DQR ID | Subject | Data Streams Affected |
---|---|---|
D080428.2 | TWP/SMET/C1 - Reprocess: ORG Data has very small rainrate values | twpsmet60sC1.b1 |
D080428.3 | TWP/SMET/C3 - Reprocess: ORG Data has very small rainrate values | twpsmet60sC3.b1 |
D080428.4 | TWP/SMET/C2 - Reprocess: ORG Data has very small rainrate values | twpsmet60sC2.b1 |
D081022.5 | TWP/SMET/C2 - Wind Speed data contain offset due to induced voltage | twpsmet60sC2.b1 |
D090129.4 | TWP/SMET/C3 - Reprocess: Station Pressure values reported in hPa instead of kPa. | twpsmet60sC3.b1 |
D090304.1 | TWP/SMET/C1 - Optical Rain Gage Inoperative | twpsmet60sC1.b1 |
D090515.1 | TWP/SMET/C3 - Reprocess: Temperature Biased low by 1.06 Degrees | twpsmet60sC3.b1 |
D090604.2 | TWP/SMET/C2 - Barometer data incorrect | twpsmet60sC2.b1 |
D090708.1 | TWP/SMET/C1 - Reprocess: Barometric pressure data scaled incorrectly | twpsmet60sC1.b1 |
D090918.1 | TWP/SMET/C2 - Induced wind speed when calm | twpsmet60sC2.b1 |
D091023.1 | TWP/SMET/C3 - Tower Lowered for Maintenance | twpsmet60sC3.b1 |
D091030.2 | TWP/SMET/C2 - Tower Lowered for Maintenance | twpsmet60sC2.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/01/2004 | 0000 | 06/30/2010 | 2359 |
Subject: | TWP/SMET/C1 - Reprocess: ORG Data has very small rainrate values |
DataStreams: | twpsmet60sC1.b1 |
Description: | The ORG data is collected via analog signal and not digital. Therefore, we continuously collect data even when no rain is occurring. We also capture small events such as leaves, large bugs, dust, etc blowing through the measurement path. Because this discrete event occurs quickly the value is usually captured for 1 or 2 seconds. This value is then averaged to the minute producing rainrate on the order of .009 mm/hr or less. These values are not indicative of rain and should be removed from the record or summing over long periods can bias the climate record. We are reprocessing the data to remove these small values and are adjusting the collection program to remove them before ingest. |
Measurements: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/2004 | 0000 | 06/30/2010 | 2359 |
Subject: | TWP/SMET/C3 - Reprocess: ORG Data has very small rainrate values |
DataStreams: | twpsmet60sC3.b1 |
Description: | The ORG data is collected via analog signal and not digital. Therefore, we continuously collect data even when no rain is occurring. We also capture small events such as leaves, large bugs, dust, etc blowing through the measurement path. Because this discrete event occurs quickly the value is usually captured for 1 or 2 seconds. This value is then averaged to the minute producing rainrate on the order of .009 mm/hr or less. These values are not indicative of rain and should be removed from the record or summing over long periods can bias the climate record. We will reprocess the data to remove these small values. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/01/2004 | 0000 | 06/30/2010 | 2359 |
Subject: | TWP/SMET/C2 - Reprocess: ORG Data has very small rainrate values |
DataStreams: | twpsmet60sC2.b1 |
Description: | The ORG data is collected via analog signal and not digital. Therefore, we continuously collect data even when no rain is occurring. We also capture small events such as leaves, large bugs, dust, etc blowing through the measurement path. Because this discrete event occurs quickly the value is usually captured for 1 or 2 seconds. This value is then averaged to the minute producing rainrate on the order of .009 mm/hr or less. These values are not indicative of rain and should be removed from the record or summing over long periods can bias the climate record. We will reprocess the data to remove these small values. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/1998 | 0000 | 02/23/2009 | 0410 |
Subject: | TWP/SMET/C2 - Wind Speed data contain offset due to induced voltage |
DataStreams: | twpsmet60sC2.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: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/27/2009 | 1850 | 01/30/2009 | 1535 |
Subject: | TWP/SMET/C3 - Reprocess: Station Pressure values reported in hPa instead of kPa. |
DataStreams: | twpsmet60sC3.b1 |
Description: | An incorrect program was entered into the datalogger. This program did not convert the station pressure from hPa to kPa. This made the values larger by a factor of 10 and caused the QC bit to be tripped. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/07/2009 | 0100 | 04/03/2009 | 0225 |
Subject: | TWP/SMET/C1 - Optical Rain Gage Inoperative |
DataStreams: | twpsmet60sC1.b1 |
Description: | Beginning on 02/07/2009, the trending between the TBRG and ORG began to look poor, one recording precip when the other was not and vice versa. After a while the ORG quit registering any precip at all. ORG was replaced. |
Measurements: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/19/2005 | 0420 | 04/04/2009 | 0115 |
Subject: | TWP/SMET/C3 - Reprocess: Temperature Biased low by 1.06 Degrees |
DataStreams: | twpsmet60sC3.b1 |
Description: | The temperature of the SMET system was biased low by 1.06 Deg C due to a non-precision resistor being used int he measurement circuit. The data will be reprocessed. Saturation Vapor pressure and Vapor pressure will have to be reprocessed also. Add 1.06 degrees to the temperature data. Correct Sat Vap Press using the Buck approximation: Es = 6.1121exp((17.502*T)/(240.97 + T) where T is the temperature in C. Correct Vapor pressure using: E = (RH*Es)/100 |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/20/2009 | 0004 | 06/05/2009 | 2359 |
Subject: | TWP/SMET/C2 - Barometer data incorrect |
DataStreams: | twpsmet60sC2.b1 |
Description: | Beginning 05/20, atmos_pressure exceeded MAX between ~21:00 and 01:00 UTC on most days. The inlet tube was accidentally pinched in the door of the logger enclosure artificially increasing the atmospheric pressure during the listed times. Only a few hours exceeded max limits. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/06/2009 | 2319 | 07/07/2009 | 1348 |
Subject: | TWP/SMET/C1 - Reprocess: Barometric pressure data scaled incorrectly |
DataStreams: | twpsmet60sC1.b1 |
Description: | The barometer data was scaled incorrectly when a new program was loaded into the datalogger. The pressure data was reported as mb (hPa) instead of the standard kPa. So, in essence the value was a factor of ten to large. |
Measurements: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/01/2009 | 0100 | 10/15/2009 | 0300 |
Subject: | TWP/SMET/C2 - Induced wind speed when calm |
DataStreams: | twpsmet60sC2.b1 |
Description: | The upper and lower wind sensors were not trending well at wind speed below 1 m/s. Both sensors were showing values above 0m/s when calm. The lightning protector was at fault resulting in an induced wind voltage during calm conditions. Users should subtract any offset found (for example 0.19 m/s for upper wind speed) when the wind speeds are flat-lined. The offset value was not consistent. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/30/2009 | 0045 | 09/30/2009 | 0500 |
Subject: | TWP/SMET/C3 - Tower Lowered for Maintenance |
DataStreams: | twpsmet60sC3.b1 |
Description: | The tower was lowered for annual anemometer changes. The wind data is suspect. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/14/2009 | 2150 | 10/15/2009 | 0315 |
Subject: | TWP/SMET/C2 - Tower Lowered for Maintenance |
DataStreams: | twpsmet60sC2.b1 |
Description: | Data is suspect due to the tower being lowered. |
Measurements: | twpsmet60sC2.b1:
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