DQR ID | Subject | Data Streams Affected | Data Quality Metric |
---|---|---|---|
D060407.1 | NIM/MET/M1 - Software problem | nimmetM1.b1 | Missing |
D060524.2 | NIM/MET/M1 - ORG failure | nimmetM1.b1 | Incorrect |
D060630.42 | NIM/GNDRAD/M1 - Reprocessed: Longwave calibration error | nimgndrad60sM1.b1 | Does not affect quality |
D070203.1 | NIM/GNDRAD/M1 - Station setup and troubleshooting | nimgndrad60sM1.b1 | Suspect |
D080304.3 | NIM/MET/M1 - ORG underestimated precipitation | nimmetM1.b1 | Suspect |
D081022.11 | NIM/MET/M1 - Wind Speed data contain offset due to induced voltage | nimmetM1.b1 | Suspect |
D091217.1 | NIM/MET/M1 - PWD cumulative precipitation incorrect | nimmetM1.b1 | Incorrect |
D091217.2 | NIM/MET/M1 - PWD 1 minute rainfall data suspect | nimmetM1.b1 | Suspect |
D111006.8 | NIM/MET/M1 - Deployment period | nimmetM1.b1 | Suspect |
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/10/2006 | 1600 | 03/01/2006 | 0803 | Missing |
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 | Data Quality Metric |
---|---|---|---|---|
05/13/2006 | 0000 | 05/26/2006 | 1015 | Incorrect |
Subject: | NIM/MET/M1 - ORG failure |
DataStreams: | nimmetM1.b1 |
Description: | The optical rain gauge on the met system did not record precipitation during this time period. |
Measurements: | nimmetM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
11/25/2005 | 1700 | 12/22/2005 | 1100 | Does not affect quality |
Subject: | NIM/GNDRAD/M1 - Reprocessed: Longwave calibration error |
DataStreams: | nimgndrad60sM1.b1 |
Description: | Modified pyrgeometer calibration procedures were implemented beginning in December 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place have been reprocessed to remove the calibration bias. The reprocessed 60 second averaged data are based on 3 instantaneous 20 second data records rather than on 60 1 second instantaneous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in February 2007. |
Measurements: | nimgndrad60sM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
11/24/2005 | 0000 | 12/01/2005 | 1400 | Suspect |
Subject: | NIM/GNDRAD/M1 - Station setup and troubleshooting |
DataStreams: | nimgndrad60sM1.b1 |
Description: | This station was collecting data for the first time at this location - There were multiple instrument setup problems (PIR cabling, IRT setup)that were being corrected during this time. Radiometer data is unreliable during this period. |
Measurements: | nimgndrad60sM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/06/2006 | 0000 | 01/06/2007 | 2359 | Suspect |
Subject: | NIM/MET/M1 - ORG underestimated precipitation |
DataStreams: | nimmetM1.b1 |
Description: | The ORG underestimated precipitation by about 38% during the entire NIM deployment. No troubleshooting technique or replacement of gauge was successful in correcting the problem. |
Measurements: | nimmetM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/06/2006 | 0000 | 01/07/2007 | 2359 | Suspect |
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:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
05/31/2006 | 0000 | 07/31/2006 | 2359 | Incorrect |
Subject: | NIM/MET/M1 - PWD cumulative precipitation incorrect |
DataStreams: | nimmetM1.b1 |
Description: | The Present Weather Detector is a serial sensor. The MET system datalogger reads in the data from this sensor. During the time in question serial comms problems were causing the data from the sensor to be read incorrectly. The data for one variable showed up in data for another variable or not at all. We reprocessed the data to correct as much of this error as we could. The cumulative rainfall variable was calculated from the instantaneous rainfall variable during reprocessing. Since we cannot be entirely sure all cumulative rainfall values are correct or were completely captured the cumulative rainfall data is considered to be unreliable. This issue shows up when comparing the cumulative rainfall data at the end of the day 07/31/2006 (79.08) and the beginning of the next day 08/01/2006 (3.17). Clearly we were either under or over-estimating the cumulative rainfall. |
Measurements: | nimmetM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
05/31/2006 | 0000 | 07/31/2006 | 2359 | Suspect |
Subject: | NIM/MET/M1 - PWD 1 minute rainfall data suspect |
DataStreams: | nimmetM1.b1 |
Description: | The Present Weather Detector is a serial sensor. The MET system datalogger reads in the data from this sensor. During the time in question serial comms problems were causing the data from the sensor to be read incorrectly. The data for one variable showed up in data for another variable or not at all. We reprocessed the data to correct as much of this error as we could. We cannot be entirely certain that all rainfall values are correct or were captured properly. It is possible that some values were missed completely. |
Measurements: | nimmetM1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/20/2005 | 0000 | 01/05/2006 | 2359 | Suspect |
Subject: | NIM/MET/M1 - Deployment period |
DataStreams: | nimmetM1.b1 |
Description: | All data from the met tower are suspect during this time period as the systems were being deployed and in various states of operation. |
Measurements: | nimmetM1.b1:
|