I went out to the Smithsonian’s Udvar-Hazy Air and Space museum annex at Dulles International Airport in Chantilly, Virginia last weekend and was pleasantly surprised to see one of the SRTM payloads hanging off the ceiling. The Shuttle Radar Telemetry Mapping program helped produce a significantly more accurate and detailed world-wide digital elevation model (DEM, DTM) in the early part of this decade and was a great leap forward for shaded relief generation. If you make the trip, you’ll find the SRTM between 22 and 23 on the map below in the “space shuttle” hanger. The map does a good job of indicating what altitude different aircraft can be found in the hanger.
Here’s a photo:
|Cannister/Mast, Shuttle Radar Topography Mission Payload
(republished from the Smithsonian)
|In 2000, the Shuttle Endeavor carried the Shuttle Radar Topography Mission (SRTM) payload into orbit. Shuttle astronauts used the payload, manufactured by the AEC-Able Engineering Co., to map in high detail and three dimensions more than 70 percent of the Earth’s surface–the most complete and accurate rendering of the planet’s land masses ever attempted. The Museum possesses two components–the mast canister (this artifact) and the outboard support structure with its antennas–crucial to that mission.
To acquire this data, the SRTM used a novel hardware system that featured a main antenna located in the Shuttle payload bay, a folding mast (in the mast canister) that extended 60 meters from the Shuttle, and then another antenna system that was positioned at the end of the mast (the outboard structure). It was this dual antenna system–the largest rigid structure then flown in space–that produced, through interferometry (a technique for combining the information obtained from the two, separate antennas), a three-dimensional mapping of the Earth.
The mission was a joint undertaking of NASA’s Jet Propulsion Laboratory and the Department of Defense’s National Imagery and Mapping Agency. The military will use the highest resolution data from SRTM for terrain navigation for planes and cruise missiles. A lower resolution data set will be made available to civilian scientists and other users.
NASA transferred these artifacts to the Museum in 2003.
|Transferred from NASA|
|Manufacturer: AEC-Able Engineering Co.|
|Country of Origin: United States of America|
Overall: 292.1 length x 136cm diameter, 984.3kg weight (9ft 7in. x 4ft 5 9/16in., 2170lb.)
Aluminum, steel, titanium, plastic, copper
|Inventory Number: A20040261000|
General layout of the museum: