DQR ID: D011207.3 DQR SUBMITTER: Barry Lesht DATE SUBMITTED: 12-07-2001 DQR SUBJECT: SGP/SONDE/C1 - Bad temp (other?) data in 12/3/01:2328 sounding SUGGESTIONS: None QUALITY COLOR: Red - Incorrect PRB REVIEWED: Y ---------------------------------------- DQR DESCRIPTION: It looks as though the temperature sensor was damaged on launch. The recorded temp goes from 16.4 at the surface to -42.6 at 2 seconds into the flight. The temperature never exceeds -42 though the RH and pressure look reasonable, but probably should be considered questionable. ---------------------------------------- DQR DATASTREAM(S): sgpsondeC1.00 Raw data stream - documentation not supported sgpsondewnpnC1.00 Raw data stream - documentation not supported sgpsondewnpnC1.a1 dp rh tdry sgpsondewnpnC1.b1 dp rh tdry START DATE/TIME: 12/03/2001 23:28 GMT END DATE/TIME:12/04/2001 01:58 GMT ---------------------------------------- LINK(S): none
DQR ID: D011231.1 DQR SUBMITTER: Barry Lesht DATE SUBMITTED: 12-31-2001 DQR SUBJECT: SGP/SONDE/C1 - Bad temperature in CF sounding 12/22/01:0527 SUGGESTIONS: QUALITY COLOR: Red - Incorrect PRB REVIEWED: Y ---------------------------------------- DQR DESCRIPTION: The temperature data in this sounding look bad after the first value. The temperature series is 11.4, 2.6, -14.3, -32.4 in the first 6 seconds of flight. I don't know why this occurred, but it obviously is incorrect. The pressure and RH data look reasonable. ---------------------------------------- DQR DATASTREAM(S): sgpsondewnpnC1.a1 dp tdry sgpsondewnpnC1.b1 dp tdry START DATE/TIME: 12/22/2001 05:27 GMT END DATE/TIME:12/22/2001 06:59 GMT ---------------------------------------- LINK(S): none
DQR ID: D011231.2 DQR SUBMITTER: Barry Lesht DATE SUBMITTED: 12-31-2001 DQR SUBJECT: SGP/SONDE/C1 - Bad temperature data CF sounding 12/28/01:2326 SUGGESTIONS: QUALITY COLOR: Red - Incorrect PRB REVIEWED: Y ---------------------------------------- DQR DESCRIPTION: The temperature data in this sounding are bad from approximately 16 seconds into the flight. The temperature series is 9.9, 10.8, 11.3, 1.5, 11.6, 11.6, 11.6, -32.2 and remains below -30 degC. I don't know why this occurred, but it clearly is incorrect. The pressure data looks OK as does the RH, though the RH data are missing (probably sensor failure) above roughly 3.5 km. ---------------------------------------- DQR DATASTREAM(S): sgpsondewnpnC1.a1 dp tdry sgpsondewnpnC1.b1 dp tdry START DATE/TIME: 12/28/2001 23:26 GMT END DATE/TIME:12/29/2001 00:45 GMT ---------------------------------------- LINK(S): none
DQR ID: D990124.2 DQR SUBMITTER: Barry Lesht DATE SUBMITTED: 07-08-2002 DQR SUBJECT: SGP/SONDE - Dry bias in sonde RH SUGGESTIONS: When the final algorithm is available, ARM sounding data should be reprocessed to obtain corrected RH data. A new data stream will be required. QUALITY COLOR: Yellow - Suspect PRB REVIEWED: Y ---------------------------------------- DQR DESCRIPTION: Vaisala has confirmed ARM findings of an apparent dry bias in the relative humidity measured by RS-80H radiosondes. The cause of the dry bias is thought to be contamination of the humidity sensor by volatile organic substances originating from some plastic parts of the radiosonde. The amount of contamination is a function of the time between the date of sonde manufacture and its use. All RS-80H sondes manufactured before week 34 of 1998 will show this bias. After week 34 of 1998 Vaisala changed its packaging to reduce, but not eliminate the contamination problem. Starting with RS-80 radiosonde manufactured in late June 2000 Vaisala enclosed the sensor boom in an inert plastic shield, thereby eliminating the contamination that caused the dry bias. Starting in May 2001 at the SGP, May 2002 at the TWP, and later 2002 at the NSA, ARM has moved to using RS-90 radiosondes. These sondes are not subject to the contaminatino that caused the dry bias. Vaisala is in the process of developing an algorithm that can be used to estimate the correct RH from knowledge of the sonde age. All of the ARM sounding data have sufficient metadata available to apply the correction. Additionally, ARM has funded a Science Team effort (Milosevich) to develop a 'best' correction algorithm for the RS-80 radiosonde humidity data. When completed this algorithm will allow us to reprocess the