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Civil Engineering - Elements of Remote Sensing - Discussion

Discussion Forum : Elements of Remote Sensing - Section 2 (Q.No. 42)
Elements of Remote Sensing
42.
Pick up the correct statement from the following :
The first man-made satellite, Sputnikl' was launched on 4th October, 1957
The United State's Explorer 6 transmitted the first picture of the earth in August 1959
Television Infrared Observation Satellite (TIROS) designed for meteorological observations, started systematic earth observations from space from 1, April, 1960
U.S.A.'s highly secret mission CORONA started the collection of intelligence photograpy in 1960
All of these.
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