netcdf marmwacrshipcorM1.c1.20180324.000000 { dimensions: time = UNLIMITED ; // (26836 currently) height = 602 ; gps_string_len = 8 ; variables: int base_time ; base_time:string = "2018-03-24 00:00:00 0:00" ; base_time:long_name = "Base time in Epoch" ; base_time:units = "seconds since 1970-1-1 0:00:00 0:00" ; base_time:ancillary_variables = "time_offset" ; double time_offset(time) ; time_offset:long_name = "Time offset from base_time" ; time_offset:units = "seconds since 2018-03-24 00:00:00 0:00" ; time_offset:ancillary_variables = "base_time" ; double time(time) ; time:long_name = "Time offset from midnight" ; time:units = "seconds since 2018-03-24 00:00:00 0:00" ; time:ancillary_variables = "base_time" ; time:standard_name = "time" ; float height(height) ; height:long_name = "Range to center of measurement volume" ; height:units = "meter" ; int polarization(time) ; polarization:long_name = "Polarization mode, 0=copol, 1=xpol" ; polarization:units = "none" ; polarization:missing_value = -9999 ; float reflectivity(time, height) ; reflectivity:long_name = "Equivalent reflectivity factor" ; reflectivity:units = "dBZ" ; reflectivity:valid_min = -90.f ; reflectivity:valid_max = 50.f ; reflectivity:missing_value = -9999.f ; reflectivity:comment = "When operating in dual-polarization mode, polarization alternates with time. See \'polarization\' field to determine polarization state of each time profile." ; float mean_doppler_velocity(time, height) ; mean_doppler_velocity:long_name = "Mean Doppler velocity, corrected for ship motion" ; mean_doppler_velocity:units = "m/s" ; mean_doppler_velocity:ancillary_variables = "qc_mean_doppler_velocity source_heave_velocity_correction" ; mean_doppler_velocity:valid_min = -25.f ; mean_doppler_velocity:valid_max = 25.f ; mean_doppler_velocity:missing_value = -9999.f ; mean_doppler_velocity:comment = "When operating in dual-polarization mode, polarization alternates with time. See \'polarization\' field to determine polarization state of each time profile." ; int qc_mean_doppler_velocity(time, height) ; qc_mean_doppler_velocity:long_name = "Quality check results on field: Mean Doppler velocity, corrected for ship motion" ; qc_mean_doppler_velocity:units = "unitless" ; qc_mean_doppler_velocity:description = "This field contains bit packed integer values, where each bit represents a QC test on the data. Non-zero bits indicate the QC condition given in the description for those bits; a value of 0 (no bits set) indicates the data has not failed any QC tests." ; qc_mean_doppler_velocity:flag_method = "bit" ; qc_mean_doppler_velocity:bit_1_description = "Value is set to missing_value" ; qc_mean_doppler_velocity:bit_1_assessment = "Bad" ; qc_mean_doppler_velocity:bit_2_description = "Value is less than the valid_min" ; qc_mean_doppler_velocity:bit_2_assessment = "Bad" ; qc_mean_doppler_velocity:bit_3_description = "Value is greater than the valid_max" ; qc_mean_doppler_velocity:bit_3_assessment = "Bad" ; int source_heave_velocity_correction(time, height) ; source_heave_velocity_correction:long_name = "Source of the heave_velocity data used to correct: mean_doppler_velocity" ; source_heave_velocity_correction:units = "unitless" ; source_heave_velocity_correction:description = "This field contains integer values which should be interpreted as listed." ; source_heave_velocity_correction:flag_method = "integer" ; source_heave_velocity_correction:flag_0_description = "navbe.c1: heave_velocity" ; source_heave_velocity_correction:flag_1_description = "mwacr.a1: heave_velocity" ; source_heave_velocity_correction:flag_2_description = "No heave_velocity data; no correction made" ; float spectral_width(time, height) ; spectral_width:long_name = "Spectral width" ; spectral_width:units = "m/s" ; spectral_width:valid_min = 0.f ; spectral_width:valid_max = 10.f ; spectral_width:missing_value = -9999.f ; spectral_width:comment = "When operating in dual-polarization mode, polarization alternates with time. See \'polarization\' field to determine polarization state of each time profile." ; float signal_to_noise_ratio(time, height) ; signal_to_noise_ratio:long_name = "Signal to noise ratio" ; signal_to_noise_ratio:units = "dB" ; signal_to_noise_ratio:resolution = 0.001f ; signal_to_noise_ratio:missing_value = -9999.f ; float noise_power_sky(time) ; noise_power_sky:long_name = "Total sky noise power prior to spectrum computation" ; noise_power_sky:units = "mW" ; noise_power_sky:missing_value = -9999.f ; float noise_figure(time) ; noise_figure:long_name = "Receiver noise figure estimated from noise source