DQR ID | Subject | Data Streams Affected |
---|---|---|
D000302.1 | TWP/SMET/C1 - Reprocess: Skewed wind direction 1 data | twpsmet60sC1.00, twpsmet60sC1.a1, twpsmet60sC1.b1 |
D000504.5 | TWP/SMET/C1 - Wind Direction alignment method | twpsmet60sC1.00, twpsmet60sC1.a1, twpsmet60sC1.b1 |
D000621.1 | TWP/SMET/C1 - Incorrect calibration for ARCS1 Wind speed | twpsmetC1.00, twpsmet60sC1.00, twpsmet60sC1.a1, twpsmet60sC1.b1 |
D000622.3 | TWP/C1 - Incorrect elevation reported in Manus Data | twpsondewnpnC1.a1 |
D000717.1 | TWP/MWR/C1 - Rain on window | twpmwrlosC1.b1, twpmwrtipC1.a1 |
D000718.12 | TWP/SMET/C1 - Elevated relative humidity | twpsmet60sC1.a1, twpsmet60sC1.b1 |
D010709.15 | TWP/SMET/C1 - Wind speed calibration errors | twpsmet60sC1.a1, twpsmet60sC1.b1 |
D020620.61 | TWP/C1 - Incorrect elevation reported in Manus Data | twpsmet60sC1.a1, twpsmet60sC1.b1, twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
D020620.66 | TWP/C1 - Incorrect elevation reported in Manus Data | twpsondewnpnC1.a1 |
D040220.1 | TWP/MWR/C1 - wrong azimuth | twpmwrlosC1.b1 |
D050421.6 | TWP/SMET/C1 - Negative rainfall rates | twpsmet60sC1.b1 |
D060420.6 | TWP/MWR/C1 - Software Change | twpmwrlosC1.b1 |
D060420.9 | TWP/MWR/C1 - software upgrade (version 3.29) | twpmwrlosC1.b1 |
D060817.3 | TWP/SMET/C1 - Reprocess: Barometric pressure units change | twpsmet60sC1.b1 |
D061011.2 | TWP/SMET/C1 - Reprocess: Tipping bucket rain gauge added | twpsmet60sC1.b1 |
D070105.1 | TWP/MWR/C1 - Missing data | twpmwrlosC1.b1 |
D080922.3 | TWP/SMET/C1 - Missing data | twpsmet60sC1.b1 |
D081022.3 | TWP/SMET/C1 - Wind Speed data contain offset due to induced voltage | twpsmet60sC1.b1 |
D990910.2 | Calibration interruption at TWP Nauru | twpsmetC2.00, twpsmet60sC1.a1, twpsmet60sC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/24/1999 | 0000 | 11/25/1999 | 0450 |
Subject: | TWP/SMET/C1 - Reprocess: Skewed wind direction 1 data |
DataStreams: | twpsmet60sC1.00, twpsmet60sC1.a1, twpsmet60sC1.b1 |
Description: | Wind direction 1 data is incorrect. Manus SMET wind direction for Wind-1 (upper unit) was apparently skewed from its original position as a result of checking direction calibration. As near as we can tell the position of the sensor was rotated clockwise Somewhere in the range of 45-90 degrees, most likely in steps 22.5 degrees. Data comparison performed on 3-2-00, using a small amount of data from this instrument. |
Measurements: | twpsmet60sC1.00:
twpsmet60sC1.b1:
twpsmet60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/25/1999 | 0450 | 04/02/2000 | 0000 |
Subject: | TWP/SMET/C1 - Wind Direction alignment method |
DataStreams: | twpsmet60sC1.00, twpsmet60sC1.a1, twpsmet60sC1.b1 |
Description: | During RESET10 we discovered a problem with wind direction from WIND1 (upper anemometer). During RESET8, WIND1 was corrected by rotating the alignment ring instead of the anemometer. This resulted in a better agreement between the 2 anemometers, but is not the correct way to align an anemometer. The alignment ring was readjusted for true north and the anemometer reset in the proper slot (the original problem). |
Measurements: | twpsmet60sC1.00:
twpsmet60sC1.b1:
twpsmet60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/23/1999 | 0000 | 04/01/2000 | 2359 |
Subject: | TWP/SMET/C1 - Incorrect calibration for ARCS1 Wind speed |
DataStreams: | twpsmetC1.00, twpsmet60sC1.00, twpsmet60sC1.a1, twpsmet60sC1.b1 |
Description: | On 23 OCT 99, during Reset 8, an incorrect slope of was entered for the upper, windspeed1, wind speed sensor resulting in a 1% overestimate of the wind speed. The correct calibration was entered on 1 APR 2000 during RESET 10. |
