Ground Validation

Content related to ground validation activities and field campaigns.

OLYMPEX Successfully Grabs the Rains
Video Embed
JacobAdmin Fri, 01/29/2016

NASA is finishing its campaign to study extreme rain, snow and winds of the Olympic National Forest. Scientists Walt Petersen of NASA Marshall and Robert Houze of the University of Washington narrate this inside look at the Olympic Mountain Experiment (OLYMPEX) field campaign. During the campaign, NASA and its partners gathered precipitation data through both ground and airborne instruments around the Olympic Peninsula in Washington State. They measured the abundance and variety of precipitation including light rain, heavy thunderstorms, and snowfall in the coastal forest.

OLYMPEX Scientists in the Field
From November 10 through December 21, NASA and university scientists are taking to the field to study wet winter weather near Seattle, Washington. With weather radars, weather balloons, specialized ground instruments, and NASA's DC-8 flying laboratory, the science team will be verifying rain and snowfall observations made by the Global Precipitation Measurement (GPM) satellite mission on a NASA-led field campaign, The Olympic Mountain Experiment, or OLYMPEX. Rachael Kroodsma is the instrument scientist for the CoSMIR on board NASA's DC-8 airborne laboratory as part of the OLYMPEX field...
OLYMPEX Scientists in the Field: Joe Zagrodnik
Video Embed
JacobAdmin Fri, 12/11/2015

Joe Zagrodnik is a student at the University of Washington who is working with NASA scientists to measure the properties of rain and snow in the Olympic National Park.

OLYMPEX Scientists in the Field: Rachael Kroodsma
Video Embed

JacobAdmin Wed, 12/09/2015

Rachael Kroodsma is the instrument scientist for the CoSMIR on board NASA's DC-8 airborne laboratory as part of the OLYMPEX field campaign. 

Researchers Gear Up for OLYMPEX
Video Embed
JacobAdmin Thu, 11/12/2015

The Olympic Mountain Experiment, or OLYMPEX, is a NASA-led field campaign, which will take place on the Olympic Peninsula of Washington State from November 2015 through February 2016. The goal of the campaign is to collect detailed atmospheric measurements that will be used to evaluate how well rain-observing satellites measure rainfall and snowfall from space.

Pacific NW Campaign to Measure Rain & Snow
From Nov. 10 through Dec. 21, NASA and university scientists are taking to the field to study wet winter weather near Seattle, Washington. With weather radars, weather balloons, specialized ground instruments, and NASA's DC-8 flying laboratory, the science team will be verifying rain and snowfall observations made by the Global Precipitation Measurement (GPM) satellite mission. Credits: NASA's Goddard Space Flight Center The Pacific Northwest was chosen because of its frequent and persistent winter rain and snowfall. On average 100 to 180 inches of precipitation fall a year, making it one of...
Media are invited to go behind the scenes of a comprehensive field campaign focused on yielding new insights into global precipitation at a special event on Nov. 11, 2015.  NASA's DC-8 deploys to Iceland on a mission to study Arctic polar winds. NASA's DC-8 flying laboratory will be featured as part of a special media event on Nov. 11, 2015 focused on the Olympic Mountain Experiment (OLYMPEX), an Earth science campaign aimed at validating Global Precipitation Measurement. Credits: NASA Photo / Carla Thomas
Media are invited to go behind the scenes of a comprehensive field campaign focused on yielding new insights into global precipitation at a special event on Nov. 11, 2015. NASA's DC-8 flying laboratory will be featured as part of a special media event on Nov. 11, 2015 focused on the Olympic Mountain Experiment (OLYMPEX), an Earth science campaign aimed at validating Global Precipitation Measurement. Credits: NASA Photo / Carla Thomas Held in collaboration with the University of Washington, NASA's Olympic Mountain Experiment (OLYMPEX) is an Earth science campaign aimed at validating Global...
OLYMPEX Field Campaign map
The Olympic Mountain Experiment (OLYMPEX) The Olympic Mountain Experiment, or OLYMPEX, was a NASA-led field campaign, which took place on the Olympic Peninsula of Washington State from November 2015 through February 2016. The goal of the campaign was to collect detailed atmospheric measurements that will be used to evaluate how well rain-observing satellites measure rainfall and snowfall from space. In particular, OLYMPEX assessed satellite measurements made by the Global Precipitation Measurement (GPM) mission Core Observatory, a joint mission by NASA and the Japan Aerospace Exploration...
Document Description

This document provides a basic set of documentation for the data products available from the GPM Ground Validation System (GVS) Validation Network (VN). In the GPM era the VN performs a direct match-up of GPM’s space-based Dual-frequency Precipitation Radar (DPR) data with ground radar data from the U.S. network of NOAA Weather Surveillance Radar-1988 Doppler (WSR-88D, or “NEXRAD”). Ground radar networks from international partners are also part of the VN.

IPHEx Campaign Demonstrates Two New Instruments
Three Radars are Better than One Putting three radars on a plane to measure rainfall may seem like overkill. But for the Integrated Precipitation and Hydrology Experiment field campaign in North Carolina recently, more definitely was better. During the field campaign, NASA's ER-2 research aircraft flew out of Robins Air Force Base in Georgia. HIWRAP is under the wing in the black compartment; the Cloud Radar System is under the other wing and is not visible; and the EXRAD radar is in the extended nose cone. Image Credit: NASA / Gerry Heymsfield The three instruments, developed by the High...