Download e-book for iPad: Trends in Communications Satellites by Denis J Curtin

By Denis J Curtin

ISBN-10: 0080232256

ISBN-13: 9780080232256

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68-70% fraction fill. The receivers on the INTELSAT IV-A program have been modified to ensure longer life. Microwave transistor amplifiers have been added in parallel with the driver TWTs. In addition, the driver TWTs all have standard cathode coatings. No degradation of receiver performance has been reported to date. The INTELSAT IV-A antennas are all located on one end of the satellite, resulting in a much larger distance between the effective center of pressure and the center of mass. 06° per day.

39, 78-82. Martin, E. (1971) Experimental investigations on the fuel slosh of dual-spin spacecraft. COMSAT Tech. Rev. 1, 1-20. , Private Communication. Morgan, W. L. (1974) Communications satellites and new technology. Microwave Sys. 2, 64-68. R. (1976) INTELSAT satellites on-board propulsion systems. AIAA paper 76-289. Pentlicki, C. (1973) Investigations of the INTELSAT IV bearing and power transfer assembly. COMSAT Tech. Rev. 3, 75-88. Rosen, A. (1976) Spacecraft charging by magnetospheric plasmas.

An estimate of the orbital load summary is given in Table 4. Table 4. Early estimate of INTELSAT V power/load summary Power (W)* Subsystem Communications Two on each: Telemetry, Command, Receiver, and LO Transister ADAC (including S/A drive) Propulsion (excluding electrothermal thruster) Electrical Power Subsystem Harness Loss Thermal Control (including batteries) Total Bus No. 1 and No. 2% ♦Estimated as of March 1977. 5 V. 2 h. The batteries will be kept at temperatures between 6°C and 24°C during the satellite lifetime.

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Trends in Communications Satellites by Denis J Curtin

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