DQR ID | Subject | Data Streams Affected |
---|---|---|
D041027.1 | NSA/MWRP/C1 - Missing data | nsamwrpC1.b1 |
D060419.5 | NSA/MWRP/C1 - Incorrect calibration | nsamwrpC1.b1 |
D060427.2 | NSA/MWRP/C1 - Bad calibration values | nsamwrpC1.00, nsamwrpC1.b1, nsamwrprawC1.00 |
D060717.4 | NSA/MWR/C1 - TKAIR sensor failure | nsamwrlosC1.b1 |
D060803.2 | NSA/SONDE/C1 - Noisy/Unstable RH and dew point data | nsasondewnpnC1.b1 |
D060811.1 | NSA/SONDE/C1 - Bad surface RH and temperature values | nsasondewnpnC1.b1 |
D060928.1 | NSA/SONDE/C1 - RH values offset due to error in ground check | nsasondewnpnC1.b1 |
D060928.4 | NSA/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry | nsasondewnpnC1.b1 |
D060929.2 | NSA/MWRP/C1 - Reprocessed: Re-calibration | nsamwrpC1.b1 |
D061011.1 | NSA/SONDE/C1 - Incorrect surface values of T and RH | nsasondewnpnC1.b1 |
D061114.1 | NSA/MWR/C1 - Rain sensor always on | nsamwrlosC1.b1, nsamwrtipC1.a1 |
D061114.3 | NSA/SONDE/C1 - RH sensor failure | nsasondewnpnC1.b1 |
D061205.3 | NSA/MWRP/C1 - Reprocessed: K-Band calibration drift | nsamwrpC1.b1 |
D070124.1 | NSA/SONDE/C1 - Incorrect surface RH value | nsasondewnpnC1.b1 |
D070209.1 | NSA/MWRP/C1 - Incorrect surface measurements | nsamwrpC1.b1 |
D070302.1 | NSA/SONDE/C1 - Temperature sensor broke at launch | nsasondewnpnC1.b1 |
D070416.3 | NSA/MWRP/C1 - Incorrect surface measurements | nsamwrpC1.b1 |
D070709.1 | NSA/MWRP/C1 - Reprocessed: 6-channel retrieval replaced by 5-channel retrieval | nsamwrpC1.b1 |
D080331.1 | NSA/MWRP/C1 - V-band Noise diode unstable | nsamwrpC1.b1 |
D080331.2 | NSA/MWRP/C1 - V-band Noise diode failure | nsamwrpC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/21/2004 | 0925 | 02/23/2004 | 2238 |
10/07/2004 | 0859 | 10/27/2004 | 1237 |
11/20/2004 | 0039 | 11/22/2004 | 1851 |
04/10/2005 | 0000 | 04/11/2005 | 1622 |
09/04/2005 | 0531 | 09/06/2005 | 1857 |
09/10/2005 | 0052 | 09/12/2005 | 1830 |
09/21/2005 | 1805 | 10/12/2005 | 2311 |
06/23/2006 | 1800 | 08/08/2006 | 2250 |
08/11/2006 | 2359 | 08/14/2006 | 1454 |
10/09/2006 | 2101 | 10/11/2006 | 1733 |
01/05/2007 | 2358 | 01/08/2007 | 2019 |
02/28/2007 | 2309 | 03/05/2007 | 0027 |
07/13/2007 | 1838 | 12/08/2007 | 0125 |
01/04/2008 | 2357 | 01/06/2008 | 1903 |
02/16/2008 | 1818 | 02/21/2008 | 0006 |
02/23/2008 | 1005 | 02/26/2008 | 2320 |
03/12/2008 | 0143 | 04/09/2008 | 1540 |
04/10/2008 | 1840 | 04/14/2008 | 1657 |
04/18/2008 | 2258 | 04/21/2008 | 1422 |
04/27/2008 | 1846 | 04/29/2008 | 0525 |
05/01/2008 | 0328 | 05/28/2008 | 2241 |
10/14/2008 | 1659 | 02/13/2009 | 2234 |
Subject: | NSA/MWRP/C1 - Missing data |
DataStreams: | nsamwrpC1.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | nsamwrpC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/12/2006 | 1800 | 04/13/2006 | 2000 |
Subject: | NSA/MWRP/C1 - Incorrect calibration |
DataStreams: | nsamwrpC1.b1 |
Description: | On 4/12 a calibration was attempted but the calibration was not successful. A new calibration was completed on 4/13 20:00 UTC. Data between the two calibration attempts are incorrect and should be disregarded. |
Measurements: | nsamwrpC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/26/2006 | 1930 | 04/27/2006 | 1530 |
Subject: | NSA/MWRP/C1 - Bad calibration values |
DataStreams: | nsamwrpC1.00, nsamwrpC1.b1, nsamwrprawC1.00 |
Description: | After calibration was completed on 4/26/2006 the last value in the V-band calibration file was corrupted. V-band data are wrong between 4/26 19:30 and 4/27 15:27 when the corrupted values were removed. |
Measurements: | nsamwrprawC1.00:
nsamwrpC1.b1:
