lo_spd_min)
- Time offset of tweaks from base_time(time_offset)
- Precipitation maximum(precip_max)
- Battery Voltage(internal_voltage)
- Logger panel temperature(logger_temp)
- Lower sensor, wind direction standard deviation(lo_dir_sd)
- precipitation minimum(precip_min)
- Upper sensor, wind speed maximum(up_spd_max)
- Tipping bucket raingauge total(tbrg_total)
- Mean Air Temperature or Hardware Error(temp_mean)
- Vapor pressure mean(vappress_mean)
- Upper sensor, wind direction standard deviation(up_dir_sd)
- Lower sensor, wind speed arithmetic average(lo_spd_arith_avg)
- Barometric Pressure(atmos_pressure)
- Lower sensor, wind speed standard deviation(lo_spd_sd)
- Vapor pressure standard deviation(vappress_sd)
- Mean Relative Humidity(relh_mean)
- Lower sensor, wind speed maximum(lo_spd_max)
- Upper sensor, wind speed arithmetic average(up_spd_arith_avg)
- Lower sensor, wind speed vector average(lo_spd_vec_avg)
- Upper sensor, wind direction vector average(up_dir_vec_avg)
- Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
- Precipitation mean(precip_mean)
- Lower sensor, wind direction vector average(lo_dir_vec_avg)
- base time(base_time)
- Dummy altitude for Zeb(alt)
- Precipitation standard deviation(precip_sd)
- lon(lon)
- Upper sensor, wind speed minimum(up_spd_min)
- Tipping bucket raingauge count total(tbrg_count_total)
- Upper sensor, wind speed vector average(up_spd_vec_avg)
- Std Dev of Air Temperature(temp_sd)
- Upper sensor, wind speed standard deviation(up_spd_sd)
|
Subject: | TWP/SMET/C3 - Wind Speed data contain offset due to induced voltage |
DataStreams: | twpsmet60sC3.b1
|
Description: | The marine model of the RM Young wind sensor needs twisted pair shielded cable. The
manufacturer did not originally supply the pigtail with twisted pair shielded cable. Use of
twisted pair shielded cable for the rest of the cable run to the logger was also not
specified. This caused an induced voltage in the wind speed line from the wind direction
excitation. The induced voltage varied from sensor to sensor and probably changed anytime
the cable was replaced or parts of the wind sensor were repaired or replaced. The induced
voltage has been seen to vary from 0.15 m/s to as much as 1.08 m/s. |
Measurements: | twpsmet60sC3.b1: - Upper sensor, wind speed maximum(up_spd_max)
- Lower sensor, wind speed minimum(lo_spd_min)
- Lower sensor, wind speed standard deviation(lo_spd_sd)
- Lower sensor, wind speed maximum(lo_spd_max)
- Upper sensor, wind speed arithmetic average(up_spd_arith_avg)
- Lower sensor, wind speed vector average(lo_spd_vec_avg)
- Upper sensor, wind speed minimum(up_spd_min)
- Lower sensor, wind speed arithmetic average(lo_spd_arith_avg)
- Upper sensor, wind speed vector average(up_spd_vec_avg)
- Upper sensor, wind speed standard deviation(up_spd_sd)
|