M00017597
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ISO DIS 18423 2014 Edition, September 30, 2014 SPACE DATA AND INFORMATION TRANSFER SYSTEMS - PSEUDO-NOISE (PN) RANGING SYSTEMS
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Description / Abstract:
This Recommended Standard defines both transparent and
regenerative PN ranging systems for non–data relay satellite users.
The specification for PN code components and generation, on-board
spacecraft regenerative/transparent processing, ground station
processing, and uplink and downlink signal modulation are defined
in this document. This Recommended Standard does not specify a)
individual implementations or products, b) implementation of
service interfaces within real systems, or c) the management
activities required to configure and control the protocol.
PURPOSE
The purpose of this document is to provide a Recommendation for
Space Data System Standards in the area of transparent1
and regenerative Pseudo-Noise (PN) ranging systems. The PN ranging
system is used to measure the round-trip light time between a
ground station and a spacecraft. Regenerative ranging is primarily
relevant for low Signal-to-Noise Ratio (SNR) cases like those seen
in deep space missions; transparent ranging is more suitable for
high SNR cases or when high accuracy ranging is not required.
1 The term ‘transparent ranging' is used in
this standard to mean non-regenerative ranging or turn-around
ranging.