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

CCSDS RADIO FREQUENCY AND MODULATION SYSTEMS REPORTEarth Stations4.0 ELECTRICAL CHARACTERISTICSThis section contains information describing the electrical characteristics of the several CCSDSAgencies' earth stations. Issue-1 of this Report separated electrical capabilities for Category A andCategory B missions. That distinction has been eliminated in this edition. Generally, Category Bmissions demand greater performance from earth stations because of their very great distances andconcomitantly weak signals. However, many of the capabilities required to support the twocategories are very similar.Where possible, data are provided by subnetwork rather than by station. A subnetwork consists oftwo or more stations with sufficiently similar electrical characteristics so that they areindistinguishable from one another. While such stations may have differing geographical locationsor mechanical configurations, they appear to have identical communications link capabilities.NASA's three 70-meter stations situated in the USA, Australia, and Spain, which are operated theDeep Space Network, are an example of a subnetwork.As with earlier chapters, Section 4 is organized alphabetically by Agency. Each Agency's material isfurther subdivided into Earth-to-Space, Space-to-Earth, Radio Metric, Frequency and TimingSystem and Geographical and Mechanical modules. The Geographical and Mechanical moduleis new with this issue and has been added pursuant to an agreement with CCSDS Subpanel 1D.These five modules are arranged in the order listed for each pair of stations or subnetworks so thata full description of each facility will be found in a consecutive set of four sheets. If a CCSDSAgency has more than two stations or subnetworks, additional sets of four modules are utilizeduntil that agency's tracking system is fully described.Capabilities are described using a tabular format. Characteristics appear in the left-most column,followed to the right by a column showing the units in which that characteristic is specified.Sufficient station or subnetwork descriptions are provided at the top of the right two columns sothat a reader can easily correlate the data in that column with information about the same facilityfound in other parts of this Report.A note stating: SOME LIMITATIONS APPLY TO THIS CAPABILITY will be found in the notes atthe bottom of the page. When such limitations apply, superscript number will be placed next to therelevant characteristic in the table. Users of the Report are then on notice to carefully check themarked data to determine the nature of these restrictions, either by consulting the referencescontained in section 5, or by contacting the specific organization responsible for the facility.CCSDS 411 G-3 4.0-1 May 1997