DQR ID | Subject | Data Streams Affected |
---|---|---|
D000608.7 | TWP/C2/SMET Wind Speeds | twpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00 |
D000608.8 | TWP/C2/SMET Wind Speeds | twpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00 |
D000608.9 | TWP/C2/SMET Winds Speeds | twpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00 |
D000613.2 | TWP/C2/SMET Temperature spike | twpsmet60sC2.a1, twpsmet60sC2.b1 |
D000613.3 | TWP/C2/SMET - Pressure sensitivity to rain | twpsmet60sC2.a1, twpsmet60sC2.b1 |
D020109.2 | TWP/SMET/C2 - RH Sensor bad at Nauru | twpsmet60sC2.a1, twpsmet60sC2.b1 |
D020613.9 | TWP/C2 Installation | twpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00 |
D030131.1 | TWP/SMET/C2 - Temperature Sensor Failed, Data Missing | twpsmet60sC2.a1, twpsmet60sC2.b1 |
D030501.5 | TWP/SMET/C2 - WIND SENSOR #1 (HIGHER) INOPERATIVE | twpsmet60sC2.b1 |
D040421.1 | TWP/SMET/C2 - Wind Sensor failure | twpsmet60sC2.b1 |
D040722.6 | TWP/SMET/C2 - All data missing due to logger change | twpsmet60sC2.b1 |
D040722.7 | TWP/SMET/C2 - connection and timing issues with new logger | twpsmet60sC2.b1 |
D040726.1 | TWP/SMET/C2 - Negative rainfall rates | twpsmet60sC2.b1 |
D040824.2 | TWP/SMET/C2 - Incorrect rainrate equation used. | twpsmet60sC2.b1 |
D050301.1 | TWP/SMET/C2 - Instrument failure | twpsmet60sC2.b1 |
D050322.2 | TWP/SMET/C2 - Upper wind sensor failure | twpsmet60sC2.b1 |
D050714.1 | TWP/SMET/C2 - RH failure | twpsmet60sC2.b1 |
D050920.4 | TWP/SMET/C2 - Instrument maintenance | twpsmet60sC2.b1 |
D050921.2 | TWP/SMET/C2 - ORG data incorrect | twpsmet60sC2.b1 |
D051005.6 | TWP/SMET/C2 - Tower down for calibration activities | twpsmet60sC2.b1 |
D060614.2 | TWP/SMET/C2 - Temp/RH probe failure | twpsmet60sC2.b1 |
D060818.2 | TWP/SMET/C2 - Reprocess: Barometric Data Changed from hPa to kPa | twpsmet60sC2.b1 |
D061011.3 | TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge added | twpsmet60sC2.b1 |
D070510.5 | TWP/SMET/C2 - Lower windspeed sensor questionable | twpsmet60sC2.b1 |
D070520.1 | TWP/SMET/C2 - Lower Wind Sensor Direction Incorrect | twpsmet60sC2.b1 |
D071219.1 | TWP/SMET/C2 - Lower Wind Speed Data Suspect | twpsmet60sC2.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/24/1998 | 0000 | 01/08/1999 | 2100 |
Subject: | TWP/C2/SMET Wind Speeds |
DataStreams: | twpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00 |
Description: | Beginning on December 24, Anemometer #1 (there are two anemometers on the SMET stand) occasionally reported wind speed values that were low relative to the other sensor. It is clear from the data that the low reading here is the anomalous one. |
Measurements: | twpsmetC2.00:
twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/09/1999 | 2300 | 01/10/1999 | 0600 |
Subject: | TWP/C2/SMET Wind Speeds |
DataStreams: | twpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00 |
Description: | Beginning on December 24, Anemometer #1 (there are two anemometers on the SMET stand) occasionally reported wind speed values that were low relative to the other sensor. It is clear from the data that the low reading here is the anomalous one. |
Measurements: | twpsmetC2.00:
twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/14/1999 | 1430 | 01/14/1999 | 2100 |
Subject: | TWP/C2/SMET Winds Speeds |
DataStreams: | twpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00 |
Description: | Beginning on December 24, Anemometer #1 (there are two anemometers on the SMET stand) occasionally reported wind speed values that were low relative to the other sensor. It is clear from the data that the low reading here is the anomalous one. |
Measurements: | twpsmetC2.00:
twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/03/1998 | 2105 | 12/03/1999 | 2105 |
Subject: | TWP/C2/SMET Temperature spike |
DataStreams: | twpsmet60sC2.a1, twpsmet60sC2.b1 |
Description: | There was a brief -4 C spike in the temperature at approximately 21.5 Z on December 3. This spike also showed up in the vapor pressure which is calculated from the temperature and relative humidity. |
Measurements: | twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/20/1998 | 0000 | 12/31/1998 | 2359 |
Subject: | TWP/C2/SMET - Pressure sensitivity to rain |
DataStreams: | twpsmet60sC2.a1, twpsmet60sC2.b1 |
