ISO 17810:2014

Overview

ISO 17810:2014 - "Space data and information transfer systems - Data transmission and pseudo-random noise (PN) ranging for 2 GHz code division multiple access (CDMA) link via data relay satellite" - is an international standard that formalizes CDMA spread‑spectrum modulation and PN‑ranging procedures for 2 GHz data relay links. Adopted from CCSDS 415.1-B-1, it defines the services, spreading code formats and the procedures to generate and process PN (pseudo‑random noise) codes for Direct Sequence Spread Spectrum (DSSS) CDMA links used in cross‑agency space communications.

The standard focuses on signal and code format compatibility (not product designs). It ensures interoperability between CCSDS member agencies and alignment with existing SNIP PN spread modulation systems (e.g., PN Gold and maximal‑length codes), while leaving implementation choices, management procedures and many non‑PN signal requirements (such as forward error correction and higher‑level data formats) to agency standards and mission agreements.

Key Topics and Requirements

• CDMA spread‑spectrum modulation definitions for 2 GHz relay links, including DSSS techniques and PN code libraries.
• PN code formats and properties (Gold codes, maximal‑length codes) and procedures to generate/process these codes for ranging and data channels.
• Service descriptions for forward and return links, coherent return modes, command and range channels, and time transfer capabilities.
• Signal compatibility parameters required to interoperate with existing SNIP PN spread modulation systems (parameter requirements only; not implementation specifics).
• Inter‑agency cross‑support provisions: mandatory capabilities must be implemented for cross support; optional features require bilateral agreements.
• Scope limits: does not specify hardware designs, specific technologies for performing procedures, or configuration/management activities.

Keywords: ISO 17810:2014, CDMA 2 GHz, PN ranging, DSSS, PN Gold codes, CCSDS, SNIP, data relay satellite, spread spectrum.

Applications and Users

• Agencies and organizations developing inter‑agency mission plans or standards for space data relay services and cross‑support.
• Spacecraft and ground‑station engineers designing CDMA 2 GHz links for data relay via relay satellites.
• Systems architects defining signal formats and interoperability requirements between CCSDS agencies.
• Test and operations teams performing ranging, tracking, and time transfer that rely on PN spread modulation.

Practical value: ISO 17810:2014 provides a common technical baseline for compatibility of PN spread CDMA signaling across agencies, reducing integration risk in cross‑supported missions and enabling consistent PN code libraries and procedures for ranging and data transmission.

Related Standards

• CCSDS Recommended Standard CCSDS 415.1-B-1 (basis for ISO 17810:2014)
• References to SNIP PN spread modulation practices and other CCSDS standards for data formats, forward error correction and space link protocols (agencies should consult related CCSDS/ISO documents when implementing full systems).