| Operator | Institute of Space and Astronautical Science |
|---|---|
| COSPAR ID | 1972-064A  |
| SATCAT no. | 06152 |
| Start of mission | |
| Launch date | 19 August 1972 (1972-08-19Z) UTC[1] |
| Launch site | Kagoshima Space Center |
| End of mission | |
| Decay date | 19 May 1980 (1980-05-20) |
Denpa (電波, denpa, literally, "electromagnetic wave"), also known as REXS (Radiation EXperiments Satellite), was a Japanese satellite.[2] The launch was a project of the Institute of Space and Astronautical Science of the University of Tokyo. The satellite was launched on February 19, 1972.[3] Its objective was to conduct measurements in the magnetosphere. It failed shortly after launch; a later report concluded that the transmitter failed due to a high voltage arc.[2]
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