measurements using Y-factor method." ; noise_figure:units = "dB" ; noise_figure:missing_value = -9999.f ; float gain(time) ; gain:long_name = "Receiver gain estimated from noise source measurements using Y-factor method" ; gain:units = "dB" ; gain:missing_value = -9999.f ; float roll(time) ; roll:long_name = "Ship roll, axis along ship length, positive is port up" ; roll:units = "deg" ; roll:missing_value = -9999.f ; float pitch(time) ; pitch:long_name = "Ship pitch, axis starboard-to-port, positive is bow up" ; pitch:units = "deg" ; pitch:missing_value = -9999.f ; float surge(time) ; surge:long_name = "Ship surge displacement along ship length, positive forward." ; surge:units = "m" ; surge:missing_value = -9999.f ; float sway(time) ; sway:long_name = "Ship sway, starboard-to-port displacement, positive to port" ; sway:units = "m" ; sway:missing_value = -9999.f ; float heave(time) ; heave:long_name = "Ship heave displacement along vertical axis, positive upward" ; heave:units = "m" ; heave:missing_value = -9999.f ; float surge_velocity(time) ; surge_velocity:long_name = "Ship surge velocity along ship length, positive forward." ; surge_velocity:units = "m/s" ; surge_velocity:missing_value = -9999.f ; float sway_velocity(time) ; sway_velocity:long_name = "Ship sway velocity, starboard-to-port displacement, positive to port" ; sway_velocity:units = "m/s" ; sway_velocity:missing_value = -9999.f ; float heave_velocity(time) ; heave_velocity:long_name = "Ship heave velocity along vertical axis, positive upward" ; heave_velocity:units = "m/s" ; heave_velocity:missing_value = -9999.f ; float surge_acceleration(time) ; surge_acceleration:long_name = "Ship surge acceleration along ship length, positive forward" ; surge_acceleration:units = "m/s^2" ; surge_acceleration:missing_value = -9999.f ; float sway_acceleration(time) ; sway_acceleration:long_name = "Ship sway acceleration starboard-to-port, positive to port" ; sway_acceleration:units = "m/s^2" ; sway_acceleration:missing_value = -9999.f ; float heave_acceleration(time) ; heave_acceleration:long_name = "Ship heave acceleration along vertical axis, positive upward" ; heave_acceleration:units = "m/s^2" ; heave_acceleration:missing_value = -9999.f ; char gps_timestamp(time, gps_string_len) ; gps_timestamp:long_name = "GPS timestamp" ; gps_timestamp:units = "time" ; gps_timestamp:missing_value = "-9999" ; float gps_heading(time) ; gps_heading:long_name = "GPS-determined velocity vector heading angle" ; gps_heading:units = "deg" ; gps_heading:missing_value = -9999.f ; float gps_velocity(time) ; gps_velocity:long_name = "GPS-determined velocity" ; gps_velocity:units = "km/hour" ; gps_velocity:missing_value = -9999.f ; float lat(time) ; lat:long_name = "North latitude" ; lat:units = "degree_N" ; lat:valid_min = -90.f ; lat:valid_max = 90.f ; float lon(time) ; lon:long_name = "East longitude" ; lon:units = "degree_E" ; lon:valid_min = -180.f ; lon:valid_max = 180.f ; float alt(time) ; alt:long_name = "Altitude above mean sea level" ; alt:units = "m" ; // global attributes: :command_line = "idl -R -n mwacrshipcor -s mar -f M1 -b 20180313 -e 20180325 -R" ; :process_version = "vap-mwacrshipcor-0.1-0.el6" ; :dod_version = "mwacrshipcor-c1-2.0" ; :input_datastreams = "marmwacrM1.a1 : 4.5 : 20180324.000000\n", "marnavbeM1.c1 : 0.1 : 20180324.000000" ; :site_id = "mar" ; :facility_id = "M1: Resupply Vessel Aurora Australis" ; :data_level = "c1" ; :sampling_interval = "variable" ; :averaging_interval = "None" ; :serial_number = "Not specified" ; :antenna_altitude = "17.0 m" ; :antenna_diameter = "0.6096 m" ; :antenna_gain = "51.480000 (dB)" ; :beamwidth_theta = "0.370000 (deg)" ; :beamwidth_phi = "0.390000 (deg)" ; :cal_constant = "-24.308829 (dB)" ; :clutter_avg_len = "6" ; :clutter_filter_enabled = "1" ; :fftlen = "512" ; :gate_spacing = "29.979246 m" ; :nearfield_correction_description = "\"The nearfield correction should be applied to Reflectivity at ranges less than the farfield range of (2. * antenna_diameter * antenna_diameter / radar_wavelength) The suggested correction can be found in Sekelsky, S. (2002), JAOT, v19, no.4\" ;" ; :nyquist_velocity = "6.019813 (m/s)" ; :num_spectral_averages = "5" ; :prf = "7.63e+03 (Hz)" ; :pulse_length = "400 (ns)" ; :range_offset = "-12.750000 (m)" ; :radar_operating_frequency = "95.040000 (GHz)" ; :radar_wavelength = "0.003154 (m)" ; :zero_gate_range = "59.949671 (m)" ; :datastream = "marmwacrshipcorM1.c1" ; :doi = "10.5439/1350621" ; :history = "created by user ttoto on machine lead at 2019-05-06 23:21:12, using vap-mwacrshipcor-0.1-0.el6" ; }