DQR ID | Subject | Data Streams Affected |
---|---|---|
D081022.13 | HFE/MET/M1 - Wind Speed data contain offset due to induced voltage | hfemetM1.b1 |
D090211.3 | HFE/AOS/M1 - No sub 1 micron data | hfeaosM1.a1 |
D090211.5 | HFE/AOS/M1 - CPC data missing | hfeaosM1.a1 |
D090211.6 | HFE/AOS/M1 - CCN missing | hfeaosccnM1.a1 |
D090213.3 | HFE/MWRHF/M1 - Calibration updates | hfemwrhfM1.b1 |
D090213.4 | HFE/MWRHF/M1 - Rain sensor failure | hfemwrhfM1.b1 |
D090216.3 | HFE/MET/M1 - Intermittent barometer failure | hfemetM1.b1 |
D090216.4 | HFE/MET/M1 - Intermittent PWD data | hfemetM1.b1 |
D090220.3 | HFE/MET/M1 - Induced voltage on wind speed sensor cable | hfemetM1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/19/2008 | 0000 | 12/28/2008 | 2159 |
Subject: | HFE/MET/M1 - Wind Speed data contain offset due to induced voltage |
DataStreams: | hfemetM1.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: | hfemetM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/06/2008 | 1717 | 07/24/2008 | 0000 |
Subject: | HFE/AOS/M1 - No sub 1 micron data |
DataStreams: | hfeaosM1.a1 |
Description: | The aerosol size switching impactors were stuck in the sub 10 micron mode. So all aerosol is sub 10 um. |
Measurements: | hfeaosM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/19/2008 | 0000 | 07/22/2008 | 0450 |
Subject: | HFE/AOS/M1 - CPC data missing |
DataStreams: | hfeaosM1.a1 |
Description: | The CPC wasn't installed until July 22nd when the mentor visited the site. |
Measurements: | hfeaosM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/08/2008 | 0320 | 07/25/2008 | 0429 |
Subject: | HFE/AOS/M1 - CCN missing |
DataStreams: | hfeaosccnM1.a1 |
Description: | A power regulator on the CCN circuit board failed. The mentor replaced it and it was up and working on 7/25/2008. |
Measurements: | hfeaosccnM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/09/2008 | 0500 | 12/28/2008 | 2359 |
Subject: | HFE/MWRHF/M1 - Calibration updates |
DataStreams: | hfemwrhfM1.b1 |
Description: | The MWRHF calibration algorithm updates the calibration parameters every time a new successful tip curve is acquired. This results in small jumps (1-2 K) in the brightness temperatures each time calibration is updated. During times of frequent calibrations the data appear discontinuous with short data segments interrupted by small jumps. |
Measurements: | hfemwrhfM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/28/2008 | 0000 | 08/04/2008 | 0300 |
Subject: | HFE/MWRHF/M1 - Rain sensor failure |
DataStreams: | hfemwrhfM1.b1 |
Description: | The rain sensor failed and the rain flag was always on. When the rain flag is on the radiometer does not perform tip curves. The rain sensor was replaced 8/4. |
Measurements: | hfemwrhfM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/19/2008 | 0000 | 12/28/2008 | 2159 |
Subject: | HFE/MET/M1 - Intermittent barometer failure |
DataStreams: | hfemetM1.b1 |
Description: | Intermittent barometer failure occurred throughout the deployment. We were unable to pinpoint the cause of the failure. Typically one or two minutes of missing data occurred every few days. Since pressure data is typically invariant over 1 minute, linear interpolation should be fine to fill in missing data. |
Measurements: | hfemetM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/19/2008 | 0000 | 12/28/2008 | 2159 |
Subject: | HFE/MET/M1 - Intermittent PWD data |
DataStreams: | hfemetM1.b1 |
Description: | The Present Weather Detector had intermittent missing values throughout this deployment. Missing values occurred almost everyday, usually just one or two minutes per day. |
Measurements: | hfemetM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/19/2008 | 0000 | 12/28/2008 | 2359 |
Subject: | HFE/MET/M1 - Induced voltage on wind speed sensor cable |
DataStreams: | hfemetM1.b1 |
Description: | The cable for the wind monitor is not a twisted pair shielded cable. This caused an induced voltage on the wind sensor wires from the wind direction measurement excitation voltage. A small offset is added into the wind speeds. This value varies. Most frequently the values of 0.49, 0.588 and 0.686 m/s were added into the wind speed. On 11/27/2008 the value jumped to 0.98 m/s for most of the day. |
Measurements: | hfemetM1.b1:
|