Datastream : XSAPRPPI

X-SAPR Plan Position Indicator scan

Active Dates
2010.12.14 - 2016.07.24

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 (Intermediate)
SGPI5 Browse DataGarber, OK (Intermediate)
SGPI6 Browse DataDeer Creek, OK (Intermediate)


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

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

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

Bradley Isom
Pacific Northwest National Laboratory

Scott Collis
Argonne National Laboratory
data analysis

Alyssa Matthews
Pacific Northwest National Laboratory
data analysis

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