DQRID : D130717.4
Start DateStart TimeEnd DateEnd Time
04/29/2013190007/08/20131900
more
Subject:
SGP/KAZR/C1 - Transmitter failure
DataStreams:sgpkazrauxC1.a0, sgpkazrmdC1.a1, sgpkazrspeccmaskmdcopolC1.a0,
sgpkazrspeccmaskgecopolC1.a0, sgpkazrgeC1.a1, sgpkazrspeccmaskmdxpolC1.a0, sgpkazrspeccmaskgexpolC1.a0
Description:
KAZR TWTA failure.  Power started dropping on 2013.04.30 and by 2013.05.09 it was down to 
approximately 4 watts.  Data are not useable during this period.
Suggestions: 
Measurements:sgpkazrspeccmaskmdxpolC1.a0:
  • Spectra(spectra)
  • Locator Mask for Spectra(locator_mask)
  • Spectral velocity bins(velocity_bins)
  • Distance to the center of the corresponding range bin(range)
more
sgpkazrgeC1.a1:
  • Mean doppler velocity, copolar, dealiased(mean_doppler_velocity_copol)
  • Radar calibration constant, copolar(cal_constant_copol)
  • Hot noise, cross-polar(hot_noise_xpol)
  • Signal to noise ratio, cross-polarization(signal_to_noise_ratio_xpol)
  • Radar calibration constant, cross-polar(cal_constant_xpol)
  • Spectral width, co-polarization(spectral_width_copol)
  • Sky noise, copolar(sky_noise_copol)
  • Spectral width, cross-polarization(spectral_width_xpol)
  • Cold noise, copolar(cold_noise_copol)
  • Signal-to-noise ratio, copolar(signal_to_noise_ratio_copol)
  • Mean doppler velocity, cross-polar(mean_doppler_velocity_xpol)
  • Receiver noise(rx_noise)
  • Cold noise, cross-polarization(cold_noise_xpol)
  • Distance to the center of the corresponding range bin(range)
  • Reflectivity, cross-polar(reflectivity_xpol)
  • Sky noise, cross-polarization(sky_noise_xpol)
  • Reflectivity, copolar(reflectivity_copol)
  • Hot noise, co-polarization(hot_noise_copol)
more
sgpkazrspeccmaskgecopolC1.a0:
  • Signal-to-noise ratio(signal_to_noise_ratio)
  • Doppler spectrum width (second moment of the doppler spectrum)(spectral_width)
  • Mean doppler velocity(mean_doppler_velocity)
  • Spectral velocity bins(velocity_bins)
  • Spectra(spectra)
  • Distance to the center of the corresponding range bin(range)
  • Locator Mask for Spectra(locator_mask)
  • reflectivity(reflectivity)
more
sgpkazrspeccmaskgexpolC1.a0:
  • Spectra(spectra)
  • reflectivity(reflectivity)
  • Distance to the center of the corresponding range bin(range)
  • Locator Mask for Spectra(locator_mask)
  • Signal-to-noise ratio(signal_to_noise_ratio)
  • Spectral velocity bins(velocity_bins)
  • Doppler spectrum width (second moment of the doppler spectrum)(spectral_width)
  • Mean doppler velocity(mean_doppler_velocity)
more
sgpkazrauxC1.a0:
  • DC power supply temperature(temp_power_supply)
  • +12 V power supply voltage(input_12V)
  • Radar calibration constant, channel 1, cross-polar(cal_constant_ch1_xpol)
  • LNA temperature(temp_lna)
  • Radar calibration constant, channel 2, copolar(cal_constant_ch2_copol)
  • +28 V power supply voltage on radar control board(power_supply_28V)
  • Status of the TWTA monitored values.(twta_status_is_valid)
  • Transmit power(tx_power)
  • +5.2 V power supply voltage on radar control board(power_supply_5p2V)
  • +5 V power supply voltage on radar control board(power_supply_5V)
  • Lock alarms for 1620 MHz oscillator.(lock_alarm_1620)
