- Relay 1
Relay 1 was principally a communications
satellite. It was launched atop a Delta rocketon December 13 1962from LC-17at Cape Canaveral Air Force Station. Included in its payload were radiationexperiments designed to map the earth's radiation belts. The spin-stabilized spacecrafthad an initial spin rate of 167.3 rpm and an initial spin axis orientation with a declination of -68.3 deg and a right ascension of -56 deg. Shortly after launch, two basic problems evolved. One was the satellite's response to spurious commands, and the other was the leakage of a high-power regulator. This leakage caused the first 2 weeks of satelliteoperation to be useless. After this period, satellite operation returned to normal. The satellitecarried one transmitter for tracking and one for telemetry. The telemetry system was PCM at 1152 bit/s. Each 128 words per telemetry frame (of 1 s duration) used 113 words for the particle experiment. The leakage problem caused the spacecraftto revert to a low voltage state early in 1965. Sporadic transmission occurred until February 10, 1965, after which no usable scientific data were obtained. See also: 1962 in spaceflight.
* [http://nssdc.gsfc.nasa.gov/nmc/masterCatalog.do?sc=1962-068A NASA Relay 1]
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