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 | twpsmet60sC1.00, twpsmet60sC1.a1, twpsmet60sC1.b1, twpsmetC1.00 |
D000718.11 | TWP/SMET/C1 - Periodic spikes in temperature and water vapor pressure | twpsmet60sC1.a1, twpsmet60sC1.b1 |
D000718.12 | TWP/SMET/C1 - Elevated relative humidity | twpsmet60sC1.a1, twpsmet60sC1.b1 |
D010709.15 | TWP/SMET/C1 - C1 TWP Wind speed calibration factor problem/ Wind1 | twpsmet60sC1.a1, twpsmet60sC1.b1 |
D010709.16 | TWP/SMET/C1 - C1 SMET Incorrect wind speed calibration factors | twpsmet60sC1.a1, twpsmet60sC1.b1 |
D020620.61 | TWP/C1 - Incorrect elevation reported in Manus Data | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1, twpsmet60sC1.a1, twpsmet60sC1.b1 |
D050421.6 | TWP/SMET/C1 - Negative rainfall rates | twpsmet60sC1.b1 |
D060817.3 | TWP/SMET/C1 - Reprocess: Barometric Data Changed from hPa to kPa | twpsmet60sC1.b1 |
D061011.2 | TWP/SMET/C1 - Reprocess: Tipping bucket rain gauge added | twpsmet60sC1.b1 |
D980416.33 | TWP/SMET/C1 - Surface pressure spike | twpsmet60sC1.b1 |
D990910.2 | Calibration interruption at TWP Nauru | twpsmet60sC1.a1, twpsmet60sC1.b1, twpsmetC2.00 |
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.b1:
twpsmet60sC1.00:
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.b1:
twpsmet60sC1.00:
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: | twpsmet60sC1.00, twpsmet60sC1.a1, twpsmet60sC1.b1, twpsmetC1.00 |
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.b1:
twpsmetC1.00:
twpsmet60sC1.00:
twpsmet60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/12/1998 | 0000 | 05/01/1998 | 0000 |
Subject: | TWP/SMET/C1 - Periodic spikes in temperature and water vapor pressure |
DataStreams: | twpsmet60sC1.a1, twpsmet60sC1.b1 |
Description: | Beginning on 980212 (day #43) spikes began to occur in the surface temperature and water vapor pressure. These spikes occur approximately once per hour (the spacing is very regular but occasionally an hour is skipped). In the one-minute averaged data, the temperature spike lasts for only one minute and dips approximately 4-5 C below the actual temperature. The one-minute standard deviation is more dramatic, rising from about 0.1 to about 35. The one minute temperature minimum is the most easily identifiable, each hour when the spike occurs, the minimum is -245.84. The vapor pressure mean jumps from about 30 to over 50 and the standard deviation jumps from less than 1 to more than 200. This problem was fixed by the RESET team on 980501. |
Measurements: | twpsmet60sC1.b1:
twpsmet60sC1.a1:
|
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 - C1 TWP Wind speed calibration factor problem/ Wind1 |
DataStreams: | twpsmet60sC1.a1, twpsmet60sC1.b1 |
Description: | Wind speed calibration factors were reversed between wind speed sensor 1 and 2. Results in less than 1% error, but correction factors may be used. |
Measurements: | twpsmet60sC1.b1:
twpsmet60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/25/1996 | 0000 | 03/02/1999 | 0000 |
Subject: | TWP/SMET/C1 - C1 SMET Incorrect wind speed calibration factors |
DataStreams: | twpsmet60sC1.a1, twpsmet60sC1.b1 |
Description: | Wind speed calibration factors were reversed between wind speed sensors 1 and 2. Error results in less than a 1% error in wind speed. A correction factor may be used. |
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: | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1, twpsmet60sC1.a1, twpsmet60sC1.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: | twpgndrad20sC1.a1:
twpgndrad60sC1.b1:
twpsmet60sC1.b1:
twpgndrad60sC1.a1:
twpsmet60sC1.a1:
|
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 |
---|---|---|---|
10/09/1996 | 0000 | 07/13/2006 | 2225 |
Subject: | TWP/SMET/C1 - Reprocess: Barometric Data Changed from hPa to kPa |
DataStreams: | twpsmet60sC1.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: | 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 |
---|---|---|---|
09/04/1997 | 0249 | 09/04/1997 | 0304 |
Subject: | TWP/SMET/C1 - Surface pressure spike |
DataStreams: | twpsmet60sC1.b1 |
Description: | A spike occured in the surface pressure. The reported pressure rose as high as 1300 hPa but returned to normal levels after 15 minutes. |
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: | twpsmet60sC1.a1, twpsmet60sC1.b1, twpsmetC2.00 |
Description: | Occasional calibration interuption occured while calibration SMET instruments |
Measurements: | twpsmet60sC1.b1:
twpsmetC2.00:
twpsmet60sC1.a1:
|