The Goddard DAAC provides the following tools to help users visualize
data in the Hierarchical Data Format (HDF).
TSDIS Orbit Viewer
The TSDIS Orbit Viewer is a menu-driven graphical interface for
dynamically generating images from TRMM HDF files. The viewer can
display, at the full instrument resolution, TRMM satellite, Ground
Validation, browse, and Coincidence Subsetted Intermediate (CSI)
products, as well as other derived products.
The software runs on Microsoft Windows and UNIX.
The source code and installation instructions for the Orbit Viewer are
available from the Goddard DAAC's TRMM ftp site (ftp://disc2.nascom.nasa.gov/software/trmm_software/Orbit_Viewer).
Please note: TSDIS can provide technical support for
the Orbit Viewer only to certain members of the TRMM Science Team. Other
users should contact the DAAC's Hydrology Data Support
EOSView is a standalone X-based data visualization tool that displays
HDF files. It can be used to view data ordered from the Goddard DAAC. In
addition, it provides a secondary mechanism for previewing browse files
before ordering data. (The primary mechanism is the preview feature of
the TRMM Data
Search and Order System.) EOSView serves as a file verification tool.
The contents of HDF files are displayed and individual objects can be
selected for display. Displayable objects include raster images, data
sets in tables, pseudocolor images of data sets, attributes, and
annotations. Simple animations can be performed for a file with multiple
A unique interface has been provided for handling HDF-EOS data
structures. The Swath/Point/Grid interface uses only HDF-EOS library
calls. EOSView users will not see the underlying HDF structures but will
be prompted for what parts of the HDF-EOS object they wish to view. The
EOSView requires at least 4 megabytes of memory and a larger than 24-bit
Download Instructions for the
These tools can be downloaded via anonymous ftp using a command
line ftp client, available on all Unix machines.
The source code, installation instructions, and documentation for
EOSView and Orbit Viewer are available from the Goddard DAAC's
TRMM ftp site
The following files should be downloaded for EOSView:
- EOSView (executable)
- eosview.csc (help)
- eosview.uid (user interface description file)
- eosview.dat (IDL commands file)
- How to start EOSView:
Start EOSView by typing 'EOSView' at the command prompt. The
current working directory must contain the four EOSView files.