Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
02/12/1998 | 0000 | 05/01/1998 | 0000 | Suspect |
Subject: | TWP/QCRAD/C1 - Spikes in temperature data |
DataStreams: | twpqcrad1longC1.s1, twpqcrad1longC1.c1, twpqcrad1longC1.s2, twpqcrad1longC1.c2 |
Description: | Beginning on 980212 (day #43) spikes began to occur in the surface temperature and water vapor pressure. These spikes occur approximately once per hour (the spacing is very regular but occasionally an hour is skipped). In the one-minute averaged data, the temperature spike lasts for only one minute and dips approximately 4-5 C below the actual temperature. The one-minute standard deviation is more dramatic, rising from about 0.1 to about 35. The one minute temperature minimum is the most easily identifiable, each hour when the spike occurs, the minimum is -245.84. The vapor pressure mean jumps from about 30 to over 50 and the standard deviation jumps from less than 1 to more than 200. This problem was fixed by the RESET team on 980501. Air temperature data is needed for tests on LW up and LW down pyrgeometer case and dome temperatures, and tests on the irradiances from upwelling LW/SW and downwelling LW. Problem documented in instrument DQR D000718.11 |
Suggestions: | Use caution with upwelling LW/SW and downwelling LW because not all checks can be performed on data. |
Measurements: | twpqcrad1longC1.s1: more
twpqcrad1longC1.c1: more twpqcrad1longC1.c2: more twpqcrad1longC1.s2: more |