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Welcome to the CCSDS Blog. For an overview of CCSDS, go to www.ccsds.org, and see our “home” page and our “about” page. This Blog will have committee postings about Document releases, meeting registration/logistics announcements, press releases, working group announcements, and other general info that the CCSDS teams and the public may be interested in. If you would like to get notified of new posting, sign up for alerts at the bottom of this page. Note that this page is not regularly monitored or moderated. If you want to report something on this page, or if you want a reply about something on this page from CCSDS, email Secretariat@mailman.ccsds.org.

To see new topics and initiatives in work in CCSDS, click “New Work” above, to go to our New Work Items announcements page.

Feb 26
5 New CCSDS Books Published

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File size 1746 KB
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.
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File size 1538 KB
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.
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File size 310 KB
Delta-Differential One Way Ranging (Delta-DOR) Operations. Magenta Book. Issue 2. February 2018.
This Recommended Practice specifies a set of standard practices and message formats for use in the navigation technique known as Delta Differential One-Way Ranging (Delta-DOR). The current issue adds clarifications, adds a subsection on quantitative validation criteria, renames 'Service Request' to 'Support Request', adds Support Request specifications, adds examples of Support Requests as new annex, deletes section 7 in favor of reference to the Delta-DOR Quasar Catalogue.
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File size 192 KB
Delta-DOR Quasar Catalog Update Procedure. Magenta Book. Issue 1. February 2018.
This Recommended Practice provides specifications for a quasar catalogue to be used in Delta-DOR measurements; description of the catalogue update process; procedures and qualitative criteria to evaluate whether the updates of such catalogues are acceptable; description of the registries to be included in a quasar catalogue; and rules to update SANA entries.
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File size 683 KB
Pointing Request Message. Blue Book. Issue 1. February 2018.
This Recommended Standard defines the Pointing Request Message (PRM), a standardized format that allows space agencies and operators to exchange information about requested (sequences of) changes to the attitude of the spacecraft or to an articulated spacecraft component.


Dec 05
3 New CCSDS Books Released

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File size 628 KB
Voice and Audio Communications . Blue Book. Issue 1. November 2017.
This Recommended Standard specifies the technologies, services, and service interfaces for real-time or near real-time voice and audio communications among terrestrial facilities and space systems in support of the mission operations of space flight. 
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Mission Operations--Message Abstraction Layer . Blue Book. Issue 1. November 2017.
This CCSDS Recommended Standard specifies a binding of the Mission Operations Message Abstraction Layer (MAL) to TCP/IP using a split binary encoding for MAL data types. 
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File size 219 KB
CCSDS Spacecraft Identification Field Code Assignment Control Procedures. Magenta Book. Issue 7. November 2017.
This Recommended Practice defines the procedures governing assignment, relinquishment, and management of CCSDS Spacecraft Identification (SCID) codes. The current update adds frequency band as a qualifier for SCID assignment, names the SCID qualified by version number and frequency band the Qualified SCID (Q-SCID), and replaces the outdated hard-copy request form with instruction to use the online form on the Space Assigned Numbers Authority (SANA) Web site.


Nov 02
1 New CCSDS Blue Book Released
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File size 1929 KB
Radio Frequency and Modulation Systems--Part 1: Earth Stations and Spacecraft. Blue Book. Issue 27. November 2017.
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 draft updates recommendations 2.4.18 and 2.5.6B.


Oct 24
2 new CCSDS Blue Books Released


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Spacecraft Onboard Interface Services--RFID . Blue Book. Issue 1. October 2017.
This Recommended Standard specifies tag-encoding options that augment, yet remain compatible with, a legacy ISS Inventory Management System tag encoding schema established for early flight experiments. 
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Mission Operations Monitor & Control Services . Blue Book. Issue 1. October 2017.
This Recommended Standard defines the Mission Operations Monitor and Control services in conformance with the service framework specified in the Mission Operations Services Concept Green Book (CCSDS 520.0-G-3).


Sep 14
4 New CCSDS Blue Books Published


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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.
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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.
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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 issue adds LCPC coding for a stream of Channel Access Data Units (CADUs).
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File size 384 KB
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.


