International Telemetering Conference Proceedings, Volume 14 (1978)http://hdl.handle.net/10150/5784392024-03-28T17:08:51Z2024-03-28T17:08:51ZInternational Telemetering Conference Proceedings, Volume 14 (1978)http://hdl.handle.net/10150/6665122022-10-30T01:08:44Z1978-11-01T00:00:00ZInternational Telemetering Conference Proceedings, Volume 14 (1978)
International Telemetering Conference Proceedings / November 14-16, 1978 / Hyatt House Hotel, Los Angeles, California
1978-11-01T00:00:00ZAppendix: Sixteenth Annual Report of the Telemetering Standards Coordination CommitteeJeske, Haroldhttp://hdl.handle.net/10150/6099912020-04-02T11:57:02Z1978-11-01T00:00:00ZAppendix: Sixteenth Annual Report of the Telemetering Standards Coordination Committee
Jeske, Harold
International Telemetering Conference Proceedings / November 14-16, 1978 / Hyatt House Hotel, Los Angeles, California
1978-11-01T00:00:00ZPhase Referencing for MA Demultiplexing in the TDRSSGagliardi, R. M.http://hdl.handle.net/10150/6099892020-04-02T08:37:38Z1978-11-01T00:00:00ZPhase Referencing for MA Demultiplexing in the TDRSS
Gagliardi, R. M.
The TDRSS performance is based, to a large extent, on the ability to maintain phase coherency between user, satellite, and ground segment. This is especially true for the MA return subsystem, which uses coherent referencing for multiplexing and demultiplexing between the TDRS and ground processor. Phase noise appearing on these referencing waveforms destroy the phase coherency, and will degrade the overall MA return operation. In this paper the manner in which this phase referencing is achieved is described. In addition, the results of a preliminary study to distinguish the key MA return phase noise sources, and the manner in which each will ultimately influence performance, is presented. The results show that the return phase noise effects can be separated into "coherent" and "noncoherent" contributions, and each must be separately evaluated. The effect of the various tracking loop bandwidths throughout the link is shown, and the manner in which the specific phase noise spectra are eventually filtered is developed.
International Telemetering Conference Proceedings / November 14-16, 1978 / Hyatt House Hotel, Los Angeles, California
1978-11-01T00:00:00ZTIPS Real Time Acquisition, Processing and Display SubsystemStraehley, Erwin H.http://hdl.handle.net/10150/6099882020-04-02T09:08:40Z1978-11-01T00:00:00ZTIPS Real Time Acquisition, Processing and Display Subsystem
Straehley, Erwin H.
The requirement to acquire, process, and display telemetry data from increasingly sophisticated test vehicles in real time is one of the, principal parameters that shaped the SAMTEC Telemetry Integrated Processing System (TIPS) design. An integrated subsystem incorporating advances in hardware design, linked by a multi-processor software element implementing three distinct processing functions to fill this requirement, is described in this paper. Most of the hardware elements, except the processor, were designed to meet the specific requirements of this system. This includes telemetry front-end acquisition equipment, electrostatic high speed printer plotters, plasma keyboard displays, and wide band links to transfer data from element to element. The processors are 32-bit word third generation midi-computers. Each element was selected or specified primarily for its ability to perform at the expected incoming data rates. The Real Time Acquisition (RTA) Software is partitioned into an executive function, an acquisition and event processing function, and a display processing function. Each function resides in its own specific computer configuration. The acquisition configuration (TPP) and display configuration (QLDA) are each replicated to provide multi-input stream and multiple independent display capabilities. Real time requirements, similar to those at SAMTEC, are evolving elsewhere. The hardware and software components described herein are easily adaptable to satisfy these requirements at a variety of other advanced telemetry data processing facilities.
International Telemetering Conference Proceedings / November 14-16, 1978 / Hyatt House Hotel, Los Angeles, California
1978-11-01T00:00:00Z