DQRID : D960422.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/13/1996060504/13/19961801Incorrect
04/12/1996091704/12/19961858Incorrect
04/09/1996133704/09/19961834Incorrect
04/10/1996062504/10/19961823Incorrect
04/11/1996114904/11/19961649Incorrect
more
Subject:
SGP/MWR/C1 - Radio Frequency Interference during IOP
DataStreams:sgpmwrlosC1.b1, sgp5mwravgC1.c1, sgpmwrlosC1.a1
Description:
During the specified times a strong, continuous signal was 
measured by the 31.4 GHz of the MWR.  The signal was present
in all 31.4 GHz measurements including the sky measurement,
the internal reference target measurement, and the measurement
of the internal noise injection source from which the
instantaneous instrument gain is computed.

The source of the interference has not yet been identified.

Because the gain is computed using the difference of the
noise injection and target measurements, and because the
sky brightness temperature is computed relative to the
internal target temperature, the data appear anomalous
only for a period of an hour after the interference starts
and ends.  This is due to the low pass filter applied to
the instantaneous gain.  However the data should be
considered invalid or at least questionable during the
entire period for which the interference was present.
Suggestions: 
Measurements:sgp5mwravgC1.c1:
  • ir_temp_sdev
  • liq
  • time_offset
  • water_flag
  • num_obs
  • num_obs_irt
  • lat
  • tbsky31
  • vap
  • alt
  • tbsky31_sdev
  • base_time
  • tbsky23
  • water_flag_fraction
  • ir_temp
  • prob_outlier
  • prob_slope_change
  • 31tbsky
  • 23tbsky
  • prob_level_change
  • tbsky23_sdev
  • vap_sdev
  • number_obs_averaged
  • liq_sdev
  • lon
more
sgpmwrlosC1.a1:
  • sky23
  • lon
  • tbsky23
  • wet_window
  • tknd
  • alt
  • vap
  • tnd_nom23
  • lat
  • sky_ir_temp
  • liq
  • sky31
  • tc31
  • bbn23
  • tnd_nom31
  • base_time
  • bb23
  • tkbb
  • tnd31
  • time_offset
  • tc23
  • bbn31
  • tkxc
  • tbsky31
  • bb31
  • tnd23
  • tkair
more
sgpmwrlosC1.b1:
  • sky23
  • tc23
  • wet_window
  • tkbb
  • tnd_nom31
  • base_time
  • tc31
  • tbsky31
  • time_offset
  • bbn31
  • lon
  • tnd_nom23
  • tkxc
  • tbsky23
  • tnd23
  • sky_ir_temp
  • bbn23
  • tkair
  • vap
  • alt
  • bb31
  • liq
  • tnd31
  • lat
  • bb23
  • tknd
  • sky31
more

Close this window