The Mission and Spacecraft Library

Applications Technology Satellite-4
Part of the ATS (Applications Technology Satellites) program

A launch vehicle failure stranded ATS-4 in a much lower than planned orbit, making the satellite nearly useless. Although the spacecraft's systems were functional, little data was obtained.

Gravity gradient stabilized, 130 W BOL

C-band communications package

Country of Origin United States
Customer/User NASA, NSF
Manufacturer(s) Hughes
Size 1.4 m dia. x 1.8 m high cylinder
Orbit Planned to go to GEO, but Agena failure left it in 217 x 772 km orbit.
Design Life 3 years

Launch Facts
 Name  Int'l Desig.  Date  Site  Vehicle  Orbit  Mass(kg)
 ATS 4  1968-068A  8/10/68  ESMC  Atlas Centaur  LEO  391
    Applications Technology Satellite; 2nd stage failure left in useless LEO orbit

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