DQR ID | Subject | Data Streams Affected |
---|---|---|
D060112.4 | NIM/SKYRAD/M1 - IRTs do not agree with AERI | nimskyrad60sM1.b1 |
D060222.1 | NIM/SKYRAD/M1 - Instrument ventilator problem | nimskyradM1.00, nimskyrad20sM1.a0, nimskyrad60sM1.b1 |
D060407.1 | NIM/MET/M1 - Software problem | nimmetM1.b1 |
D080304.3 | NIM/MET/M1 - ORG Data Underestimated Precipitation | nimmetM1.b1 |
D080428.7 | NIM/MET/M1 - Reprocess: ORG Data has very small rainrate values | nimmetM1.b1 |
D081022.11 | NIM/MET/M1 - Wind Speed data contain offset due to induced voltage | nimmetM1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/26/2005 | 0000 | 06/07/2006 | 1900 |
Subject: | NIM/SKYRAD/M1 - IRTs do not agree with AERI |
DataStreams: | nimskyrad60sM1.b1 |
Description: | Since deployment at PYE, and then at NIM, the AMF SKYRAD IRT measured about 10K higher sky temperatures than the AERI and the MWRP IRT measureed about 20K higher than the AERI. Several actions were taken to diagnose the problem including confirming the correct configuration of the IRTs and data logger, cleaning the mirror and lens, and replacing the mirror. After several days of rain beginning 6/2/2006, the three instruments came into agreement. It is unknown whether this was a problem with the AERI, MWRP-IRT or SKYRAD-IRT. |
Measurements: | nimskyrad60sM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/23/2005 | 0000 | 02/23/2006 | 0800 |
Subject: | NIM/SKYRAD/M1 - Instrument ventilator problem |
DataStreams: | nimskyradM1.00, nimskyrad20sM1.a0, nimskyrad60sM1.b1 |
Description: | Data quality office first reported that PIR1 and PIR2 appear to be deviating more than typical during the daylight hours. It was found that the Skyrad PIR ventilator fans were building up debris on the intake air filter. Obstructed air flow results in solar heating of the PIR ventilator housing in the later part of the day and biasing the incomming IR irradiance values. The slow buildup was insidious and wasn't discovered and corrected (i.e. ventilator fans cleaned on a regular and frequent basis) until Feb 23rd. On or around December 23rd was when this problem may have first started. We are unable to quantify the extent of the problem in W/m2. Normal deviation between PIRs is typically 3-5 W/m2. |
Measurements: | nimskyrad20sM1.a0:
nimskyrad60sM1.b1:
nimskyradM1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/10/2006 | 1600 | 03/01/2006 | 0803 |
Subject: | NIM/MET/M1 - Software problem |
DataStreams: | nimmetM1.b1 |
Description: | Intermittent Failure of Logger to read data from the Barometer. |
Measurements: | nimmetM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/06/2006 | 0000 | 01/06/2007 | 2359 |
Subject: | NIM/MET/M1 - ORG Data Underestimated Precipitation |
DataStreams: | nimmetM1.b1 |
Description: | The ORG underestimated precipitation by about 38% during the entire NIM deployment. No troubleshooting technique or replacement of gage was successful in correcting the problem. |
Measurements: | nimmetM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/06/2006 | 0000 | 01/07/2007 | 2359 |
Subject: | NIM/MET/M1 - Reprocess: ORG Data has very small rainrate values |
DataStreams: | nimmetM1.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: | nimmetM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/06/2006 | 0000 | 01/07/2007 | 2359 |
Subject: | NIM/MET/M1 - Wind Speed data contain offset due to induced voltage |
DataStreams: | nimmetM1.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: | nimmetM1.b1:
|