Space Link Services Area

The Space Link Services Area (SLS) supports the work of the CCSDS by developing efficient space link communications systems common to all participating agencies. A space link interconnects a spacecraft with its ground support system or with another spacecraft. Agencies' new generations of space missions require telecommand and telemetry capabilities beyond current technologies. These new needs are for higher data rates, better link performances, more performing ranging systems, together with lower cost, mass and power and higher security.
More specifically, the SLS Area concentrates on layers 1 and 2 (of OSI protocol stack), namely: RF and modulation, channel coding and data link layer, for both long-haul (e.g.: spacecraft to ground) and proximity links (e.g.: orbiter to lander). Two additional functions are also covered by the SLS area: data compression for end to end data transfer optimization, and ranging for accurate orbit determination. The area is composed of specialized working group whose objective is to develop specific recommendations. One recommendation will typically cover one OSI layer or sub-layer. This layering of recommendations maximizes flexibility and interoperability with other commercial protocols (e.g. : TCP/IP).
Note - CCSDS Experimental Specification (Orange Books) indicates that it is part of a research or development effort based on prospective requirements, and as such it is not considered a Standards Track document. Experimental Recommendations are intended to demonstrate technical feasibility in anticipation of a 'hard' requirement that has not yet emerged. Experimental work may be rapidly transferred onto the Standards Track should a hard requirement emerge in the future.
Patent licensing may apply to various documents below. Look for the "Patent Licensing" entry for the necessary patent information that is included in the document. For the ISO patent declaration form associated with this document.

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Currently 46 Books Listed
Lossless Data Compression. Green Book. Issue 3. April 2013.
This Report presents a summary of the key operational concepts and rationale underlying the requirements for the CCSDS Recommended Standard for Lossless Data Compression. Supporting performance information along with illustrations are also included. This Report also provides a broad tutorial overview of the CCSDS Lossless Data Compression algorithm and is aimed at helping first-time readers to understand the Recommended Standard. The current issue updates material affected by revision of the Lossless Data Compression Blue Book.
Image Data Compression. Green Book. Issue 2. February 2015.
This Informational Report presents a summary of the key operational concepts and rationale which underlie the requirements for the CCSDS Recommended Standard, Image Data Compression (CCSDS 122.0-B-1). Supporting performance information along with illustrations are also included. This report provides a broad tutorial overview of the CCSDS Image Data Compression algorithm and is aimed at helping first-time readers to understand the Recommended Standard.
Lossless Multispectral and Hyperspectral Image Compression. Green Book. Issue 1. December 2015.
This Informational Report presents a summary of the key operational concepts and rationale that underlie the requirements for the CCSDS Recommended Standard for Lossless Multispectral & Hyperspectral Image Compression, CCSDS 123.0-B-1, and provides a broad tutorial overview of algorithm.
Lossless Data Compression. Blue Book. Issue 2. April 2012.
This Recommended Standard defines a source-coding data-compression algorithm and specifies how data compressed using the algorithm are inserted into source packets for retrieval and decoding. Issue 2: - increases the allowed values of block length J from {8, 16} to {8, 16, 32, 64}; - increases the maximum allowed value of the reference sample interval r from 256 to 4096; - allows the use of a restricted set of code options - defines a new subfield of the Source Configuration Field of the optional Compression Identification packet; - adds guidance for selection of code option when two or more code options gave the same performance for a block; - updates nomenclature subsection; - clarifies some text; - adds a dedication to Warner Miller.
Image Data Compression. Blue Book. Issue 2. September 2017.
This Recommended Standard defines an image-data compression algorithm applicable to digital data from payload instruments and specifies means to control compression rate and how these compressed data shall be inserted into source packets for retrieval and decoding. The current issue adds modifications to support the Recommended Standard for Spectral Pre-Processing Transform for Multispectral and Hyperspectral Image Compression.
Spectral Preprocessing Transform for Multispectral and Hyperspectral Image Compression. Blue Book. Issue 1. September 2017.