nsamwrpC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/14/2006 | 0000 | 07/28/2006 | 0000 |
Subject: | NSA/MWR/C1 - TKAIR sensor failure |
DataStreams: | nsamwrlosC1.b1 |
Description: | Between 7/14 and 7/28 the tkair variable is missing most of the time and sometimes has large negative spikes. On 7/28, the sensor was cleaned of corrosion and the readings came back to normal. |
Measurements: | nsamwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/31/2006 | 0515 | 07/31/2006 | 0523 |
Subject: | NSA/SONDE/C1 - Noisy/Unstable RH and dew point data |
DataStreams: | nsasondewnpnC1.b1 |
Description: | The RH readings during the first 8 minutes of this sounding include three apparently incorrect oscillations to near-zero values. After checking the absolutely raw data, it seems as though this period was excessively noisy, resulting in many missing values. The noise abatted and the remaining sounding values are valid. |
Measurements: | nsasondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/30/2006 | 0522 | 07/30/2006 | 0523 |
08/01/2006 | 0520 | 08/01/2006 | 0521 |
08/04/2006 | 0532 | 08/04/2006 | 0533 |
08/06/2006 | 0528 | 08/06/2006 | 0529 |
08/08/2006 | 0517 | 08/08/2006 | 0518 |
08/09/2006 | 0527 | 08/09/2006 | 0528 |
08/11/2006 | 0525 | 08/11/2006 | 0526 |
08/15/2006 | 0534 | 08/15/2006 | 0535 |
08/17/2006 | 0535 | 08/17/2006 | 0536 |
08/18/2006 | 0516 | 08/18/2006 | 0517 |
08/19/2006 | 0538 | 08/19/2006 | 0539 |
08/19/2006 | 1745 | 08/19/2006 | 1746 |
08/20/2006 | 0532 | 08/20/2006 | 0533 |
08/20/2006 | 1729 | 08/20/2006 | 1730 |
08/21/2006 | 0530 | 08/21/2006 | 0531 |
08/22/2006 | 0524 | 08/22/2006 | 0525 |
Subject: | NSA/SONDE/C1 - Bad surface RH and temperature values |
DataStreams: | nsasondewnpnC1.b1 |
Description: | This is a subtle problem that might escape notice. For the identified sonde launches, the ground station lost its signal between the time it was removed from the ground check set and the time it was launched. As a result, the software, which automatically determines the launch time and surface conditions at time of launch mistakenly used values of temperature and RH representative of the ground check set and the GW rather than of the ambient conditions before launch. The bad values influenced only the first few samples and the remainder of the sounding values are correct. A procedural problem was identified and corrected. |
Measurements: | nsasondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/13/2006 | 0532 | 09/26/2006 | 2359 |
Subject: | NSA/SONDE/C1 - RH values offset due to error in ground check |
DataStreams: | nsasondewnpnC1.b1 |
Description: | Background: After installation of the latest software update , we began performing formal ground checks on RS92 radiosondes. By comparing the radiosonde readings with reference values in a controlled environment, the ground check is intended to ensure that the radiosonde sensors are in calibration before launch. The radisonde values during the ground check process are recorded automatically; the reference values are entered by the operator. If the radiosonde readings vary from the reference values, the system 'corrects' the radiosonde values. In the case of RH, the correction is applied as an offset (true RH = indicated RH + correction). Problem: Some operators misunderstood the ground-check procedure and entered the radiosonde values of RH rather than the reference value (assumed 0%RH), thus, some soundings done during this period have RH values that are different from what they would be if the ground check procedure had been done