PVC/WSACR/M1 - Improperly collected PPI data removed from archive

During this time period some PPI scanning occurred while the antenna was at vertical 
incidence.  The antenna elevation was seemingly 'stuck' at 90 degress while the antenna spun 
in azimuth.  The resulting data were of no value and have been removed from the archive.

• Sky noise, cross-polarization(sky_noise_xpol)
• type_of_instrument(instrument_type)
• calibrated_radar_receiver_gain_v_co_polar_channel(r_calib_receiver_gain_hc)
• reflectivity(reflectivity)
• Nominal radar antenna gain, h channel(radar_antenna_gain_h)
• radiation_frequency(frequency)
• antenna_is_in_transition_between_sweeps(antenna_transition)
• Index for the calibration that applies to each ray(r_calib_index)
• Nominal radar antenna gain, v channel(radar_antenna_gain_v)
• Sky power, cross-polar(sky_power_xpol)
• Noise floor power for horizontal copolar channel1(r_calib_noise_hc)
• time_in_seconds_since_volume_start(time)
• North latitude(latitude)
• Pulse width(pulse_width)
• Cross-polar propagation phase shift(cross_polar_differential_phase)
• Time index of last ray in sweep, 0-based(sweep_end_ray_index)
• Polarization mode(polarization_mode)
• Time offset from base_time(time_offset)
• Scan rate, positive for clockwise or increasing elevation(scan_rate)
• Azimuth of Radar Ray(azimuth)
• Radar beam width, vertical channel(radar_beam_width_v)
• Sweep number, zero-based count(sweep_number)
• Transmit power(r_calib_xmit_power_h)
• Mean doppler velocity(mean_doppler_velocity)
• Sky power, copolar(sky_power_copol)
• Pulse width for this calibration(r_calib_pulse_width)
• Beam Elevation Angle(elevation)
• Primary axis of rotation(primary_axis)
• lon(lon)
• half_power_radar_beam_width_h_channel(radar_beam_width_h)
• Doppler spectrum width (second moment of the doppler spectrum)(spectral_width)
• Noise flor for vertical cross-polar channel 2(r_calib_noise_vx)
• transmit_pulse_mode(prt_mode)
• data_volume_start_time_utc(time_coverage_start)
• Copol to cross-polar correlation coefficient (also known as rhocx)(co_to_crosspol_correlation_coeff)
• Sky noise, copolar(sky_noise_copol)
• altitude(altitude)
• Time corresponding to last radial in file(time_coverage_end)
• Index of first ray in sweep, 0-based(sweep_start_ray_index)
• Noise power in noise source region for vertical cross-polar channel(r_calib_noise_source_power_v)
• Linear depolarization ratio(linear_depolarization_ratio)
• Radar constant, horizontal copolar channel 1(r_calib_radar_constant_h)
• Receiver gain for vertical cross-polar channel 2(r_calib_receiver_gain_vx)
• North Latitude(lat)
• -180.0 - +180.0(alt)
• base time in epoch(base_time)
• Unambiguous Doppler velocity(nyquist_velocity)
• Distance to the center of the corresponding range bin(range)
• platform_type(platform_type)
• Noise power in noise source region for horizontal copolar channel 1(r_calib_noise_source_power_h)
• Time of the calibration that applies to each ray(r_calib_time)
• pulse_repetition_frequency(prt)
• Scan mode for sweep(sweep_mode)
• Signal-to-noise-ratio(snr)
• altitude_above_ground_level(altitude_agl)
• Unambiguous range(unambiguous_range)
• Radar measured transmit power, h channel(radar_measured_transmit_power_h)
• Follow mode(follow_mode)
• radar_calibration_two_way_radome_loss_h_channel(r_calib_two_way_radome_loss_h)
• data_volume_index_number(volume_number)
• East longitude(longitude)
• Radar constant, vertical cross-polar channel 2(r_calib_radar_constant_v)
• Number of samples used to compute moments(n_samples)
• ray_target_fixed_angle(fixed_angle)