Measurements: | twpsmet60sC1.00:
twpsmet60sC1.b1:
twpsmet60sC1.a1:
twpsmetC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/28/1997 | 0455 | 06/22/2000 | 2359 |
Subject: | TWP/C1 - Incorrect elevation reported in Manus Data |
DataStreams: | twpsondewnpnC1.a1 |
Description: | (From Bill Clements) We have been using 6m MSL as the station elevation of Momote (Manus). This was based on information posted near the station barometer in the Momote Weather Service Office. It turns out that the official WMO station elevation for Momote is 4m MSL and the upper air elevation is 5m MSL. All Manus instruments except the sonde station are at 4m MSL. The sonde launching station is at 5m MSL. |
Measurements: | twpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/25/1997 | 0000 | 11/13/1997 | 0000 |
12/01/1997 | 0000 | 01/13/1998 | 0000 |
04/01/1998 | 0000 | 03/31/1999 | 0000 |
Subject: | TWP/MWR/C1 - Rain on window |
DataStreams: | twpmwrlosC1.b1, twpmwrtipC1.a1 |
Description: | The data is subject to contamination due to rain on the sensor window and should be used with caution because the heater/blower assembly that prevents water from accumulating on the sensor's teflon window was out of commission. |
Measurements: | twpmwrtipC1.a1:
twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/16/1998 | 0000 | 08/12/1999 | 0000 |
Subject: | TWP/SMET/C1 - Elevated relative humidity |
DataStreams: | twpsmet60sC1.a1, twpsmet60sC1.b1 |
Description: | The relative humidity has been exceeding 100% with unusual regularity. The most dramatic case occured on December 31 when the RH exceeded 100% for 18 hours and exceeded 103.5% for 6 hours with a maximum value of 103.8%. A PIF was submitted to propose changing this sensor. This change occurred on August 12, 1999. |
Measurements: | twpsmet60sC1.b1:
twpsmet60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/25/1996 | 0000 | 03/02/1999 | 2359 |
Subject: | TWP/SMET/C1 - Wind speed calibration errors |
DataStreams: | twpsmet60sC1.a1, twpsmet60sC1.b1 |
Description: | Wind speed calibration factors were reversed between wind speed sensors 1 (upper) and 2 (lower). Results in less than 1% error, but correction factors may be used. To correct wind speed #1 (upper) add 0.03 m/s. To correct wind speed #2 (lower) subtract 0.03 m/s. |
Measurements: | twpsmet60sC1.b1:
twpsmet60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/10/1996 | 0001 | 06/22/2000 | 2359 |
Subject: | TWP/C1 - Incorrect elevation reported in Manus Data |
DataStreams: | twpsmet60sC1.a1, twpsmet60sC1.b1, twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1 |
Description: | (From Bill Clements) We have been using 6m MSL as the station elevation of Momote (Manus). This was based on information posted near the station barometer in the Momote Weather Service Office. It turns out that the official WMO station elevation for Momote is 4m MSL and the upper air elevation is 5m MSL. All Manus instruments except the sonde station are at 4m MSL. The sonde launching station is at 5m MSL. |
Measurements: | twpgndrad60sC1.b1:
twpgndrad60sC1.a1:
twpsmet60sC1.b1:
twpgndrad20sC1.a1:
twpsmet60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/03/1997 | 0000 | 06/22/2000 | 2359 |
Subject: | TWP/C1 - Incorrect elevation reported in Manus Data |
DataStreams: | twpsondewnpnC1.a1 |
