Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer

These are miscellaneous optics and film canisters from the laser-ranging satellite tracking system that the Smithsonian Astrophysical Observatory (SAO) used at Mt. Hopkins near Tucson, Arizona. The satellite laser tracking systems were designed as a refinement on the Baker-Nunn cameras developed by SAO in connection with the International Geophysical Year. They comprised a laser transmitter mounted side-by-side with a telescope receiver, which were used to obtain highly accurate measurements of orbital altitudes and tracks of artificial satellites. They provided ranging data at accuracy levels of one meter or better.

SAO operated four laser-tracking systems around the world—in Brazil, Peru, Australia, and Mt. Hopkins. The program was used to track a large number of satellites from its inception in 1968 until it was shut down in 1982. They transferred these items to the Museum in 1980.

Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Object Details
Country of Origin United States of America Type EQUIPMENT-Photographic Manufacturer Spacerays Inc; Boller & Chivens
Dimensions Storage (Rehoused on aluminum pallet with one additional object): 121.9 × 121.9cm, 102.5kg, 63.5cm (48 × 48 in., 226lb., 25 in.)
Materials Steel, Plastic, Glass, Adhesive, Paper
Inventory Number A19840406001 Credit Line Transfered from Smithsonian Astrophysical Observatory Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.