Tools

The following table lists the tools that work with SMAP HDF5-formatted data.

Tool Description
HDFView Visual tool for browsing and editing HDF4 and HDF5 files.
HDF-EOS Tools and Information Center Provides example code for accessing and visualizing SMAP data in MATLAB, Python, IDL, and NCL.
Worldview NASA visualization tool for browsing full-resolution imagery and downloading the underlying data.
Earthdata Search NASA's newest search and order tool for subsetting, reprojecting, and reformatting data.
Reverb | ECHO NASA search and order tool for subsetting, reprojecting, and reformatting data. Note that Reverb has been replaced by a newer tool—Earthdata Search—and will soon be decommissioned.
EASE-Grid Data Web Site Provides tools and documentation for working with EASE-Grid data.
Panoply netCDF, HDF, and GRIB Data Viewer Cross-platform application that plots geo-gridded arrays from netCDF, HDF, and GRIB data sets.
NASA LaRC Satellite Overpass Predictor An interactive tool that allows users to estimate when the SMAP satellite has passed, or will pass, over an area of the Earth. Users specify latitude and longitude or select a location on the map for which to calculate a 5-day sequence of satellite overpasses. All overpasses are returned for which the specified location falls within the 1000 km SMAP swath centered on the nadir track.  Note: Predictions beyond 15 days should not be used as they become increasingly less accurate as a function of time. In general, predictions of up to five days provide a safe margin.
About the Orbit Overpass Predictor Algorithm
The prediction algorithm models the orbit based on the known position information from the latest two-line orbital elements (TLE) records obtained from the North American Aerospace Defense Command (NORAD). The TLE records contain the position sensed during the radar scan. Normally two records are created per day, but sometimes up to three are created. The model is factoring the earth's bulge and also the weight of the continents as there are more above the equator than below. The model does not factor for the positions of continents relative to the satellite nor air resistance due to the rotational motion of the satellite in the atmosphere.
SMAP Overflights Tool Tool that allows users to compute a simulated 8-day sequence of satellite overpasses at a user’s point location (latitude and longitude). All overpasses are listed for which the point location falls within the 1000 km SMAP swath centered on the nadir track. For orbit characteristics, visit the JPL SMAP Specifications Web page.