Description: | (From Bill Clements) We have been using 6m MSL as the station elevation of Momote (Manus). This was based on information posted near the station barometer in the Momote Weather Service Office. It turns out that the official WMO station elevation for Momote is 4m MSL and the upper air elevation is 5m MSL. All Manus instruments except the sonde station are at 4m MSL. The sonde launching station is at 5m MSL. |
Measurements: | twpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/11/1996 | 0000 | 02/18/2004 | 2250 |
Subject: | TWP/MWR/C1 - wrong azimuth |
DataStreams: | twpmwrlosC1.b1 |
Description: | The MWR was initially installed at an azimuth angle defined as 180 degrees but the value in the configuration file was not changed from the default of 0 degrees. In examining photos taken during the installation of the AWS tower, I noticed that the MWR was rotated opposite the normal orientation. The value in the configuration file was changed to reflect the actual azimuth of the instrument. |
Measurements: | twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/1996 | 0000 | 03/09/2004 | 2243 |
Subject: | TWP/SMET/C1 - Negative rainfall rates |
DataStreams: | twpsmet60sC1.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. New loggers were installed 03/09/2004 @ 2243 GMT. |
Measurements: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/11/1996 | 0000 | 02/27/1999 | 1200 |
Subject: | TWP/MWR/C1 - Software Change |
DataStreams: | twpmwrlosC1.b1 |
Description: | The MWR operating software was changed on 27 February 1999 to provide additional functionality as described below. NEW FEATURES 1. Faster sampling rate Standard line-of-sight (LOS) observations can now be acquired at 15-second intervals vs. 20-second intervals previously. (The standard LOS cycle is comprised of one sky sample per blackbody sample and gain update.) 2. More flexible sampling strategy Multiple sky observations can be acquired during a LOS cycle, up to 1024 per gain update. This permits sky samples to be acquired at intervals of 2.67 seconds for improved temporal resolution of cloud liquid water variations and better coordination with the millimeter cloud radar during IOPs. 3. Separation of zenith LOS observations from TIP data When the radiometer is in TIP mode, the zenith LOS observations are now extracted, the PWV and LWP computed and reported separately in the output file. This eliminates the periods of missing LOS data during calibration checks/updates. 4. Automatic self-calibration The software now permits the calibration to be updated at specified intervals or continuously. In the first case, LOS mode is automatically changed to TIP mode at user-specified intervals or whenever clear sky conditions occur, the tip data reduced, the calibration updated, and the radiometer returned to LOS mode without operator intervention. In the second case, the radiometer is continuously is TIP mode until changed by the operator. 5. Graphical user display The graphical display is comprised of a status display, a message display, a temperature plot, a plot of the retrieved PWV and LWP, and (in TIP mode) a plot of the latest tip curves. |
Measurements: | twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/11/1996 | 0000 | 03/15/1999 | 1700 |
Subject: | TWP/MWR/C1 - software upgrade (version 3.29) |
DataStreams: | twpmwrlosC1.b1 |
Description: | The MWR operating program was upgraded to version 3.29 on 15 March 1999. This version included a beam width correction as well as provided the capability to automatically level the elevation mirror (that is, to automatically detect and correct offsets in the elevation angle stepper motor position.) The improvement in the quality of the tip curves resulting from the auto-leveling has been dramatic: differences in the brightness temperatures at 3 airmasses (19.5 and 160.5 degrees) have been reduced from +/- 5 K to +/- 0.5 K. In order to take full advantage of this improvement to detect and reject cloudy tip curves, the minimum value of the goodness-of-fit coefficient for a valid tip curve has been increased from 0.995 to 0.998. |
