International Organization for Standardization

Space data and information transfer systems - Proximity-1 space link protocol - Physical layer - Third Edition
 N 21460

Annotation

This Recommended Standard defines the Proximity-1 Space Link Protocol Physical Layer. The specification for the channel connection process, provision for frequency bands and assignments, hailing channel, polarization, modulation, data rates, and performance requirements are defined in this document.

Currently, the Physical Layer only defines operations at UHF frequencies for the Mars environment.

The Data Link Layer is defined in the two separate CCSDS Recommended Standards entitled, Proximity-1 Space Link Protocol—Coding and Synchronization Sublayer (reference [2]), and Proximity-1 Space Link Protocol—Data Link Layer (reference [3]).

This Recommended Standard does not specify

a) individual implementations or products;

b) implementation of service interfaces within real systems;

c) the methods or technologies required to perform the procedures; or

d) the management activities required to configure and control the protocol.

PURPOSE

The purpose of this Recommended Standard is to specify Physical Layer procedures used with the Proximity-1 Data Link Layer (references [3] and [2]). Proximity space links are defined to be short-range, bi-directional, fixed or mobile radio links, generally used to communicate among probes, landers, rovers, orbiting constellations, and orbiting relays. These links are characterized by short time delays, moderate (not weak) signals, and short, independent sessions.