This Recommended Standard is an extension to CCSDS 122.0-B-2, Image Data Compression (Blue Book, Issue 2), defining a data compression algorithm that can be applied to digital three-dimensional image data from payload instruments, such as multispectral and hyperspectral imagers, and specifying the compressed data format.
Lossless Multispectral & Hyperspectral Image Compression. Blue Book. Issue 1. May 2012.
This Recommended Standard specifies a method for lossless compression of multispectral and hyperspectral image data and a format for storing the compressed data.
Overview of Space Communications Protocols. Green Book. Issue 3. July 2014.
This Report provides an architectural overview of the space link protocols recommended by CCSDS and shows how these protocols are used in space mission data systems.
CCSDS Protocols over DVB-S2--Summary of Definition, Implementation, and Performance. Green Book. Issue 1. November 2016.
This document is a CCSDS Informational Report that contains background and explanatory material to support the CCSDS Recommended Standard for CCSDS Space Link Protocols over ETSI DVB-S2 Standard.
TM Synchronization and Channel Coding--Summary of Concept and Rationale. Green Book. Issue 2. November 2012.
This Informational Report contains the concept and supporting rationale for the TM Synchronization and Channel Coding Recommended Standard and includes performance data and historical background information on code selection.
Space Data Link Protocols--Summary of Concept and Rationale. Green Book. Issue 3. September 2015.
This CCSDS Informational Report contains background and explanatory material to support the CCSDS Recommended Standards on the TC, TM, and AOS Space Data Link Protocols and Communications Operation Procedure-1 that accompanies the TC Space Data Link Protocol.
TM Synchronization and Channel Coding. Blue Book. Issue 3. September 2017.
The Recommended Standard for TM Synchronization and Channel Coding contains specifications to be used by space missions on synchronous communications links. The current update adds LCPC coding for a stream of Sync-Marked Transfer Frames (SMTFs).
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CCSDS 131.1-O-1-S
File size 1130 KB
Low Density Parity Check Codes for Use in Near-Earth and Deep Space Applications. Silver Book. Issue 1. August 2006.
This CCSDS Experimental specification is a NASA contribution to the CCSDS Space Link Coding and Synchronization Working Group. The document describes a set of Low Density Parity Check (LDPC) codes, including definition of their code structures, encoder implementations and experimental performance results.
Flexible Advanced Coding and Modulation Scheme for High Rate Telemetry Applications. Blue Book. Issue 1. March 2012.
This Recommended Standard defines a Serially Concatenated Convolutional turbo Coding (SCCC) scheme for telemetry applications.
CCSDS Space Link Protocols over ETSI DVB-S2 Standard. Blue Book. Issue 1. March 2013.
This CCSDS Recommended Standard defines a recommended interface between CCSDS Space Link Protocols and the DVB-S2 telecom standard, and recommends options of the DVB-S2 standard suited to high data rate telemetry applications, such as Earth Exploration Satellite Services (EESS) payload telemetry.
Erasure Correcting Codes for Use in Near-Earth and Deep-Space Communications. Orange Book. Issue 1. October 2014.
This Experimental Specification defines efficient erasure coding and decoding strategies for future space missions.
TM Space Data Link Protocol. Blue Book. Issue 2. September 2015.
The CCSDS Recommended Standard for TM Space Data Link Protocol specifies the protocol, services, and procedures pertaining to the CCSDS Version-1 Synchronous Transfer Frame. The current issue adds specifications to support the Space Data Link Security Protocol.
Space Packet Protocol. Blue Book. Issue 1. September 2003.
This Recommendation specifies the protocols, services, and procedures pertaining to the CCSDS Packet. These specifications correspond with CCSDS Source Packet specifications contained in Packet Telemetry, Packet Telemetry Service Specification, Telecommand Part 3—Data Management Service, and Advanced Orbiting Systems, Networks and Data Links: Architectural Specification. (Note: This is a restructured Recommendation*.) The current version of this document contains all updates through technical corrigendum 2, dated September 2012.
