http://hdl.handle.net/10150/578393 2026-05-14T18:35:54Z 2026-05-14T18:35:54Z http://hdl.handle.net/10150/666506 2022-10-30T01:07:40Z 1972-10-01T00:00:00Z

International Telemetering Conference Proceedings, Volume 08 (1972) International Telemetering Conference Proceedings / October 10-12, 1972 / International Hotel, Los Angeles, California

1972-10-01T00:00:00Z McKelvey, G. R. http://hdl.handle.net/10150/605815 2024-08-03T05:44:06Z 1972-10-01T00:00:00Z

RECORDER PARAMETERS AFFECTING BIT ERROR RATE McKelvey, G. R. Instrumentation magnetic tape is the primary storage medium employed to store PCM telemetry data representing billions of dollars of expended effort. Considerable data are lost in the recording and playback processes which could be retrieved through proper equipment alignments. The major contributors to the data losses are discussed, and the test methods used to determine the resultant loss for each factor are explained. It is shown that equipment alignment becomes critical as PCM bit rates approach one megabit. International Telemetering Conference Proceedings / October 10-12, 1972 / International Hotel, Los Angeles, California

1972-10-01T00:00:00Z Dicks, J. L. http://hdl.handle.net/10150/605814 2024-08-03T05:43:47Z 1972-10-01T00:00:00Z

DESIGN OPTIONS FOR FUTURE COMMUNICATIONS SATELLITES Dicks, J. L. The INTELSAT global system of communications satellites in operation today is a development covering four generations of satellites. Starting with the INTELSAT I or “Early Bird” satellite launched in 1965, each succeeding satellite series has provided more capability by the introduction of new coverage areas or increased telephony and television capacity Today with the INTELSAT III and IV satellites in operation, service is being provided between earth stations around the world of a quality that meets all appropriate CCIR and CCITT requirements. In this paper, the global network is examined with a view to determining those technical factors that impact on the design options of communications satellites of the future. The factors and trends expected to influence future satellite designs and configurations are discussed. Specifically these are derived from analyses of the volume and the distribution in each ocean area of the system traffic, from analysis of the available modulation and multiple access techniques, from estimates of possible traffic growth rates for the time frames of interest, as well as from considerations of the availability of launch vehicles, of the present and future state of technology, of reliability and continuity of service requirements and of impact on earth station design and modifications. International Telemetering Conference Proceedings / October 10-12, 1972 / International Hotel, Los Angeles, California

1972-10-01T00:00:00Z Heynisch, B. http://hdl.handle.net/10150/605577 2024-08-03T05:43:47Z 1972-10-01T00:00:00Z

RECENT DEVELOPMENT RESULTS ON THE HELIOS S-BAND COMMAND RECEIVER Heynisch, B. By joint effort of the US and West Germany a Sunprobe will be launched by 1974 named HELIOS. In the Telecommunications Subsystem the Telecommand Receiver has a keyrole as Experiments have to be switched up to 2 AU distance from earth. The input power at the Receiver Equipment input terminal is -147 dbm with SNR of 6 db in 2 BL(o) = 32,5 Hz Loop Bandwidth. To achieve this sensitivity a Receiver in Phaselocked loop techniques with a low noise Preamplifier had to be developed. In cooperation and with consultance of well known US-Scientists it was possible to design and develope the S-Band Receiver up to the Qualifikation Model in less than two years. This report shall give a survey over concept and design of the receiver and some special experiences during development and integration tests. International Telemetering Conference Proceedings / October 10-12, 1972 / International Hotel, Los Angeles, California

1972-10-01T00:00:00Z