correctly. Consequence: Because the RH corrections generally are small (averaging about 0.5% RH) and the precision of the reported RH data during this time period is 1% RH, some values will not be affected at all; others will be off by about 1% RH (still within the stated accuracy of the sensor). Furthermore, because entering the radiosonde value as the reference value results in a near zero 'correction,' one may view these soundings as being done without the ground check correction. Also note that the dew point value will be suspect as well. I am attaching below a listing of the soundings that were affected during the indicated time period. Users can see the magnitude of the problem and choose whether or not to apply an offset in RH. Note that application of the offset to the processed RH data (in the netCDF file) will not have the same effect of applying the correction to the absolutely raw data (before processing), but the differences should be insignificant. Also note that the corrections for each sounding are included in the netCDF header information. These attributes are named 'humidity_correction' and 'humidity_correction_2'. The values of RH indicated by the radiosonde while it is in the ground check set are in attributes 'humidity_gc_sonde' and 'humidity_gc_sonde_2.' There is an RH reading for each of the two RH sensors used in the RS92 radiosonde. Here is the list - RH1 and RH2 are the radiosonde readings in the ground check set. Ref is the reference value entered by the operator. The correcte reference value should be 0%. To obtain an approximation to the RH value that would have been recorded if the ground check had been done properly, subtract the Ref value from the indicated RH. YYYYMMDD HHMM SerialNo RH1 RH2 Ref 20060713 0532 B1924431 0.30 0.20 0.30 20060713 1751 B1854963 0.20 0.30 0.30 20060714 0521 B1924425 0.40 0.40 0.40 20060714 1739 B1854206 0.30 0.30 0.30 20060715 0522 B1715127 1.20 1.20 1.20 20060715 1737 B1854966 0.60 0.60 0.60 20060716 0508 B1715126 0.40 0.40 0.40 20060716 1732 B1844098 0.50 0.50 0.50 20060717 0517 B1914170 0.40 0.40 0.40 20060718 0516 B1914173 0.70 0.70 0.70 20060720 0523 B1854149 0.40 0.40 0.40 20060721 0517 B1914153 0.40 0.40 0.40 20060722 0521 B1844097 1.00 1.10 1.10 20060722 1730 B1914174 0.60 0.70 0.70 20060723 0537 B1714439 0.40 0.40 0.40 20060723 1734 B1734155 0.50 0.50 0.50 20060724 0529 B1134336 0.50 0.50 0.50 20060725 0525 B1754099 0.60 0.70 0.70 20060726 0541 B1844108 1.80 1.80 1.80 20060727 0520 B1714382 0.70 0.80 0.70 20060728 0531 B1854116 0.80 0.80 0.80 20060729 0527 B1724027 1.00 1.00 1.00 20060729 1726 B1714392 0.70 0.80 0.80 20060730 0522 B1854100 0.70 0.80 0.80 20060730 1724 B1854764 0.90 1.00 1.00 20060731 0515 B1664086 0.90 0.80 0.90 20060801 0520 B1724758 1.50 1.50 1.50 20060801 1729 B1754116 1.10 1.10 1.10 20060802 0518 B1724516 0.80 0.80 0.80 20060803 0523 B1674148 0.80 0.80 0.80 20060804 0532 B1754092 0.90 0.90 0.90 20060804 1727 B1844117 3.50 3.50 3.50 20060805 0531 B1714741 0.30 0.30 0.30 20060805 1728 B1754098 0.30 0.30 0.30 20060806 0528 B1844115 0.40 0.40 0.40 20060806 1728 B1914161 0.20 0.20 0.20 20060807 0530 B1714549 0.30 0.30 0.30 20060808 0517 B1844107 0.50 0.50 0.50 20060808 1744 B1914166 0.20 0.20 0.20 20060809 0527 B1914164 0.30 0.40 0.40 20060809 1736 B1914163 0.30 0.30 0.30 20060810 0521 B1914160 0.40 0.50 0.50 20060810 1745 B1744671 0.40 0.40 0.40 20060811 0525 B1854965 0.50 0.50 0.50 20060811 1753 B1724131 0.10 0.10 0.10 20060812 0527 B1754104 0.50 0.50 0.50 20060812 1740 B1854256 0.30 0.40 0.40 20060813 0522 B1854240 0.30 0.40 0.40 20060814 0525 