Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/17/2001 | 0600 | 01/22/2001 | 2145 | Suspect |
Subject: | NSA/MWR/C1 - Temperature Stabilization of Noise Diode Impaired |
DataStreams: | nsamwrlosC1.b1, nsa5mwravgC1.c1, nsamwrlosC1.a1 |
Description: | On 1/17 we had a big spike in the data and lost temperature stabilization. The instrument had problems maintaining the Noise Diode (ND) temperature since. At ambient temperatures under about -20 C the ND was not maintaining the set temperature of 30 C. This problem was reported in P010122.1. Fred Solheim recommended on 1/22 that we powercycle the instrument as it looked like the instrument CPU had lost the temperature reference. So we powercycled the instrument on 1/22 @ 20:30 and lost all comumnication to it; after a second powercycling the instrument came back on line and the temperature stabilized quickly (within a couple of minutes) to the set temperature (30 C) Fred Solheim reported after the system was restored: "I've never seen this behavior before. I don't think it was due to the RF deck physically hanging temperature, because the recorded temp dropped about 30 C in one observation cycle. If this happens again, send the MWR down along with data files for us to look at." Data collected in the periode 1/17/2001 6:00 to 1/22/2001 21:45 are questionable since it is uncertain whether the temperature really was unstable and what really caused the problem. |
Suggestions: | |
Measurements: | nsamwrlosC1.a1: more
nsa5mwravgC1.c1: more nsamwrlosC1.b1: more |