  • Voltage reported by the TWTA collector.(collector_voltage)
  • Component plate temperature(temp_component_plate)
  • Outside air temperature(temp_outside_air)
  • KAZR timing mode(timing_mode)
  • +5 V power supply voltage(input_5V)
  • Physical temperature of noise diode(temp_noise_diode)
  • Instrument fault flags(fault_flags)
  • Radar calibration constant, channel 2, cross-polar(cal_constant_ch2_xpol)
  • Relative humidity measured by sensor on radar control board(rh_local)
  • +15 V power supply voltage(input_15V)
  • Reverse power termination temperature(temp_reverse_power)
  • Time of last detected TWTA fault.(twta_latest_fault_time_epoch)
  • Temperature measured by sensor on radar control board(temp_local)
  • KAZR processing mode(processing_mode)
  • Taper factor added to fast fourier transform.(fft_taper_type)
  • Antenna feedhorn temperature(temp_antenna_feedhorn)
  • Current reported by the TWTA helix.(helix_current)
  • -5 V power supply voltage(input_minus5V)
  • Lock alarms for 16560 MHz oscillator.(lock_alarm_16560)
  • Radar calibration constant, channel 1, copolar(cal_constant_ch1_copol)
  • Heater filament voltage, inside the TWTA.(filament_voltage)
  • Antenna relative humidity(rh_antenna)
  • RF detector temperature(temp_rf_detector)
  • On/Off state(is_powered_on)
  • Lock alarms for 120 MHz oscillator.(lock_alarm_120)
  • Noise source, channel 2(noise_source_ch2)
  • Noise source, channel 1(noise_source_ch1)
  • Lock alarms for 360 MHz oscillator.(lock_alarm_360)
  • Voltage reported by the TWTA cathode.(cathode_voltage)
  • Receiver noise, channel 2(rx_noise_ch2)
  • Receiver noise, channel 1(rx_noise_ch1)
  • Receiver gain, channel 1(rx_gain_ch1)
  • Receiver gain, channel 2(rx_gain_ch2)
  • Antenna temperature(temp_antenna)
  • 4-port circulator temperature(temp_circulator)
  • Remote control enabled (0/1)(remote_control_enabled)
  • TWTA status state(twta_status_state)
  • +8 V power supply voltage(input_8V)
more
sgpkazrmdC1.a1:
  • Sky noise, cross-polarization(sky_noise_xpol)
  • Reflectivity, cross-polar(reflectivity_xpol)
  • Reflectivity, copolar(reflectivity_copol)
  • Spectral width, cross-polarization(spectral_width_xpol)
  • Receiver noise(rx_noise)
  • Cold noise, cross-polarization(cold_noise_xpol)
  • Hot noise, co-polarization(hot_noise_copol)
  • Cold noise, copolar(cold_noise_copol)
  • Radar calibration constant, cross-polar(cal_constant_xpol)
  • Mean doppler velocity, copolar, dealiased(mean_doppler_velocity_copol)
  • Sky noise, copolar(sky_noise_copol)
  • Signal to noise ratio, cross-polarization(signal_to_noise_ratio_xpol)
  • Hot noise, cross-polar(hot_noise_xpol)
  • Radar calibration constant, copolar(cal_constant_copol)
  • Mean doppler velocity, cross-polar(mean_doppler_velocity_xpol)
  • Spectral width, co-polarization(spectral_width_copol)
  • Distance to the center of the corresponding range bin(range)
  • Signal-to-noise ratio, copolar(signal_to_noise_ratio_copol)
more
sgpkazrspeccmaskmdcopolC1.a0:
  • Locator Mask for Spectra(locator_mask)
  • Spectra(spectra)
  • Spectral velocity bins(velocity_bins)
  • Distance to the center of the corresponding range bin(range)
more

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