B1714106 0.20 0.20 0.20 20060814 1742 B1854106 0.40 0.40 0.40 20060815 0534 B1914169 0.50 0.60 0.60 20060815 1734 B1854233 0.60 0.70 0.70 20060816 0539 B1724791 0.20 0.20 0.20 20060816 1732 B1914171 0.10 0.20 0.20 20060817 0535 B1354283 0.10 0.10 0.10 20060817 1740 B1354574 0.40 0.40 0.40 20060818 0516 B1354633 0.50 0.40 0.50 20060818 1744 B1364673 0.20 0.20 0.20 20060819 0538 B1364126 0.20 0.30 0.30 20060819 1745 B1354598 0.50 0.60 0.60 20060820 0532 B1354290 1.10 1.10 1.10 20060820 1729 B1354317 0.40 0.40 0.40 20060821 0530 B1354545 0.60 0.70 0.70 20060821 1728 B1354516 0.70 0.70 0.70 20060822 0524 B1354619 0.50 0.60 0.60 20060822 1728 B1364377 0.40 0.40 0.40 20060823 0533 B1354309 0.30 0.30 0.30 20060823 1730 B1354527 0.70 0.70 0.70 20060824 0533 B1354230 0.60 0.60 0.60 20060824 1812 B1354587 0.70 0.70 0.70 20060825 0517 B1354614 0.70 0.70 0.70 20060825 1730 B1354630 0.60 0.60 0.60 20060826 0537 B1334114 0.90 0.90 0.90 20060826 1734 B1354246 0.70 0.70 0.70 20060827 0508 B1354534 0.70 0.70 0.70 20060827 1729 B1354618 0.60 0.60 0.60 20060828 0517 B1354115 0.40 0.40 0.40 20060828 1738 B1354206 0.50 0.60 0.60 20060829 0516 B1354617 0.50 0.60 0.60 20060829 1717 B1354622 0.50 0.60 0.60 20060830 0511 B1354314 0.40 0.50 0.50 20060830 1732 B1354537 0.60 0.70 0.70 20060831 1802 B1354239 0.60 0.80 0.80 20060905 1724 B1354626 0.60 0.60 0.60 20060906 0522 B1354525 0.60 0.80 0.80 20060906 1734 B1354107 0.50 0.50 0.50 20060907 0537 B1354543 0.70 0.70 0.70 20060907 1803 B1354586 0.80 0.80 0.80 20060908 0531 B1354519 0.60 0.60 0.60 20060908 1728 B1354224 0.60 0.60 0.60 20060909 0534 B1354532 0.70 0.80 0.80 20060909 1732 B1354513 0.80 0.90 0.90 20060910 0516 B1354125 0.60 0.70 0.60 20060910 1727 B1354110 0.40 0.50 0.50 20060911 0528 B1354235 0.90 0.90 0.90 20060911 1849 B1354514 0.70 0.70 0.70 20060912 0525 B1354124 0.60 0.70 0.70 20060913 0534 B1344478 0.50 0.50 0.50 20060914 0520 B1354226 0.70 0.70 0.70 20060915 0529 B1344459 0.40 0.50 0.50 20060916 0532 B1344469 0.50 0.40 0.50 20060916 1732 B1354106 0.50 0.60 0.60 20060917 0527 B1354210 0.70 0.70 0.70 20060918 0533 B1354087 0.60 0.60 0.60 20060919 0526 B1354097 0.70 0.50 0.60 20060920 0516 B1344462 0.50 0.40 0.50 20060920 1810 B1354536 0.70 0.70 0.70 20060921 0534 B1354112 0.50 0.60 0.60 20060921 1800 B1344502 0.40 0.40 0.40 20060922 0525 B1354531 0.70 0.80 0.80 20060922 1736 B1354541 0.70 0.70 0.70 20060923 0519 B1354101 0.50 0.60 0.60 20060923 1738 B1354576 0.70 0.50 0.70 20060924 0536 B1354095 0.60 0.60 0.60 20060925 0536 B1354098 0.60 0.60 0.60 20060925 1755 B1354100 0.50 0.50 0.50 20060926 0531 B1334691 0.70 0.70 0.70 20060926 1742 B1354108 0.40 0.50 0.50 |
Measurements: | nsasondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/29/2006 | 0500 | 12/31/9999 | 2359 |
Subject: | NSA/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry |
DataStreams: | nsasondewnpnC1.b1 |
Description: | The output precision of the following variables was increased 20060929: alt changed from 1m to 0.1m dp changed from 0.1degC to 0.01degC pres changed from 0.1 hPa to 0.01 hPa RH changed from 1%RH to 0.01%RH tdry changed from .1degC to 0.01degC Note that the increase in precision does not necessarily imply an increase in accuracy. Users are cautioned to continue to use their best scientific judgement when using these or any other data. |
Measurements: | nsasondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/08/2006 | 2200 | 09/06/2006 | 2150 |
Subject: | NSA/MWRP/C1 - Reprocessed: Re-calibration |
DataStreams: | nsamwrpC1.b1 |
