Transmitting apparatus for use in non-geostationary satellites

Details Transmitting apparatus for use in non-geostationary satellites Transmitting apparatus for use in non-geostationary satellites

1995-10-31

1998-12-01

Chin, Wellington

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

455 131, 455 134, 244171, 342354, H04B 7185

Patent

active

058451935

ABSTRACT:
A transmitting apparatus for use in non-geostationary satellites which allows compliance with the restrictions placed on PFD even when the Earth is located between the geostationary satellite and the non-geostationary satellite. The transmitting apparatus 10 for use in non-geostationary satellites having a transmitting section 16 which sends a transmitting signal to the geostationary satellite, comprises an Earth-sensing section 19 for detecting the presence of the Earth in the direction of transmission and a transmission direction-shifting section 20 for shifting the direction of transmission of the transmitting signal in response to detection of the Earth-sensing section 19 to prevent the Earth from being exposed to the transmitting signal. Instead of the transmission direction-shifting section 20, there may be used a power supply-suspending section which automatically suspends power supply to the transmitting section 16 thereby stopping transmission of the transmitting signal.

REFERENCES:
patent: 4318517 (1982-03-01), Salkeld et al.
patent: 5119225 (1992-06-01), Grant et al.
patent: 5184139 (1993-02-01), Hirako et al.
patent: 5390338 (1995-02-01), Bodin et al.
Y. Wakabayashi, et al., "Research and Development of Precision Earth Sensor", SPIE-The International Society for Optical Engineering, vol. 1157, Aug. 7-9, 1989, Reprinted from Infrared Technology XV, pp. 299-308.

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