Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
07/19/1995 | 0000 | 12/18/1995 | 2359 | Suspect |
Subject: | Winds incorrect form 60 MHz Profiler |
DataStreams: | Dsgp50rwpwindC1.a2, Dsgp50rwptempC1.a1, Dsgp50rwptempC1.a0, Dsgp50rwptempC1.a2, Dsgp50rwpwindC1.a1, Dsgp50rwpwindC1.a0 |
Description: | DQR No: Platform: 50rwp Subject: Winds incorrect from 50 MHz profiler Date Submitted: 25 Sept 1995 Submitted By: Richard Coulter _x_ Instrument Mentor ___ EST Member _x_ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: What level data: (raw,a0,a1,b1,c1 etc):a0,a1,a2 What location was the data collected at: Central Facility Period of time in question Begin Date 7/19/95 Time 00:00 (GMT) End Date ??/??/?? Time ??:?? (GMT) Data should be labeled: ___ questionable ___ All data fields affected _x_ incorrect _x_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: Apparently the lightning strike on or about July 17 affected the 50 MHz rwp in its wind operation as well as the RASS. The v component of the wind is apparently not measured. It apparently uses a value from the u measure- ment. My best guess is that during the time that the profiler should be transmitting along the v direction, it is, in fact transmitting along the u direction. Since the measurements are not identical in time, the small differences lead to directions close to but not always identical to 225 and 45 deg (those to be expected if identical values are used for u and v). This fact led to some delay in discovering the problem (although the system was down for 3 weeks for repair of the RASS during this time). Vertical winds should be unaffected. RASS virtual temperatures should be unaffected. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Hardware fix necessary from vendor Data Processing Notes Date |
Suggestions: | |
Measurements: | Dsgp50rwpwindC1.a0: more
Dsgp50rwpwindC1.a2: more Dsgp50rwptempC1.a0: more Dsgp50rwpwindC1.a1: more Dsgp50rwptempC1.a2: more Dsgp50rwptempC1.a1: more |