Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
07/31/2002 | 2034 | 11/05/2002 | 1815 | Does not affect quality |
Subject: | SGP/MWR/B4/C1 - LOS cycle skipping |
DataStreams: | sgpmwrlosB4.a1, sgpmwrlosC1.a1, sgpmwrlosB4.b1, sgpmwrlosC1.b1 |
Description: | When MWR software version 4.12 was installed at the SGP, it was observed that the MWRs at CF and BF4 skip line-of-sight (LOS) observing cycles. In LOS mode, the software begins an observing cycle at 0, 20, and 40 seconds after the minute to provide 3 LOS cycles per minute. If a cycle is delayed so that it takes more than 20 seconds to complete, then the next start time is missed, the cycle is skipped, and the data that would have been acquired are lost. It was demonstrated that the interaction with the IRT at CF slowed the MWR observing cycle noticeably and contributed significantly to the LOS cycle skipping. The IRT was removed from the MWR on 5 November 2002 and the LOS cycle skipping at the CF was resolved. The IRT data are now available in a new separate datastream: sgpirtC1.a1 (and soon sgpirt2sC1.a1). The BF4 cycle skipping may have resulted from a combination of an additional air temperature sensor on this instrument and the use of a fiber optic cable. However, the cycle skipping on this instrument appears to have abated without modifications to the instrument configuration. |
Suggestions: | |
Measurements: | sgpmwrlosB4.a1: more
sgpmwrlosC1.a1: more sgpmwrlosB4.b1: more sgpmwrlosC1.b1: more |