Report: RF&Mod Systems-Part 1: Earth Stations - CCSDS

CCSDS RADIO FREQUENCY AND MODULATION SYSTEMS REPORTEarth Stations1.0 INTRODUCTION1.1 PURPOSEThis Report summarizes the characteristics and capabilities of Consultative Committee for SpaceData Systems (CCSDS) Agencies' Earth Stations. It has been designed to:(1) Serve as a reference work for persons seeking information about earth stationsoperated by CCSDS space agencies.(2) Facilitate cross-support of one agency's spacecraft by another agency's trackingsystem by providing spacecraft designers with CCSDS Agencies' earth stationlocations and nominal operating parameters.This document is a CCSDS informational Report and, therefore, is not to be construed as a CCSDSRecommendation for Data System Standards.1.2 SCOPEThe RF and Modulation system characteristics found in this Report are designed for the support ofconventional, contemporary, free flyer spacecraft. The capabilities enumerated herein, are thosethat the CCSDS Agencies state are either in place or will be constructed within the next two years.It is expected that these data will be valid for the 1996-2001 time period.1.3 BACKGROUNDAs space missions have become more expensive, the search for methods to improve efficiency hasintensified. One approach offering great potential focuses upon multi-mission designs in order toavoid early obsolescence. Data handling systems are attractive candidates for the multi-missionconcept because of their high cost of redesign and because the process should be amenable to a highdegree of uniformity.However, multi-mission systems require the designer to exercise great care to ensure flexibilitywithout sacrificing efficiency. Each step of the process must be examined to determine whether ithas been optimized to meet the requirements and constraints imposed by a variety of users. Theend product of this analytical process is a set of guidelines or recommendations which govern theimplementation of future systems.By cooperating in the specification of their data systems, CCSDS members should achievesignificant uniformity. Apart from improving the design, this unified approach will facilitate thecross-support of one Agency's spacecraft by the other Agency's tracking network.CCSDS 411 G-3 1.0-1 May 1997