DQR ID | Subject | Data Streams Affected |
---|---|---|
D060407.1 | NIM/MET/M1 - Software problem | nimmetM1.b1 |
D060419.1 | NIM/TSI/M1 - Reprocess: Data processing problem | nimtsicldmaskM1.a1, nimtsiskycoverM1.b1 |
D060419.4 | NIM/MWR/M1 - Instrument noise problem/RF interference | nimmwrM1.00, nimmwrlosM1.b1, nimmwrtipM1.a1 |
D060524.2 | NIM/MET/M1 - Optical Rain Gauge Failure | nimmetM1.b1 |
D060718.1 | NIM/MWR/M1 - Reprocessed: Recalibration to correct for occasional overheating. | nimmwrlosM1.b1, nimmwrtipM1.a1 |
D060927.1 | NIM/MWR/M1 - Sun in field of view of radiometer | nimmwrlosM1.b1 |
D061006.1 | NIM/SKYRAD/M1 - Tracker inoperative | nimskyrad20sM1.a0, nimskyrad60sM1.b1, nimskyradM1.00 |
D061024.1 | NIM/TSI/M1 - Shadowband glare | nimtsiskycoverM1.b1 |
D080304.2 | NIM/MET/M1 - ORG Data Incorrect | 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 |
---|---|---|---|
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 |
---|---|---|---|
11/24/2005 | 0000 | 09/19/2006 | 1729 |
Subject: | NIM/TSI/M1 - Reprocess: Data processing problem |
DataStreams: | nimtsicldmaskM1.a1, nimtsiskycoverM1.b1 |
Description: | Due to the high aerosol conditions at Niamey, the TSI appeared to be beyond the limits of processing the color JPEG image into cloud fraction values. Several attempts to adjust the sky filter values used to process the images did not yielded the desired results. The processed images indicate an opaque sky cover, even in the absence of clouds. The problem was corrected by removing the neutral density filter from the lens and re-adjusting the sky filter values. The data can be reprocessed. |
Measurements: | nimtsicldmaskM1.a1:
nimtsiskycoverM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/15/2006 | 0000 | 01/08/2007 | 0000 |
Subject: | NIM/MWR/M1 - Instrument noise problem/RF interference |
DataStreams: | nimmwrM1.00, nimmwrlosM1.b1, nimmwrtipM1.a1 |
Description: | Data are affected by intermittent spikes that become more frequent starting in March 2006. Spikes affect data mostly around 9 AM and 18:00 PM. The origin of the spikes is probably RF interference. |
Measurements: | nimmwrtipM1.a1:
nimmwrM1.00:
nimmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/13/2006 | 0000 | 05/26/2006 | 1015 |
Subject: | NIM/MET/M1 - Optical Rain Gauge 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 |
---|---|---|---|
03/01/2006 | 0000 | 01/08/2007 | 0000 |
Subject: | NIM/MWR/M1 - Reprocessed: Recalibration to correct for occasional overheating. |
DataStreams: | nimmwrlosM1.b1, nimmwrtipM1.a1 |
Description: | The radiometer was intermittently thermally unstable resulting in poor calibrations for four brief time periods. These data have been reprocessed to apply corrected calibrations. The affected time periods were: 20060302-20060303 20060423-20060425 20060512-20060515 20060531-20060603 |
Measurements: | nimmwrtipM1.a1:
nimmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/01/2006 | 0000 | 08/31/2006 | 2300 |
Subject: | NIM/MWR/M1 - Sun in field of view of radiometer |
DataStreams: | nimmwrlosM1.b1 |
Description: | Around 12 pm every day between 8/1 and 8/31 there is an increase in the brightness temperature due to the sun being in the field of view of the radiometer. |
Measurements: | nimmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/12/2006 | 1200 | 10/05/2006 | 1330 |
Subject: | NIM/SKYRAD/M1 - Tracker inoperative |
DataStreams: | nimskyrad20sM1.a0, nimskyrad60sM1.b1, nimskyradM1.00 |
Description: | Starting on 9/12 the NIM radiometer tracker drifted enough due to sinking supports and a drifting clock that the direct normal measurments (NIP) and the downwelling hemispheric diffuse shortwave measurments (8-48) were adversely affected in the afternoon hours. The shortwave hemispheric global instrument (PSP) and downelling hemispheric longwave shaded1 and shaded2 (PIR) are unaffected by this problem. The tracker problem greatly affected direct measurements and affected the diffuse measurement to a lesser extent. There are no redundant measurements for these instruments. However, during this time range the data collected before local noon (aprox 1140GMT) for all shortwave Skyrad instruments appear to be good. |
Measurements: | nimskyrad20sM1.a0:
nimskyrad60sM1.b1:
nimskyradM1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/17/2006 | 1310 | 11/01/2006 | 0700 |
Subject: | NIM/TSI/M1 - Shadowband glare |
DataStreams: | nimtsiskycoverM1.b1 |
Description: | When the neutral density filter was removed from the lens, the reflection of the sun from the smooth shadowband strip became much brighter causing a glare in the image on clear days. To minimize this reflection, a rough surface (the "fuzzy" side of an adhesive velco strip) was placed along the length of the shadowband. |
Measurements: | nimtsiskycoverM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/24/2006 | 0800 | 07/24/2006 | 0900 |
Subject: | NIM/MET/M1 - ORG Data Incorrect |
DataStreams: | nimmetM1.b1 |
Description: | The ORG measured around 9cm of rain in a short period while other co-located sensors measured no precip. Use the Present Weather Detector data instead or set the ORG rainfall to 0mm during this time period. |
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:
|