DQR ID | Subject | Data Streams Affected |
---|---|---|
D010709.15 | TWP/SMET/C1 - Wind speed calibration errors | twpsmet60sC1.a1, twpsmet60sC1.b1 |
D020620.61 | TWP/C1 - Incorrect elevation reported in Manus Data | twpgndrad20sC1.a1, twpgndrad60sC1.a1, twpgndrad60sC1.b1, twpsmet60sC1.a1, twpsmet60sC1.b1 |
D050421.4 | TWP/SMET/C1 - Negative Rainfall Rates | twpsmet60sC1.a1 |
D081022.2 | TWP/SMET/C1 - Wind Speed data contain offset due to induced voltage | 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: | 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 | 03/03/2003 | 2359 |
Subject: | TWP/SMET/C1 - Negative Rainfall Rates |
DataStreams: | twpsmet60sC1.a1 |
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: | twpsmet60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/1996 | 0000 | 03/03/2003 | 2359 |
Subject: | TWP/SMET/C1 - Wind Speed data contain offset due to induced voltage |
DataStreams: | twpsmet60sC1.a1 |
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.a1:
|