Description: | After being re-installed the radiometer was calibrated with liquid nitrogen. Data between 8/8 and 9/6 have been reprocessed to apply the revised calibrations. |
Measurements: | nsamwrpC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/07/2006 | 0524 | 10/07/2006 | 0525 |
Subject: | NSA/SONDE/C1 - Incorrect surface values of T and RH |
DataStreams: | nsasondewnpnC1.b1 |
Description: | The radiosonde was launched too quickly after being removed from the ground check set. As a result, the system did not equilibrate with the local ground conditions and the automatically entered surface values are incorrect. |
Measurements: | nsasondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/05/2006 | 1100 | 10/23/2006 | 1600 |
Subject: | NSA/MWR/C1 - Rain sensor always on |
DataStreams: | nsamwrlosC1.b1, nsamwrtipC1.a1 |
Description: | The rain sensor was always on between 10/5 and 10/23 2006. The user should be aware that not all data flagged as rainy are actually rainy. The problem was caused by a shift in the sensitivity of the rain sensor and was corrected by changing the sensor threshold in the configuration file. |
Measurements: | nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/28/2006 | 0532 | 10/28/2006 | 0710 |
Subject: | NSA/SONDE/C1 - RH sensor failure |
DataStreams: | nsasondewnpnC1.b1 |
Description: | It appears that one of the two RH sensors on this radiosonde was affected by ice after emerging from a low cold cloud. As a result the reported RH values oscillate by about 10 percent until the alternate heating cycle stops. I suspect the lower value is more close to correct, but can't be absolutely sure. |
Measurements: | nsasondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2006 | 0000 | 11/27/2006 | 2100 |
Subject: | NSA/MWRP/C1 - Reprocessed: K-Band calibration drift |
DataStreams: | nsamwrpC1.b1 |
Description: | At the beginning of November, the K-band channel calibration started to drift. The MWRP brightness temperatures were about 1.5 K higher than the MWR-measured brightness temperatures. By the half of the month the differences were more than 2 K to become about 4 K by the end of November. On Nov 27 new calibration coefficients were derived and uploaded. Data for 20061101-20061127 have been reprocessed with the revised calibrations and are available from the ARM Archive effective January 2007. |
Measurements: | nsamwrpC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/29/2006 | 0517 | 12/29/2006 | 0518 |
Subject: | NSA/SONDE/C1 - Incorrect surface RH value |
DataStreams: | nsasondewnpnC1.b1 |
Description: | For an unknown reason the surface RH was reported a 0%. Becuase these values are entered automatically by the system, this is NOT likely an operator error. Examination of the raw data shows that the surface RH at launch time was approximately 81.2 %RH. |
Measurements: | nsasondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/08/2007 | 0400 | 02/13/2007 | 1700 |
Subject: | NSA/MWRP/C1 - Incorrect surface measurements |
DataStreams: | nsamwrpC1.b1 |
Description: | Surface measurements are spiking and not comparing well with the co-located METTWR measurements. On 2/13 site operators cleaned a filter in the heater housing resolving the problem. |
Measurements: | nsamwrpC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/27/2007 | 1955 | 02/27/2007 | 2131 |
Subject: | NSA/SONDE/C1 - Temperature sensor broke at launch |
DataStreams: | nsasondewnpnC1.b1 |
Description: | The temperature sensor on this sonde broke at launch. As a result all the thermodynamic data are incorrect. The wind data are OK, though there will be some uncertainty in the altitude values. This sounding was done at a non-standard time and it isn't clear whether it was delayed for some reason or a RHUBC sounding. In either case, there is no fix. |
