DQR ID | Subject | Data Streams Affected |
---|---|---|
D000127.1 | TWP/MWR/C2 - Uncertainty in clock time | twpmwrlosC2.b1, twpmwrtipC2.a1 |
D000608.10 | TWP/MPL/C2 - Power Oscillation | twpmplC2.a1 |
D000608.11 | TWP/C2/MPL Detector | twpmplcmask1clothC2.c1, twpmplnor1campC2.c1, twpmplsmask1clothC2.c1, twpmplC2.a1, twpmplC2.00 |
D001113.2 | TWP/MPL/C2 - Nauru MPL Laser Diode accidentally off | twpmplC2.a1 |
D010227.4 | TWP/MWR/C2 - Excessive wet_window flags | twpmwrlosC2.b1, twpmwrtipC2.a1 |
D020207.3 | TWP/MPL/C2 - Laser emission accidentally turned off | twpmplC2.00, twpmplC2.a1, twpmplcbh1scottC2.c0, twpmplcbh1scottC2.c1, twpmplcmask1clothC2.c1, twpmplnor1campC2.c1, twpmplsmask1clothC2.c1 |
D020226.5 | TWP/MMCR/C2 - Intermittent missing data | twpmmcrcalC2.a1, twpmmcrmomentsC2.a1, twpmmcrmonC2.a1, twpmmcrpowC2.a1, twpmmcrmonC2.00, twpmmcrC2.00, twpmmcrmomentsC2.00, twpmmcrcalC2.00, twpmmcrpowC2.00 |
D051028.4 | TWP/MPL/C2 - Reprocess: Global metadata error | twpmplC2.a1 |
D060420.10 | TWP/MWR/C2 - software upgrade (version 3.29) | twpmwrlosC2.b1 |
D061121.1 | TWP/MWR/C2 - Missing Data | twpmwrlosC2.b1 |
D070515.3 | TWP/MPL/C2 - Reprocess: Incorrect longitude and altitude reported | twpmplC2.a1 |
D080415.1 | TWP/ARSCL/C2 - Bad MMCR data | twparscl1clothC2.c1, twparsclbnd1clothC2.c1, twpmmcrmode01v0071clothC2.c1, twpmmcrmode02v0041clothC2.c1, twpmmcrmode03v0051clothC2.c1, twpmmcrmode04v0041clothC2.c1 |
D100215.5 | TWP/VCEIL/C2 - Reprocess: Incorrect serial_number and sum_backscatter fields | twpvceil25kC2.b1 |
D120228.6 | TWP/MPLCMASK/C2 - Cloud layer metadata misleading | twp30smplcmask1zwangC2.c1 |
D990910.1 | Calibration interruption at TWP Nauru | twpvceil25kC2.a1, twpvceil25kC2.b1, twpvceil25kC2.00 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/06/1998 | 0000 | 07/30/1999 | 2359 |
Subject: | TWP/MWR/C2 - Uncertainty in clock time |
DataStreams: | twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | At ARCS2, the MWR computer clock was not being updated because no NTP time service software was installed on the computer. During Nauru99, on 6/24/99, the clock was found to be 3 minutes and 17 seconds fast. Assuming that the time was properly set at installation on 10/26/98 (which is not indicated in the installation report) and never reset until 6/24/99, the rate of time drift on the computer was about +0.8 seconds per day. However, if the time was not reset since integration at AIS on 1/14/98 (which is recorded in my integration notes), then the rate of drift is about +0.4 seconds per day. The computer was replaced and time service started on 7/30/99. |
Measurements: | twpmwrtipC2.a1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/20/1998 | 0000 | 02/03/1999 | 0000 |
Subject: | TWP/MPL/C2 - Power Oscillation |
DataStreams: | twpmplC2.a1 |
Description: | There is an oscillation that shows up in the reflected power and the power monitor. This oscillation shows up clearly whenever there is an absence of low (< ~5 km) clouds. Cloud return signals tend to be much larger than the level of this oscillation; however, it may introduce problems for studying aerosol distributions. The end date of this DQR is artificial in that this is as far as the QC went. |
Measurements: | twpmplC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/03/1999 | 0000 | 04/20/1999 | 1200 |
Subject: | TWP/C2/MPL Detector |
DataStreams: | twpmplcmask1clothC2.c1, twpmplnor1campC2.c1, twpmplsmask1clothC2.c1, twpmplC2.a1, twpmplC2.00 |
Description: | The MPL detector failed and was shut down. |
Measurements: | twpmplC2.a1:
twpmplC2.00:
twpmplsmask1clothC2.c1:
twpmplcmask1clothC2.c1:
twpmplnor1campC2.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/11/2000 | 0010 | 11/13/2000 | 2200 |
Subject: | TWP/MPL/C2 - Nauru MPL Laser Diode accidentally off |
DataStreams: | twpmplC2.a1 |
Description: | The emission from the laser diode supply was accidentally off. The Instrument Mentor, Connor Flynn, called Nauru directly and had them turn the laser emission back on. Backscatter and cloud base data during the period between 2000-11-11 00:00 GMT and 2000-11-13 22:00 GMT should be regarded as bad or incorrect while background light data and local temperature values are acceptable. |
Measurements: | twpmplC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/16/1999 | 0900 | 03/08/1999 | 2100 |
11/16/1999 | 0900 | 02/09/2000 | 2100 |
12/07/2000 | 0000 | 12/17/2000 | 2359 |
Subject: | TWP/MWR/C2 - Excessive wet_window flags |
DataStreams: | twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | The wet_window flag is set high more than expected from the measured value of liquid water path. This may be caused by dew or, if the heater sensivity is slightly misadjusted, by the diurnal variation in ambient temperature. The "wet_window" flag is an indicator of moisture on the MWR window which invalidates the measurements of precipitable water vapor and liquid water path. Sometimes this flag can be incorrectly set high or low if the heater sensivity is slightly misadjusted. The heater adjustment is a resistive device that is dependent on ambient temperature. Another indicator of moisture on the window is unreasonably high ( > 3*liquid_retrieval_rms_accuracy ) values of "liq". |
Measurements: | twpmwrtipC2.a1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/11/2000 | 0000 | 11/13/2000 | 2200 |
Subject: | TWP/MPL/C2 - Laser emission accidentally turned off |
DataStreams: | twpmplC2.00, twpmplC2.a1, twpmplcbh1scottC2.c0, twpmplcbh1scottC2.c1, twpmplcmask1clothC2.c1, twpmplnor1campC2.c1, twpmplsmask1clothC2.c1 |
Description: | Shortly after 00:00 GMT on 11/11/00, the MPL Energy Monitor value dropped abruptly to zero. At about 22:00 GMT on 11/13/00, the remote handset for the laser diode supply was used to turn the laser back on. |
Measurements: | twpmplC2.a1:
twpmplC2.00:
twpmplsmask1clothC2.c1:
twpmplcmask1clothC2.c1:
twpmplcbh1scottC2.c1:
twpmplnor1campC2.c1:
twpmplcbh1scottC2.c0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/13/2000 | 0000 | 06/07/2001 | 1520 |
Subject: | TWP/MMCR/C2 - Intermittent missing data |
DataStreams: | twpmmcrcalC2.a1, twpmmcrmomentsC2.a1, twpmmcrmonC2.a1, twpmmcrpowC2.a1, twpmmcrmonC2.00, twpmmcrC2.00, twpmmcrmomentsC2.00, twpmmcrcalC2.00, twpmmcrpowC2.00 |
Description: | During the time period identified in this DQR the MMCR was experiencing a variety of hardware problems that resulted in intermittent missing data. |
Measurements: | twpmmcrpowC2.00:
twpmmcrC2.00:
twpmmcrmomentsC2.00:
twpmmcrmonC2.00:
twpmmcrmonC2.a1:
twpmmcrmomentsC2.a1:
twpmmcrcalC2.a1:
twpmmcrcalC2.00:
twpmmcrpowC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/06/1998 | 0538 | 07/08/2003 | 0731 |
Subject: | TWP/MPL/C2 - Reprocess: Global metadata error |
DataStreams: | twpmplC2.a1 |
Description: | During the time period specified, the global metadata attribute "averaging_int" is reported as 30 seconds when the value for this attribute should be 60 seconds. |
Measurements: | twpmplC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/28/1998 | 0000 | 07/30/1999 | 1200 |
Subject: | TWP/MWR/C2 - software upgrade (version 3.29) |
DataStreams: | twpmwrlosC2.b1 |