Description: | The pressure behaves anomalously during rain events - even very mild ones. Normally, the pressure undergoes a smooth semi-diurnal oscillation with little higher frequency variability. However, during and shortly after rain events, the pressure signal exhibits abrupt changes - this sort of behavior has occasionally been observed at Manus but not with the regularity seen here. Examples of this behaviour occur on (date in the form YYYYMMDD): 19981212 19981215 19981216 19981217 19981223 19981224 19981225 19981230 19981231 |
Measurements: | twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/16/2001 | 0300 | 01/03/2002 | 0841 |
Subject: | TWP/SMET/C2 - RH Sensor bad at Nauru |
DataStreams: | twpsmet60sC2.a1, twpsmet60sC2.b1 |
Description: | RH sensor bad from 16 Dec 2001 03 GMT to 3 Jan 2002 |
Measurements: | twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/21/1998 | 0312 | 11/19/1998 | 2359 |
Subject: | TWP/C2 Installation |
DataStreams: | twpsmet60sC2.a1, twpsmet60sC2.b1, twpsmetC2.00 |
Description: | The Nauru ARCS was installed during the period September-November 1998. Data were being collected by the end of October, but for the first several weeks of November, the site was undergoing considerable change, so data from that period should be used with caution. The official site dedication occured on November 20. Most on-site activity ended following the dedication so we will consider November 20 to be the beginning of the Nauru operations. The last members of the installation team left Nauru on November 24. |
Measurements: | twpsmetC2.00:
twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/24/2003 | 0100 | 01/30/2003 | 0500 |
Subject: | TWP/SMET/C2 - Temperature Sensor Failed, Data Missing |
DataStreams: | twpsmet60sC2.a1, twpsmet60sC2.b1 |
Description: | The T/RH sensor on Nauru failed and was replaced (only the temperature sensor failed). |
Measurements: | twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/12/2003 | 1000 | 04/24/2003 | 0020 |
Subject: | TWP/SMET/C2 - WIND SENSOR #1 (HIGHER) INOPERATIVE |
DataStreams: | twpsmet60sC2.b1 |
Description: | Wind speed sensor #1 (higher sensor) failed. Wind speeds were reported as 0 m/s and wind direction data was not in agreement with wind sensor #2. Anemometer was replaced. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/10/2004 | 0000 | 04/24/2004 | 2303 |
Subject: | TWP/SMET/C2 - Wind Sensor failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | Wind sensor #2 (lower one) failed. Wind direction showed little or no variation, unlike the colocated sensor #1. This caused lower wind speed values as the sensor was not rotating properly to orient itself parallel to the wind stream. The sensor was replaced. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/06/2004 | 2003 | 07/07/2004 | 0137 |
Subject: | TWP/SMET/C2 - All data missing due to logger change |
DataStreams: | twpsmet60sC2.b1 |
Description: | All data are missing at this site during this time period due to collection system, logger and enclosure change. Data resumed after change. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/07/2004 | 0138 | 07/07/2004 | 2018 |
Subject: | TWP/SMET/C2 - connection and timing issues with new logger |
DataStreams: | twpsmet60sC2.b1 |
Description: | Atmospheric pressure data are intermittent during this time period due to connection problems and program timing issues with new logger installation. Data resumed normal operations after this time period. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/21/1998 | 0311 | 07/06/2004 | 0138 |
Subject: | TWP/SMET/C2 - Negative rainfall rates |
DataStreams: | twpsmet60sC2.b1 |
Description: | Due to limitations of the Zeno dataloggers all voltage measurements from the optical rain gauge (ORG) were converted to rainfall rates. This resulted in negative values for rain rates. Any value below 0.10 mm/hr should be considered to be 0 mm/hr. New dataloggers alleviated this problem. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/07/2004 | 0137 | 08/17/2004 | 2157 |
Subject: | TWP/SMET/C2 - Incorrect rainrate equation used. |
DataStreams: | twpsmet60sC2.b1 |
Description: | There are two different Optical Raingages in use at the TWP sites. The incorrect equation was used at this site. The incorrect equation is (25*(V^1.87)) - 0.15. The correct equation is (20*(V^2)) - 0.05. The correct equation was installed. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/12/2005 | 1955 | 03/03/2005 | 0430 |