Technical Corrigendum 1 to CCSDS 133.0-B-1, Issued September 2003. Blue Book. Issue 1 Cor. 1. September 2010.
Technical Corrigendum 2 to CCSDS 133.0-B-1, Issued September 2003. Blue Book. Issue 1 Cor. 2. September 2012.
This Technical Corrigendum documents changes to CCSDS 133.0-B-1, Space Packet Protocol (Blue Book, Issue 1, September 2003).
Encapsulation Service. Blue Book. Issue 2. October 2009.
The CCSDS Recommended Standard for Encapsulation Service specifies a communications service to be used by space missions to transfer protocol data units that are not directly transferred by the Space Data Link Protocols over a ground-to-space or space-to-space communications link. The current update adds corrections and clarifications to the specification. The current version of this document contains all updates through technical corrigendum 2, dated April 2014. This document has been reconfirmed by the CCSDS Management Council through October 2021.
Technical Corrigendum 1 to CCSDS 133.1-B-2, Issued October 2009. Blue Book. Issue 2 Cor. 1. September 2012.
This Technical Corrigendum documents changes to CCSDS 133.1-B-2, Encapsulation Service (Blue Book, Issue 2, October 2009).
Technical Corrigendum 2 to CCSDS 133.1-B-2, Issued October 2009. Blue Book. Issue 2 Cor. 2. April 2014.
This Technical Corrigendum documents changes to CCSDS 133.1-B-2, Encapsulation Service (Blue Book, Issue 2, October 2009).
Real-Time Weather and Atmospheric Characterization Data. Green Book. Issue 1. May 2017.
This Informational Report identifies and describes the atmospheric constituents that are most responsible for transmission losses in optical communications links at wavelengths near 1550 and 1064 nm. Considerations concerning the temporal measurement of the atmospheric parameters are discussed, along with the possible ways the data can be used for long-term ETS characterization and real-time operations, including handover prediction support.
Telecommand Summary of Concept and Rationale. Green Book. Issue 6. January 1987.
In order to establish a common framework within which the Agencies may develop standardized telecommand services, the CCSDS advocates adoption of a layered systems architecture. Within this approach, specific layers of service (including their operational protocol and data structuring techniques) may be selected for implementation according to mission requirements. The current layered set of CCSDS telecommand Recommendations was developed to match the conventional free-flying mission environment, as characterized by the transmission of command data at relatively low uplink data rates to spacecraft of moderate complexity. This Report summarizes the principal concepts associated with the CCSDS recommended space mission telecommanding architecture. This document has been reconfirmed by the CCSDS Management Council through October 2021.
Proximity-1 Space Link Protocol--Rationale, Architecture, and Scenarios. Green Book. Issue 2. December 2013.
This Report contains background and explanatory material to support the CCSDS Recommended Standards for Proximity-1 Space Link Protocol (CCSDS 211.0-B, CCSDS 211.1-B, and CCSDS 211.2-B).
Proximity-1 Space Link Protocol--Data Link Layer. Blue Book. Issue 5. December 2013.
The CCSDS Recommended Standard for Proximity-1 Space Link Protocol—Data Link Layer specifies the protocol, services, and procedures pertaining to the CCSDS Version-3 Transfer Frame. The current issue includes several improvements and clarifications—accomplishing better alignment and consistency with the other Proximity-1 Blue Books—and the addition of an option for Low Density Parity-Check (LDPC) codes.
Proximity-1 Space Link Protocol--Physical Layer. Blue Book. Issue 4. December 2013.
The CCSDS Recommended Standard for Proximity-1 Space Link Protocol—Physical Layer specifies the Physical Layer procedures used with the Proximity-1 Data Link Layer. The current issue includes several improvements and clarifications, accomplishing better alignment and consistency with the other Proximity-1 Blue Books.
Proximity-1 Space Link Protocol--Coding and Synchronization Sublayer. Blue Book. Issue 2. December 2013.
