| Subject: | ASI/WSACR/M1 - Incorrect calibration parameters, SNR, and unambiguous range |
| DataStreams: | asiwsacrcrrhiM1.a1, asiwsacrhsrhiM1.a1, asiwsacrblrhiM1.a1, asiwsacrcrrasterM1.a1,
asiwsacrcwrhiM1.a1, asiwsacrawrhiM1.a1, asiwsacrppiM1.a1, asiwsacrrhiM1.a1, asiwsacrvptM1.a1,
asiwsacrcrcalM1.a1, asiwsacrslrM1.a1
|
| Description: | Calibration parameters (r_calib_ and radar_), such as power and noise, are incorrect, but
do not affect general data quality. The calibration constant used in the reflectivity
calculation is correct. If absolutely needed, the parameters can be obtained from the
auxiliary file or other parameters within the same a1 file.
The unambiguous range is incorrect, but does not affect general data quality.
The SNR is incorrect and will impact data quality masks that use SNR as a parameter. |
| Suggestions: | Users can correct the SNR by applying an offset of 1 dB.
Users can correct the unambiguous range by replacing the values with 15110 meters.
Users should not use the following parameters in calculations:
radar_measured_transmit_power_h
r_calib_xmit_power_h
r_calib_receiver_gain_hc
r_calib_receiver_gain_vx
r_calib_noise_hc
r_calib_noise_vx
r_calib_noise_source_power_h
r_calib_noise_source_power_v
If needed, the following can be used instead:
From the same a1 file:
sky_power_copol (for r_calib_noise_hc)
sky_power_xpol (for r_calib_noise_vx)
From the associated Auxiliary file:
output_power (for radar_measured_transmit_power_h and r_calib_xmit_power_h)
hot_noise_copol (for r_calib_noise_source_power_h)
hot_noise_xpol (for r_calib_noise_source_power_v)
receiver_gain_copol (for r_calib_receiver_gain_hc)
receiver_gain_xpol (for r_calib receiver_gain_vx) |
| Measurements: | asiwsacrslrM1.a1: - Noise flor for vertical cross-polar channel 2(r_calib_noise_vx)
- Unambiguous range(unambiguous_range)
- calibrated_radar_receiver_gain_v_co_polar_channel(r_calib_receiver_gain_hc)
- Receiver gain for vertical cross-polar channel 2(r_calib_receiver_gain_vx)
- Signal-to-noise-ratio(snr)
- Radar measured transmit power, h channel(radar_measured_transmit_power_h)
- Noise power in noise source region for vertical cross-polar channel(r_calib_noise_source_power_v)
- Transmit power(r_calib_xmit_power_h)
- Noise floor power for horizontal copolar channel1(r_calib_noise_hc)
- Noise power in noise source region for horizontal copolar channel 1(r_calib_noise_source_power_h)
more
asiwsacrcrcalM1.a1: - calibrated_radar_receiver_gain_v_co_polar_channel(r_calib_receiver_gain_hc)
- Unambiguous range(unambiguous_range)
- Transmit power(r_calib_xmit_power_h)
- Radar measured transmit power, h channel(radar_measured_transmit_power_h)
- Receiver gain for vertical cross-polar channel 2(r_calib_receiver_gain_vx)
- Noise floor power for horizontal copolar channel1(r_calib_noise_hc)
- Noise power in noise source region for horizontal copolar channel 1(r_calib_noise_source_power_h)
- Noise flor for vertical cross-polar channel 2(r_calib_noise_vx)
- Signal-to-noise-ratio(snr)
- Noise power in noise source region for vertical cross-polar channel(r_calib_noise_source_power_v)
more
asiwsacrawrhiM1.a1: - Radar measured transmit power, h channel(radar_measured_transmit_power_h)
- Noise flor for vertical cross-polar channel 2(r_calib_noise_vx)
- Noise power in noise source region for horizontal copolar channel 1(r_calib_noise_source_power_h)
- Noise floor power for horizontal copolar channel1(r_calib_noise_hc)
- Signal-to-noise-ratio(snr)
- calibrated_radar_receiver_gain_v_co_polar_channel(r_calib_receiver_gain_hc)
- Transmit power(r_calib_xmit_power_h)
- Unambiguous range(unambiguous_range)
- Receiver gain for vertical cross-polar channel 2(r_calib_receiver_gain_vx)
- Noise power in noise source region for vertical cross-polar channel(r_calib_noise_source_power_v)
more
asiwsacrhsrhiM1.a1: - Transmit power(r_calib_xmit_power_h)
- calibrated_radar_receiver_gain_v_co_polar_channel(r_calib_receiver_gain_hc)
- Radar measured transmit power, h channel(radar_measured_transmit_power_h)
- Noise floor power for horizontal copolar channel1(r_calib_noise_hc)
- Unambiguous range(unambiguous_range)
- Receiver gain for vertical cross-polar channel 2(r_calib_receiver_gain_vx)
- Noise flor for vertical cross-polar channel 2(r_calib_noise_vx)
- Noise power in noise source region for vertical cross-polar channel(r_calib_noise_source_power_v)
- Noise power in noise source region for horizontal copolar channel 1(r_calib_noise_source_power_h)
- Signal-to-noise-ratio(snr)
more
asiwsacrcwrhiM1.a1: - Receiver gain for vertical cross-polar channel 2(r_calib_receiver_gain_vx)
- Noise power in noise source region for horizontal copolar channel 1(r_calib_noise_source_power_h)
- Signal-to-noise-ratio(snr)