Subject: | TWP/SMET/C2 - Instrument failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | Upper wind sensor failed. Wind direction was reported at a near constant value of 69 degrees and was significantly different than the lower wind sensor's direction values. Sensor replaced. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/09/2005 | 2300 | 04/17/2005 | 0332 |
Subject: | TWP/SMET/C2 - Upper wind sensor failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | After replacement on 03/03/2005 the upper wind sensor began reporting erroneous values again on 03/09/2005 becoming very apparent after 03/17/2005. Wind speed data appears reasonable but the wind direction data do not agree well with the lower wind sensor. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/10/2005 | 1900 | 07/14/2005 | 2226 |
Subject: | TWP/SMET/C2 - RH failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | The RH values were frequently over MAX value of 104% starting on 7/10/2005 through end of period. Sensor was replaced. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/21/2005 | 1625 | 09/21/2005 | 1815 |
Subject: | TWP/SMET/C2 - Instrument maintenance |
DataStreams: | twpsmet60sC2.b1 |
Description: | Instrument calibration and testing were taking place for brief periods. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/19/2005 | 0809 | 09/19/2005 | 1902 |
Subject: | TWP/SMET/C2 - ORG data incorrect |
DataStreams: | twpsmet60sC2.b1 |
Description: | Data from the ORG was incorrect due to heavy condensation on the lens. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/19/2005 | 0200 | 09/19/2005 | 0330 |
Subject: | TWP/SMET/C2 - Tower down for calibration activities |
DataStreams: | twpsmet60sC2.b1 |
Description: | Tower lowered, wind vanes spun at different frequencies, and ORG tested with electronic rain. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/05/2006 | 2144 | 06/15/2006 | 0427 |
Subject: | TWP/SMET/C2 - Temp/RH probe failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | Temperature/RH probe failed and was replaced. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/21/1998 | 0000 | 07/13/2006 | 2232 |
Subject: | TWP/SMET/C2 - Reprocess: Barometric Data Changed from hPa to kPa |
DataStreams: | twpsmet60sC2.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: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/21/1998 | 0000 | 11/29/2006 | 2014 |
Subject: | TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge added |
DataStreams: | twpsmet60sC2.b1 |
Description: | A tipping bucket rain gauge was added to the TWP.C2 SMET suite of instruments on 20061129. Effective 20060926, two new variables (count and rain amount) were added to the end of the twpsmet60sC2.b1 datastream. Between 9/26 and 11/29, the data for these two variables are filled with zeros. Users should not use the data during this period as the zeros are not representative of the rain fall at the site. When reprocessing of this datastream occurs these variables will be added for the 19981021-20060926 and data from 19981021-20061129 will be filled with -9999 (missing). |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/05/2007 | 0000 | 08/19/2007 | 2135 |
Subject: | TWP/SMET/C2 - Lower windspeed sensor questionable |
DataStreams: | twpsmet60sC2.b1 |
Description: | Lower wind speed sensor had degraded bearings. This sensor was reporting as much as 0.4 m/s lower values than the upper sensors when the winds were 2 m/s or below. The sensor was replaced. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/11/2007 | 0000 | 05/22/2007 | 0047 |
Subject: | TWP/SMET/C2 - Lower Wind Sensor Direction Incorrect |
DataStreams: | twpsmet60sC2.b1 |
Description: | Wind directions between lower and upper anemometers were displaced by approximately 45 degrees from 05/10/2007 through 05/21/2007 when a new sensor was installed to replace a failing sensor. The new sensor direction data incorrect. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/22/2007 | 0048 | 08/19/2007 | 2150 |
Subject: | TWP/SMET/C2 - Lower Wind Speed Data Suspect |
DataStreams: | twpsmet60sC2.b1 |
Description: | The lower wind speed bearings appeared to be binding at speeds below 2 m/s as it did not compare well with the upper wind monitor. |
Measurements: | twpsmet60sC2.b1:
|