Description: | The MWR operating program was upgraded to version 3.29 on 30 July 1999. This version included a beam width correction as well as provided the capability to automatically level the elevation mirror (that is, to automatically detect and correct offsets in the elevation angle stepper motor position.) The improvement in the quality of the tip curves resulting from the auto-leveling has been dramatic: differences in the brightness temperatures at 3 airmasses (19.5 and 160.5 degrees) have been reduced from +/- 5 K to +/- 0.5 K. In order to take full advantage of this improvement to detect and reject cloudy tip curves, the minimum value of the goodness-of-fit coefficient for a valid tip curve has been increased from 0.995 to 0.998. The data prior to July 30 1999 do not include beam-width and mirror-leveling corrections. |
Measurements: | twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/02/1998 | 2112 | 11/06/1998 | 2140 |
07/02/2000 | 2000 | 07/04/2000 | 0047 |
02/09/2002 | 2300 | 02/11/2002 | 2300 |
01/23/2004 | 1100 | 01/27/2004 | 1957 |
05/27/2005 | 1143 | 05/29/2005 | 2132 |
Subject: | TWP/MWR/C2 - Missing Data |
DataStreams: | twpmwrlosC2.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/06/1998 | 0000 | 12/01/2000 | 2359 |
Subject: | TWP/MPL/C2 - Reprocess: Incorrect longitude and altitude reported |
DataStreams: | twpmplC2.a1 |
Description: | The longitude of the MPL instrument is reported as -166.916. The correct longitude is +166.916. The altitude of the MPL instrument is reported as 7.2. The correct altitude is 7.1 M. These data will be reprocessed at a low priority. |
Measurements: | twpmplC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/20/1999 | 0000 | 12/29/1999 | 2359 |
Subject: | TWP/ARSCL/C2 - Bad MMCR data |
DataStreams: | twparscl1clothC2.c1, twparsclbnd1clothC2.c1, twpmmcrmode01v0071clothC2.c1, twpmmcrmode02v0041clothC2.c1, twpmmcrmode03v0051clothC2.c1, twpmmcrmode04v0041clothC2.c1 |
Description: | The MMCR was not operating properly during this period so the data should not have been used in determining cloud boundaries or radar moments. |
Measurements: | twparsclbnd1clothC2.c1:
twpmmcrmode01v0071clothC2.c1:
twparscl1clothC2.c1:
twpmmcrmode04v0041clothC2.c1:
twpmmcrmode02v0041clothC2.c1:
twpmmcrmode03v0051clothC2.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/28/1998 | 0000 | 10/31/2009 | 2359 |
Subject: | TWP/VCEIL/C2 - Reprocess: Incorrect serial_number and sum_backscatter fields |
DataStreams: | twpvceil25kC2.b1 |
Description: | Attribute serial_number: In most cases, this field is not representative of the actual serial number of the instrument because the value did not change when an instrument changed locations or was replaced with a spare. Variable sum_backscatter: An out-of-range condition for the "sum of detected and normalized backscatter" was reported as 0 instead of missing (-9999). The valid range is 0 - 0.0999 /srad. This DQR also applies to a1 level data. |
Measurements: | twpvceil25kC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/29/1998 | 0000 | 11/27/2006 | 2359 |
Subject: | TWP/MPLCMASK/C2 - Cloud layer metadata misleading |
DataStreams: | twp30smplcmask1zwangC2.c1 |
Description: | The comment in the header for cloud_base_layer indicates that a value of -1 indicates that no cloud is detected. For the specified time range, a value of 0 indicates that no cloud is detected. Values greater than zero indicate cloudy conditions, otherwise it is clear. |
Measurements: | twp30smplcmask1zwangC2.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/10/1999 | 0425 | 08/10/1999 | 0450 |
Subject: | Calibration interruption at TWP Nauru |
DataStreams: | twpvceil25kC2.a1, twpvceil25kC2.b1, twpvceil25kC2.00 |
Description: | The ceilometer was tipped horizontal for a calibration check |
Measurements: | twpvceil25kC2.b1:
twpvceil25kC2.00:
twpvceil25kC2.a1:
|