- Noise flor for vertical cross-polar channel 2(r_calib_noise_vx)
- calibrated_radar_receiver_gain_v_co_polar_channel(r_calib_receiver_gain_hc)
- Noise power in noise source region for vertical cross-polar channel(r_calib_noise_source_power_v)
- Transmit power(r_calib_xmit_power_h)
- Unambiguous range(unambiguous_range)
- Radar measured transmit power, h channel(radar_measured_transmit_power_h)
- Noise floor power for horizontal copolar channel1(r_calib_noise_hc)
more
asiwsacrcrrasterM1.a1: - Noise power in noise source region for horizontal copolar channel 1(r_calib_noise_source_power_h)
- Noise floor power for horizontal copolar channel1(r_calib_noise_hc)
- Radar measured transmit power, h channel(radar_measured_transmit_power_h)
- Transmit power(r_calib_xmit_power_h)
- Noise power in noise source region for vertical cross-polar channel(r_calib_noise_source_power_v)
- calibrated_radar_receiver_gain_v_co_polar_channel(r_calib_receiver_gain_hc)
- Unambiguous range(unambiguous_range)
- Noise flor for vertical cross-polar channel 2(r_calib_noise_vx)
- Receiver gain for vertical cross-polar channel 2(r_calib_receiver_gain_vx)
- Signal-to-noise-ratio(snr)
more
asiwsacrppiM1.a1: - calibrated_radar_receiver_gain_v_co_polar_channel(r_calib_receiver_gain_hc)
- Receiver gain for vertical cross-polar channel 2(r_calib_receiver_gain_vx)
- Unambiguous range(unambiguous_range)
- Transmit power(r_calib_xmit_power_h)
- Noise power in noise source region for vertical cross-polar channel(r_calib_noise_source_power_v)
- Noise power in noise source region for horizontal copolar channel 1(r_calib_noise_source_power_h)
- Radar measured transmit power, h channel(radar_measured_transmit_power_h)
- Noise flor for vertical cross-polar channel 2(r_calib_noise_vx)
- Signal-to-noise-ratio(snr)
- Noise floor power for horizontal copolar channel1(r_calib_noise_hc)
more
asiwsacrvptM1.a1: - Noise flor for vertical cross-polar channel 2(r_calib_noise_vx)
- calibrated_radar_receiver_gain_v_co_polar_channel(r_calib_receiver_gain_hc)
- Unambiguous range(unambiguous_range)
- Receiver gain for vertical cross-polar channel 2(r_calib_receiver_gain_vx)
- Radar measured transmit power, h channel(radar_measured_transmit_power_h)
- Noise power in noise source region for vertical cross-polar channel(r_calib_noise_source_power_v)
- Noise power in noise source region for horizontal copolar channel 1(r_calib_noise_source_power_h)
- Transmit power(r_calib_xmit_power_h)
- Noise floor power for horizontal copolar channel1(r_calib_noise_hc)
- Signal-to-noise-ratio(snr)
more
asiwsacrblrhiM1.a1: - Unambiguous range(unambiguous_range)
- Noise floor power for horizontal copolar channel1(r_calib_noise_hc)
- Noise power in noise source region for horizontal copolar channel 1(r_calib_noise_source_power_h)
- Radar measured transmit power, h channel(radar_measured_transmit_power_h)
- Noise power in noise source region for vertical cross-polar channel(r_calib_noise_source_power_v)
- Transmit power(r_calib_xmit_power_h)
- calibrated_radar_receiver_gain_v_co_polar_channel(r_calib_receiver_gain_hc)
- Receiver gain for vertical cross-polar channel 2(r_calib_receiver_gain_vx)
- Signal-to-noise-ratio(snr)
- Noise flor for vertical cross-polar channel 2(r_calib_noise_vx)
more
asiwsacrcrrhiM1.a1: - Noise floor power for horizontal copolar channel1(r_calib_noise_hc)
- Signal-to-noise-ratio(snr)
- Noise power in noise source region for horizontal copolar channel 1(r_calib_noise_source_power_h)
- Radar measured transmit power, h channel(radar_measured_transmit_power_h)
- Noise power in noise source region for vertical cross-polar channel(r_calib_noise_source_power_v)
- Noise flor for vertical cross-polar channel 2(r_calib_noise_vx)
- calibrated_radar_receiver_gain_v_co_polar_channel(r_calib_receiver_gain_hc)
- Unambiguous range(unambiguous_range)
- Transmit power(r_calib_xmit_power_h)
- Receiver gain for vertical cross-polar channel 2(r_calib_receiver_gain_vx)
more
asiwsacrrhiM1.a1: - Signal-to-noise-ratio(snr)
- calibrated_radar_receiver_gain_v_co_polar_channel(r_calib_receiver_gain_hc)
- Noise flor for vertical cross-polar channel 2(r_calib_noise_vx)
- Radar measured transmit power, h channel(radar_measured_transmit_power_h)
- Unambiguous range(unambiguous_range)
- Transmit power(r_calib_xmit_power_h)
- Noise floor power for horizontal copolar channel1(r_calib_noise_hc)
- Receiver gain for vertical cross-polar channel 2(r_calib_receiver_gain_vx)
- Noise power in noise source region for horizontal copolar channel 1(r_calib_noise_source_power_h)
- Noise power in noise source region for vertical cross-polar channel(r_calib_noise_source_power_v)
more
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