Datastream : XSAPRPPI

X-SAPR Plan Position Indicator scan

Active Dates
2010.12.14 - 2015.07.02

Measurement Categories
Cloud Properties

Originating Instrument
X-Band Scanning ARM Precipitation Radar (XSAPR)


Only measurements considered scientifically relevant are shown below by default.

Show all measurements

Measurement Units Variable
Altitude above mean sea level m alt
Altitude m altitude
azimuth_angle_from_true_north degrees azimuth ( time )
Base time in Epoch seconds since 1970-1-1 0:00:00 0:00 base_time
Cross correlation ratio (RhoHV) unitless cross_correlation_ratio ( time, range )
Differential phase (PhiDP) degrees differential_phase ( time, range )
Differential reflectivity (ZDR) dB differential_reflectivity ( time, range )
Doppler spectrum width meters_per_second doppler_spectrum_width ( time, range )
Elevation angle from horizontal plane degree elevation ( time )
File status unitless file_status
Target angle for sweep degree fixed_angle ( sweep )
North latitude degree_N lat
Latitude degree_N latitude
East longitude degree_E lon
Longitude degrees_east longitude
Mean Doppler velocity meters_per_second mean_doppler_velocity ( time, range )
Normalized coherent power unitless normalized_coherent_power ( time, range )
Unambiguous Doppler velocity m/s nyquist_velocity ( time )
Pulse repetition time seconds prt ( time )
Pulsing mode unitless prt_mode ( sweep, string_length )
range_to_measurement_volume meters range ( range )
Equivalent reflectivity factor dBZ reflectivity ( time, range )
Reflectivity horizontal dBZ reflectivity_horizontal ( time, range )
Specific differential phase (KDP) degrees_per_km specific_differential_phase ( time, range )
Spectrum width m/s spectral_width ( time, range )
Index of last ray in sweep, 0-based count sweep_end_ray_index ( sweep )
Sweep mode unitless sweep_mode ( sweep, string_length )
Sweep number count sweep_number ( sweep )
Index of first ray in sweep, 0-based count sweep_start_ray_index ( sweep )
time_in_seconds_since_volume_start time ( time )
UTC time of last ray in the file unitless time_coverage_end ( string_length )
UTC time of first ray in the file unitless time_coverage_start ( string_length )
Time offset from base_time time_offset ( time )
Total power dBZ total_power ( time, range )
Unambiguous range m unambiguous_range ( time )
Volume number unitless volume_number


North Slope Alaska
NSAC1 Browse DataCentral Facility, Barrow AK
Southern Great Plains
SGPI4 Browse Data Browse PlotsBillings, OK
SGPI5 Browse DataGarber, OK retired
SGPI6 Browse DataDeer Creek, OK
 retired = Originating instrument has been retired at this location


Nitin Bharadwaj
Pacific Northwest National Laboratory
(509) 372-4267

Dan Nelson
Pacific Northwest National Laboratory
(509) 375-6895

Joseph Hardin
Pacific Northwest National Laboratory
(509) 375-2664

Iosif (Andrei) Lindenmaier
Pacific Northwest National Laboratory
(509) 375--6802

Bradley Isom
Pacific Northwest National Laboratory

Scott Collis
Argonne National Laboratory
data analysis