Measurements: | twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/1996 | 0000 | 08/02/2004 | 1911 |
Subject: | TWP/SMET/C1 - Reprocess: Barometric pressure units change |
DataStreams: | twpsmet60sC1.b1 |
Description: | Barometric pressure data during this time period is reported in hPa. After this time, the data have been converted to kPa to standardize the measurement units among ARM sites and to conform to accepted standard units determined by the scientific community. |
Measurements: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/1996 | 0000 | 10/17/2006 | 0000 |
Subject: | TWP/SMET/C1 - Reprocess: Tipping bucket rain gauge added |
DataStreams: | twpsmet60sC1.b1 |
Description: | A tipping bucket rain gauge was added to the TWP.C1 SMET suite of instruments on 20061017. Effective 20060926, two new variables (count and rain amount) were added to the end of the twpsmet60sC1.b1 datastream. Between 9/26 and 10/17, 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 19961009-20060926 and data from 19961009-20061017 will be filled with -9999 (missing). |
Measurements: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/09/1996 | 2338 | 12/11/1996 | 0003 |
02/28/1997 | 0118 | 06/27/1997 | 2048 |
11/06/1997 | 1959 | 11/12/1997 | 1800 |
01/05/1998 | 0204 | 01/08/1998 | 2048 |
04/21/1998 | 0017 | 04/29/1998 | 1803 |
09/13/1998 | 0759 | 09/20/1998 | 0900 |
11/20/1998 | 2226 | 11/27/1998 | 1026 |
02/27/1999 | 0600 | 03/02/1999 | 0159 |
03/06/1999 | 0800 | 03/09/1999 | 1807 |
09/03/1999 | 0300 | 09/10/1999 | 0400 |
10/01/1999 | 0900 | 10/18/1999 | 0000 |
10/20/1999 | 0500 | 10/22/1999 | 0600 |
01/14/2000 | 0800 | 01/16/2000 | 0342 |
01/14/2006 | 1258 | 01/16/2006 | 0638 |
01/05/2011 | 2300 | 01/07/2011 | 0310 |
02/25/2011 | 1300 | 03/07/2011 | 0400 |
03/16/2011 | 1900 | 03/31/2011 | 0100 |
Subject: | TWP/MWR/C1 - Missing data |
DataStreams: | twpmwrlosC1.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/04/1997 | 0553 | 06/11/1997 | 0653 |
09/03/1999 | 0332 | 09/10/1999 | 0406 |
10/01/1999 | 0932 | 10/18/1999 | 0000 |
03/13/2000 | 0944 | 03/15/2000 | 1533 |
03/18/2000 | 2025 | 03/22/2000 | 1629 |
06/17/2000 | 0729 | 06/21/2000 | 2226 |
08/09/2000 | 2305 | 08/11/2000 | 1542 |
08/12/2000 | 1552 | 08/14/2000 | 1807 |
10/15/2000 | 1823 | 10/17/2000 | 0016 |
10/18/2000 | 1326 | 10/20/2000 | 0014 |
10/24/2000 | 1601 | 10/26/2000 | 2332 |
10/31/2000 | 1914 | 11/02/2000 | 0032 |
11/05/2000 | 0517 | 11/07/2000 | 2333 |
08/16/2002 | 0929 | 08/22/2002 | 0315 |
10/27/2002 | 0859 | 10/31/2002 | 0114 |
Subject: | TWP/SMET/C1 - Missing data |
DataStreams: | twpsmet60sC1.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/1996 | 0000 | 11/03/2008 | 0730 |
Subject: | TWP/SMET/C1 - Wind Speed data contain offset due to induced voltage |
DataStreams: | twpsmet60sC1.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: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/09/1999 | 0030 | 08/11/1999 | 0300 |
Subject: | Calibration interruption at TWP Nauru |
DataStreams: | twpsmetC2.00, twpsmet60sC1.a1, twpsmet60sC1.b1 |
Description: | Occasional calibration interuption occured while calibration SMET instruments |
Measurements: | twpsmet60sC1.b1:
twpsmetC2.00:
twpsmet60sC1.a1:
|