Measurements: | nsasondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/28/2007 | 0000 | 03/29/2007 | 2300 |
Subject: | NSA/MWRP/C1 - Incorrect surface measurements |
DataStreams: | nsamwrpC1.b1 |
Description: | The MWRP surface temperature and pressure readings were in disagreement with those from other instruments. The possible cause of the disagreement was ice buildup around the sensors. Readings returned to normal March 29. The temperature readings were more affected. Since the readings are erratic, with large oscillations, it is not possible to correct them. Disregard the surface temperature and humidity readings during this time. The wrong readings will affect the first layer of the temperature and humidity profiles as well. |
Measurements: | nsamwrpC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/19/2004 | 0214 | 06/02/2007 | 2359 |
Subject: | NSA/MWRP/C1 - Reprocessed: 6-channel retrieval replaced by 5-channel retrieval |
DataStreams: | nsamwrpC1.b1 |
Description: | Due to repeated failure of the V-band receiver and calibration problems, the 6-channel retrieval was retired and a new 5-channel retrieval which uses only the K-band channels was implemented. All data previously processed with the 6-channel retrieval have been reprocessed. Please note that the 7 channels (brightness temperatures) in the V-band range (51 to 60 GHz) should not be used. See D080331.1 and D080331.2. |
Measurements: | nsamwrpC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/01/2007 | 0000 | 03/15/2007 | 2300 |
Subject: | NSA/MWRP/C1 - V-band Noise diode unstable |
DataStreams: | nsamwrpC1.b1 |
Description: | Sometimes between Jan and March 2007 the V-band noise diode started to be unstable. V-band channels during this period show large discrepancies with model computations. The problem was evident during the month of January. During February and March the problem was less visible, however measurement model comparisons show an increased bias. The instrument was calibrated with LN2 on March 15 and the calibration results showed a large drift in the calibration parameters. The hardware failure will have consequences in the retrievals of temperature and relative humidity profiles. It is difficult to establish when the failure started. Disregard the V-band channels during this period. Vertical profiles of temperature and humidity are affected as well. Please note that this DQR only covers the 7 channels (brightness temperatures) in the V-band range (51 to 60 GHz). The 5 K-band channels (20-31 GHz) are not affected. |
Measurements: | nsamwrpC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/15/2007 | 1900 | 07/13/2007 | 1900 |
Subject: | NSA/MWRP/C1 - V-band Noise diode failure |
DataStreams: | nsamwrpC1.b1 |
Description: | The LN2 calibration on 3/15 showed a large drift of the V-band calibration parameters. The radiometer was calibrated again in June and was sent out for repairs in July 2007. Between 3/15 and 7/13 2007 the V-band data are incorrect and should be disregarded. The failure affects the retrieved vertical profiles of temperature and humidity as well. Please note that the hardware failure affected the 7 V-band channels only (51-60 GHz). Channels in the frequency range between 20 and 30 GHz are not affected. Integrated liquid water (LWP) and water vapor (PWV) are not affected since they use K-band channels only. |
Measurements: | nsamwrpC1.b1:
|