| 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. |
| Measurements: | nsa5mwravgC1.c1: - tbsky31_sdev
- tbsky23_sdev
- Total liquid water along LOS path(liq)
- ir_temp_sdev
- num_obs_irt
- liq_sdev
- num_obs
- Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
- Temperature, brightness, longwave(ir_temp)
- Total water vapor along LOS path(vap)
- water_flag_fraction
- vap_sdev
- 31.4 GHz sky brightness temperature(tbsky31)
nsamwrlosC1.a1: - bb31
- tnd_nom23
- 31.4 GHz sky brightness temperature(tbsky31)
- tnd23
- Total liquid water along LOS path(liq)
- Total water vapor along LOS path(vap)
- bbn31
- tkair
- tkxc
- sky23
- bb23
- tkbb
- sky31
- tnd31
- tc23
- tnd_nom31
- Temperature, brightness, longwave(ir_temp)
- Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
- tc31
- bbn23
- tknd
- wet_window
nsamwrlosC1.b1: - 31.4 GHz sky brightness temperature(tbsky31)
- Total water vapor along LOS path(vap)
- wet_window
- Total liquid water along LOS path(liq)
- Radiation, longwave, brightness temperature, 23.8 GHz(tbsky23)
- Temperature, brightness, longwave(ir_temp)
|