The CCSDS Recommended Standard for Proximity-1 Space Link Protocol—Coding and Synchronization Sublayer specifies the synchronization and channel coding schemes used with the Proximity-1 Data Link Protocol. The current issue includes several improvements and clarifications-accomplishing better alignment and consistency with the other Proximity-1 Blue Books—and the addition of an option for Low-Density Parity-Check (LDPC) codes.
TC Synchronization and Channel Coding--Summary of Concept and Rationale. Green Book. Issue 2. November 2012.
This Informational Report contains the concept and supporting rationale for the TC Synchronization and Channel Coding Recommended Standard and includes performance data and historical background information on code selection.
Next Generation Uplink. Green Book. Issue 1. July 2014.
This CCSDS Informational Report discusses a future set (next generation) of telecommand recommendations for space missions.
TC Synchronization and Channel Coding. Blue Book. Issue 3. September 2017.
The Recommended Standard for TC Synchronization and Channel Coding contains specifications for synchronization and channel coding to be used by space missions on asynchronous communications links. The current issue adds LCPC coding; globally changes 'codeblock' to 'codeword' for consistency with modern usage; deletes obsolete annex detailing changes from documents retired in 2005.
Short Block Length LDPC Codes for TC Synchronization and Channel Coding. Orange Book. Issue 1. April 2015.
This CCSDS Experimental Specification defines a set of short block length Low Density Parity Check (LDPC) codes intended for telecommand applications.
TC Space Data Link Protocol. Blue Book. Issue 3. September 2015.
The Recommended Standard for TC Space Data Link Protocol specifies the protocol, services, and procedures pertaining to the CCSDS Version-1 Asynchronous Transfer Frame. The current issue adds specifications to support the Space Data Link Security Protocol.
Communications Operation Procedure-1. Blue Book. Issue 2. September 2010.
This Recommended Standard specifies the Communications Operation Procedure-1 used by the TC Space Data Link Protocol. The current issue adds text concerning a new systematic retransmission option. This document has been reconfirmed by the CCSDS Management Council through April 2021.
Space Data Link Security Protocol--Summary of Concept and Rationale. Green Book. Issue 1. June 2018.
This Informational Report presents the concept and rationale for the CCSDS Recommended Standard on the Space Data Link Security Protocol.
Space Data Link Security Protocol. Blue Book. Issue 1. September 2015.
This Recommended Standard specifies a security protocol for CCSDS data links. The protocol provides a security header and trailer along with associated procedures that may be used with the CCSDS Telemetry, Telecommand, and Advanced Orbiting Systems Space Data Link Protocols to provide a structured method for applying data authentication and/or data confidentiality at the Data Link layer.
Radio Frequency and Modulation Systems--Part 1: Earth Stations and Spacecraft. Blue Book. Issue 28. February 2018.
Numerous concise recommendations appear in the notebook volume bearing the number 401.0-B. Each recommendation is dated, and the most recent revision is shown in the table of contents. These Recommendations are developed for conventional near-Earth and deep-space missions having moderate communications requirements. The current issue updates recommendations 2.1.4A and 2.1.4B, deletes recommendations 2.1.8A and 2.1.8B, and adds new recommendation 2.6.11A.
Bandwidth-Efficient Modulations--Summary of Definition, Implementation, and Performance. Green Book. Issue 3. February 2018.
This Report contains technical material to supplement the CCSDS Recommendations for the standardization of modulation methods for high symbol rate transmissions generated by CCSDS Member Agencies.
Simultaneous Transmission of GMSK Telemetry and PN Ranging. Green Book. Issue 1. May 2017.
This Informational Report is an adjunct document to the CCSDS Recommended Standard for Pseudo-Noise (PN) Ranging Systems (CCSDS 414.1-B-1). It provides background information and discussion of technical details related to the PN ranging systems defined by the CCSDS Recommended Standard.
