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Description

The GPM Ground Validation Airborne Precipitation Radar 3rd Generation (APR-3) OLYMPEX V2 dataset was collected from November 12, 2015 to December 19, 2015 during the GPM Ground Validation Olympic Mountains Experiment (OLYMPEX) field campaign held in the Pacific Northwest. This dataset is version -2 (V2) of the APR-3, an enhanced and upgraded instrument derived from the APR-2 used in previous field campaigns. APR-3 has the addition of W-band measurement capability, and scans cross-track from +/- 25° to the right and left of nadir. Ku-band, Ka-band, and W-band frequency Doppler measurements are made by APR-3 from the DC-8 aircraft at 10 km altitude during OLYMPEX. The APR-3 dataset files are in HDF-5 format with JPG format browse images. This dataset contains radar reflectivity, Doppler velocity for all bands, linear depolarization ratio at Ku-band, and normalized radar cross section measurements at Ka and Ku-bands.

Product Summary

Platforms
NASA DC-8
Instruments
APR-3
Spatial Extent

N: 49.4321 S: 46.1711 E: -122.026 W: -129.14

Location
WASHINGTON
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2015-11-12 to 2015-12-19
Data Partner
Global Hydrometeorology Resource Center, Marshall Space Flight Center, NASA (NASA/MSFC/GHRC)
Concept ID
C1979127310-GHRC_DAAC
Data State
COMPLETE
Number of Files/Granules
314
Processing Level
2
Published
Updated
Science Keywords
Doppler Velocity ,
Radar Reflectivity

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Stephen Durden, S. T. (2025). GPM Ground Validation Airborne Precipitation Radar 3rd Generation (APR-3) OLYMPEX V2 [Data set]. NASA Global Hydrometeorology Resource Center Distributed Active Archive Center. https://doi.org/10.5067/GPMGV/OLYMPEX/APR3/DATA201 Date Accessed: 2026-05-13

Documents

Publications Citing This Dataset

Filters
Title Year Author Topic
Microphysical enhancement processes within stratiform precipitation on the barrier and sub-barrier scale of the Olympic mountains Zagrodnik, Joseph P., McMurdie, Lynn, Conrick, Robert Precipitation Amount, Precipitation Rate, Droplet Size, Hydrometeors, Liquid Precipitation, Drizzle, Rain, Liquid Water Equivalent, Snow Water Equivalent, Solid Precipitation, Total Surface Precipitation Rate, Doppler Velocity, Radar Reflectivity
Vertical structure and microphysical characteristics of frontal systems passing over a three-dimensional coastal mountain range Zagrodnik, Joseph P., McMurdie, Lynn A., Houze, Robert A., Tanelli, Simone Precipitation Amount, Precipitation Rate, Droplet Size, Hydrometeors, Liquid Precipitation, Drizzle, Rain, Liquid Water Equivalent, Precipitation Anomalies, Snow Water Equivalent, Solid Precipitation, Total Surface Precipitation Rate, Doppler Velocity, Radar Reflectivity
Retrieval of snowflake microphysical properties from multifrequency radar observations Leinonen, Jussi, Lebsock, Matthew D., Tanelli, Simone, Sy, Ousmane O., Dolan, Brenda, Chase, Randy J., Finlon, Joseph A., von Lerber, Annakaisa, Moisseev, Dmitri SPECTRUM WIDTH, Total Precipitable Water, Radar Reflectivity, Doppler Velocity, Precipitation Rate
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