NASA GHRC Home page

GHRC News

GHRC looks into support of ESDIS Cloud activities

Earthdata logo

GHRC DAAC managers and engineers are participating in information gathering and analysis in support of ESDIS Cloud activities. On May 25th they attended a telecon with ESDIS and Forrester Research. Forrester will provide recommendations on ESDIS’ approach to adopt the use of public cloud by evaluating the overarching strategy and helping to validate the expected costs and benefits for moving a DAAC to the public cloud. GHRC provided information on our data archive, processes and infrastructure, and continues to answer follow-up questions. GHRC is also participating in Phase 3 of the Cumulus project, providing a comprehensive list of data products with details on ingest, archive and distribution processes for the “Cumulus Transition Decision-Making Framework” document.

GHRC DAAC publishes IPHEx TMPA dataset

GHRC DAAC published the TRMM Multi-satellite Precipitation Analysis (TMPA) IPHEx (http://dx.doi.org/10.5067/GPMGV/IPHEX/MULTIPLE/DATA301) dataset. The IPHEx TMPA is a subset of the TMPA 3B42RT gridded precipitation product selected for the time period of the GPM Ground Validation Integrated Precipitation and Hydrology Experiment (IPHEx) held in North Carolina during May 1, 2014 to June 15, 2014. The goal of IPHEx was to characterize warm season orographic precipitation regimes and the relationship between precipitation regimes and hydrologic processes in regions of complex terrain. This dataset contains 3-hourly, 0.25 degree maps of precipitation derived using microwave (MW), infra-red (IR), surface precipitation gauge measurements, and other rain products that include the TRMM Precipitation Radar (PR) data. The IPHEx TMPA product is available in netCDF-4 and binary formats.

GHRC DAAC publishes OLYMPEX HIWRAP dataset

The GHRC DAAC has published the GPM Ground Validation High Altitude Imaging Wind and Rain Airborne Profiler (HIWRAP) OLYMPEX dataset (http://dx.doi.org/10.5067/GPMGV/OLYMPEX/HIWRAP/DATA101). The Olympic Mountain Experiment (OLYMPEX) was the final Global Precipitation Measurement (GPM) mission Ground Validation field campaign. HIWRAP is a Doppler radar designed to measure tropospheric winds through deriving Doppler profiles from cloud and precipitation volume backscatter. (Li et al. 2016). The winds are generated by combining conical scan mode measurements at two different frequency bands (Ka- and Ku-band) and two different incidence angles (30 and 40 degrees). HIWRAP utilizes solid state transmitters along with a novel pulse compression scheme resulting in a system that is considerably more compact and requires less power than typical radars used for precipitation and wind measurements. A more detailed description of the HIWRAP system and system parameters can be found in Li et al., 2016. More information about the HIWRAP instrument can be found at the Goddard Space Flight Center High Altitude Radar Group: https://har.gsfc.nasa.gov/index.php?section=13.

GHRC DAAC attends Cumulus Phase 3 Meetings at GSFC

Global Hydrology Resource Center Distributed Active Archive Center (GHRC DAAC) staff attended Cumulus Phase 3 Planning Meetings at NASA Goddard Space Flight Center (GSFC) on May 16-17, 2017, to help ESDIS and the Cumulus development team set priorities and develop a project plan for the remainder of the fiscal year. LP.DAAC, PO.DAAC and ASF were also represented.

GHRC DAAC publishes OLYMPEX D3R dataset

OLYMPEX logoGHRC DAAC has published the Dual-frequency Dual-polarized Doppler Radar (D3R) OLYMPEX (http://dx.doi.org/10.5067/GPMGV/OLYMPEX/D3R/DATA101) dataset. 
The OLYMPEX D3R dataset contains radar reflectivity and doppler velocity measurements. The D3R was developed by a government-industry-academic consortium with funding from NASA’s Global Precipitation Measurement (GPM) Project and was used in several ground validation projects. D3R is a ground-based radar that operates at the Ku band (13.91 GHz ± 25 MHz) and Ka band (35.56 GHz ± 25 MHz) frequencies. For OLYMPEX, the D3R was collocated with the NPOL radar at a coastal Washington state location on the Olympic Peninsula. Due to blockage caused by NPOL, the measurement sector is limited to a 220 deg to 120 deg sector. The data is available in netCDF format.

Sample browse image

Have you used our data? Register for updates