GPM Ground Validation Advanced Microwave Precipitation Radiometer (AMPR) OLYMPEX V1

The GPM Ground Validation Advanced Microwave Precipitation Radiometer (AMPR) OLYMPEX dataset was collected by the AMPR instrument flown on the high altitude ER-2 research aircraft from November 9 - December 15, 2015, during the Olympic Mountains Experiment (OLYMPEX) field campaign conducted at Washington State’s Olympic Peninsula. AMPR is an airborne passive microwave radiometer from which cloud, precipitation, water vapor, wind speed and wind direction can be obtained using advanced algorithms with the 10.7, 19.35, 37.1, and 85.5 GHz microwave frequency brightness temperatures measured by AMPR. The primary goal of OLYMPEX was to validate rain and snow measurements in midlatitude frontal systems moving from ocean to coast to mountains. AMPR data at the Global Hydrology Resource Center (GHRC) DAAC include netCDF format data files of brightness temperature and PNG browse files of Quality Control Flags and Brightness Temperatures.

Data and Resources

Additional Info

Field	Value
Maintainer	Earthdata Forum
Last Updated	September 15, 2026, 05:26 (UTC)
Created	April 1, 2025, 16:13 (UTC)
accessLevel	public
bureauCode	{026:00}
catalog_conformsTo	https://project-open-data.cio.gov/v1.1/schema
harvest_object_id	4091b134-c777-4923-9255-d36af218a0f0
harvest_source_id	b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title	Science Discovery Engine
identifier	10.5067/GPMGV/OLYMPEX/AMPR/DATA101
license	https://www.usa.gov/government-works
modified	2026-09-07T22:16:04Z
programCode	{026:000}
publisher	NASA/MSFC/GHRC
resource-type	Dataset
source_datajson_identifier	true
source_hash	6ef674ce5a9fe8f4a5789943fa653b8b1fb5a47618aa92423adf9ddd8686e7be
source_schema_version	1.1
spatial	["CARTESIAN", [{"WestBoundingCoordinate": -130.947, "NorthBoundingCoordinate": 50.0166, "EastBoundingCoordinate": -117.287, "SouthBoundingCoordinate": 33.7591}]]
temporal	2015-11-09/2015-12-15
theme	{"Earth Science"}