accumulated RS-80 data and produce a new data platform with what we hope will be more accurate data. ---------------------------------------- DQR DATASTREAM(S): DsgpsondeB1.00 Development raw data stream - documentation not supported DsgpsondeB1.a0 Development data stream - documentation not supported DsgpsondeB1.a1 Development data stream - documentation not supported DsgpsondeB4.00 Development raw data stream - documentation not supported DsgpsondeB4.a0 Development data stream - documentation not supported DsgpsondeB4.a1 Development data stream - documentation not supported DsgpsondeB5.00 Development raw data stream - documentation not supported DsgpsondeB5.a0 Development data stream - documentation not supported DsgpsondeB5.a1 Development data stream - documentation not supported DsgpsondeC1.00 Development raw data stream - documentation not supported DsgpsondeC1.a0 Development data stream - documentation not supported DsgpsondeC1.a1 Development data stream - documentation not supported DsgpsondenogcptucalcB1.c1 Development data stream - documentation not supported DsgpsondenogcptucalcB4.c1 Development data stream - documentation not supported DsgpsondenogcptucalcB5.c1 Development data stream - documentation not supported DsgpsondenogcptucalcC1.c1 Development data stream - documentation not supported DsgpsondenogcwrpnB1.c1 Development data stream - documentation not supported DsgpsondenogcwrpnB4.c1 Development data stream - documentation not supported DsgpsondenogcwrpnB5.c1 Development data stream - documentation not supported DsgpsondenogcwrpnC1.c1 Development data stream - documentation not supported DsgpsondeptuB1.00 Development raw data stream - documentation not supported DsgpsondeptuB4.00 Development raw data stream - documentation not supported DsgpsondeptuB5.00 Development raw data stream - documentation not supported DsgpsondeptuB6.00 Development raw data stream - documentation not supported DsgpsondeptuC1.00 Development raw data stream - documentation not supported DsgpsondeptucalcB1.c1 Development data stream - documentation not supported DsgpsondeptucalcB4.c1 Development data stream - documentation not supported DsgpsondeptucalcB5.c1 Development data stream - documentation not supported DsgpsondeptucalcC1.c1 Development data stream - documentation not supported sgpsondeB1.00 Raw data stream - documentation not supported sgpsondeB1.a0 dp rh sgpsondeB1.a1 dp rh sgpsondeB4.00 Raw data stream - documentation not supported sgpsondeB4.a0 dp rh sgpsondeB4.a1 dp rh sgpsondeB5.00 Raw data stream - documentation not supported sgpsondeB5.a0 dp rh sgpsondeB5.a1 dp rh sgpsondeB6.00 Raw data stream - documentation not supported sgpsondeC1.00 Raw data stream - documentation not supported sgpsondeC1.a0 dp rh sgpsondeC1.a1 dp rh sgpsondeptuC1.00 Raw data stream - documentation not supported sgpsondewnpnB1.a0 dp rh sgpsondewnpnB1.a1 dp rh sgpsondewnpnB4.a0 dp rh sgpsondewnpnB4.a1 dp rh sgpsondewnpnB5.a0 dp rh sgpsondewnpnB5.a1 dp rh sgpsondewnpnB6.a0 dp rh sgpsondewnpnB6.a1 dp rh sgpsondewnpnC1.a0 dp rh sgpsondewnpnC1.a1 dp rh sgpsondewnprC1.a0 dp rh sgpsondewnprC1.a1 dp rh sgpsondewrpnB1.00 Raw data stream - documentation not supported sgpsondewrpnB1.a0 dp rh sgpsondewrpnB1.a1 dp rh sgpsondewrpnB4.00 Raw data stream - documentation not supported sgpsondewrpnB4.a0 dp rh sgpsondewrpnB4.a1 dp rh sgpsondewrpnB5.00 Raw data stream - documentation not supported sgpsondewrpnB5.a0 dp rh sgpsondewrpnB5.a1 dp rh sgpsondewrpnB6.00 Raw data stream - documentation not supported sgpsondewrpnB6.a0 dp rh sgpsondewrpnB6.a1 dp rh sgpsondewrpnC1.00 Raw data stream - documentation not supported sgpsondewrpnC1.a0 dp rh sgpsondewrpnC1.a1 dp rh sgpsondewrprB1.00 Raw data stream - documentation not supported sgpsondewrprB1.a0 dp rh sgpsondewrprB1.a1 dp rh sgpsondewrprB4.00 Raw data stream - documentation not supported sgpsondewrprB4.a0 dp rh sgpsondewrprB4.a1 dp rh sgpsondewrprB5.00 Raw data stream - documentation not supported sgpsondewrprB5.a0 dp rh sgpsondewrprB5.a1 dp rh sgpsondewrprC1.00 Raw data stream - documentation not supported sgpsondewrprC1.a0 dp rh sgpsondewrprC1.a1 dp rh START DATE/TIME: 05/27/1992 00:00 GMT END DATE/TIME:05/31/2002 23:59 GMT ---------------------------------------- LINK(S): PIF ID: P990129.5 - SGP/SONDE - Dry bias in sonde RH (many facilities)