Pseudo-Noise (PN) Ranging Systems. Green Book. Issue 2. February 2014.
This Informational Report is an adjunct document to the CCSDS Recommended Standard for Pseudo-Noise (PN) Ranging Systems (CCSDS 414.1-B-1). It provides background information and discussion of technical details related to the PN ranging systems defined by the CCSDS Recommended Standard.
Pseudo-Noise (PN) Ranging Systems. Blue Book. Issue 2. February 2014.
The Pseudo-Noise (PN) Ranging Systems Recommended Standard defines both transparent and regenerative PN ranging systems.
Data Transmission and PN Ranging for 2 GHz CDMA Link via Data Relay Satellite. Green Book. Issue 1. April 2013.
This Informational Report describes the concepts and the use of spread-spectrum modulation in existing Radio Frequency (RF satellite communications systems and is intended as a supplement to the CCSDS Code Division Multiple Access (CDMA Recommended Standard (CCSDS 415.1-B-1). The CCSDS conducts periodic reconfirmation reviews of its publications to assure their continued relevance. This Informational Report has been reconfirmed through April 2023.
Data Transmission and PN Ranging for 2 GHz CDMA Link via Data Relay Satellite. Blue Book. Issue 1. September 2011.
This Recommended Standard specifies a set of Code Division Multiple Access (CDMA) spread spectrum modulation schemes for CCSDS Users. These schemes are intended to be used over space-to-space communications links by space missions. This document has been reconfirmed by the CCSDS Management Council through October 2021.
Report of the Proceedings of the RF and Modulation Subpanel Meeting at the Ames Research Center, April 11-20, 1989. Green Book. Issue 1. September 1989.
This Report is a collection of papers presented to the CCSDS RF and Modulation Subpanel Meeting in April 1989. The original printed volume has been scanned in order to make it available for on-lineviewing and downloading. Optical Character Recognition (OCR) has been applied to the file in order to make it searchable; however, OCR errors are to be expected, and only the scanned page images can be considered to represent original document content with fidelity.
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CCSDS 700.0-G-3
File size 174 KB
Advanced Orbiting Systems, Networks and Data Links: Summary of Concept, Rationale and Performance. Green Book. Issue 3. November 1992.
This CCSDS Report contains background and explanatory material to supplement the CCSDS Recommendation, Advanced Orbiting Systems, Network and Data Links: Architectural Specification, 701.0-B-2. This document has been reconfirmed by the CCSDS Management Council through October 2021.
AOS Space Data Link Protocol. Blue Book. Issue 3. September 2015.
The CCSDS Recommended Standard for AOS Space Data Link Protocol specifies the protocol, services, and procedures pertaining to the CCSDS Version-2 Transfer Frame. The current issue adds specifications to support the Space Data Link Security Protocol.
Unified Space Data Link Protocol. Blue Book. Issue 1. October 2018.
This CCSDS Recommended Standard specifies the Unified Space Data Link Protocol (USLP) for use by space missions over space-to-ground, ground-to-space, or space-to-space communications links.
Proceedings of the CCSDS RF and Modulation Subpanel 1E Meeting at the German Space Operations Centre September 20-24, 1993 . Yellow Book - Reports and Records. Issue 1. October 1993.
This Record is a collection of papers presented to the CCSDS RF and Modulation Subpanel Meeting in September 1993. The original printed volume has been scanned in order to make it available for on-lineviewing and downloading. Optical Character Recognition (OCR) has been applied to the file in order to make it searchable; however, OCR errors are to be expected, and only the scanned page images can be considered to represent original document content with fidelity.
Proceedings of the CCSDS RF and Modulation Subpanel 1E on Bandwidth-Efficient Modulations. Yellow Book - Reports and Records. Issue 2. June 2001.
This Report consists of comparative and technical studies prepared for CCSDS Subpanel 1E concerning bandwidth-efficient modulations. These studies were conducted to evaluate existing and new technologies in an effort to improve RF communication channel efficiencies.

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