May 30
5 New CCSDS Books Published


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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.
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File size 10929 KB
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.
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File size 5834 KB
Wireless Network Communications Overview for Space Mission Operations. Green Book. Issue 3. May 2017.
This Informational Report contains background and explanatory material to support the CCSDS wireless network communications Best Practices for networked wireless communications in support of space missions. It examines the possibilities and advantages of the onboard application of wireless communications technology to space missions, describes a set of driving use cases in the space domain, and evaluates the utilization of existing technologies and related terrestrial commercial standards to meet the resulting space-based use case requirements. Also included is relevant tutorial information intended to assist the reader in understanding basic concepts of wireless transmission and networking along with possible issues related to the deployment of wireless networks.
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Cross Support Transfer Service--Specification Framework. Blue Book. Issue 1. April 2017.
This Recommended Standard defines the various logical components required for specifying Cross Support Transfer Services.
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Cross Support Transfer Services--Monitored Data Service. Blue Book. Issue 1. April 2017.
This Recommended Standard defines the Monitored Data Cross Support Transfer Service (CSTS), which allows a spaceflight mission to receive cyclic reports on, and to query the current values of, the parameters that are pertinent to cross support services being provided by a Cross Support Complex. The Monitored Data service also allows a spaceflight mission to receive notifications of the occurrence of events of interest associated with the services that are being provided by a Cross Support Complex.


Jun 01
3 New CCSDS Yellow Books Released

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File size: 197,336 Bytes

Released: 6/1/2016

Procedures for SANA Registry Specification. Yellow Book. Issue 1. May 2016.
This document defines procedures for CCSDS Working Group (WG) interactions with the CCSDS Space Assigned Numbers Authority (SANA) for the purpose of creating and modifying SANA registries.  
Icon CCSDS 313.1-Y-1      
File size: 451,302 Bytes

Released: 6/1/2016

CCSDS SANA Registry Management Policy. Yellow Book. Issue 1. May 2016.
This document describes the CCSDS Space Assigned Numbers Authority (SANA) Registry Management Policy and related procedures.  
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File size: 223,137 Bytes

Released: 6/1/2016

Space Assigned Numbers Authority (SANA)--Role, Responsibilities, Policies, and Procedures. Yellow Book. Issue 2. May 2016.
This CCSDS Record defines the Space Assigned Numbers Authority (SANA), its role, responsibilities, policies, and procedures within the Consultative Committee for Space Data Systems (CCSDS). ​
Feb 24
​Spring 2016 TECHNICAL PLENARY MEETING

Hosted by NASA/Glenn Research Center, the CCSDS spring 2016 meeting series will be held at the Westin Cleveland Downtown in Cleveland, Ohio.  The main technical meeting series will be held 4-8 April 2016 and will be followed by the CESG Meeting which will be held on Monday, 11 April 2016.

For details and to register, visit http://cwe.ccsds.org/fm/ProfileSDL/myProfile.aspx.

Maps, hotel and other information are available at http://public.ccsds.org/meetings/2016Spring/default.aspx  

IMPORTANT: Please note the following instructions and process:

1) All Users must have a CWE login. If not, then you must request one here:  http://cwe.ccsds.org/ReqLogin.aspx.  Several of the links in this e-mail will prompt you for your CWE Login.

2) All Users must have a profile in order to even SEE/VIEW the "Register for the Spring 2016 Meetings" button.  If you have not created a profile but have a CWE login, then you will be notified that you cannot register until you have filled out your profile.

3) After your meeting registration is submitted you will receive a confirmation e-mail, like in previous registrations, and you will also receive a URL which allows you to edit your registration.

As always, registration to attend is required, but there are no fees.  Registration will close on Monday, 28 March 2016, one week before the start of the technical meetings.

All attendees that require a Letter of Invitation for visa purposes should already have their letter. However, if you do not have a letter, please contact the Secretariat(Secretariat@mailman.ccsds.org) immediately so it can be arranged.  

Also, as always, dress for the Technical Plenary meeting is Business Casual.​

Jan 07
Pointing Request Message - Released for Agency Review

Document # Document Name Type   Date   Issue   Comments  
Due By
Click Here to Review  CCSDS 509.0-R-1 Pointing Request Message Red Book 1/7/2016 1 3/15/2016

Dec 31
3 New CCSDS Green Books Released


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File size: 229,700 Bytes

Released: 12/31/2015

Navigation Data Messages Overview. Green Book. Issue 1. December 2015.
This Informational Report contains background and explanatory material to supplement the CCSDS Recommended Standards for spacecraft navigation data. 
Icon CCSDS 350.1-G-2      
File size: 489,386 Bytes

Released: 12/31/2015

Security Threats against Space Missions. Green Book. Issue 2. December 2015.
This CCSDS Informational Report provides an overview of potential threats against various categories of civilian space missions and provides illustrative security threat data for mission planners. 
Icon CCSDS 120.2-G-1      
File size: 2,446,546 Bytes

Released: 12/31/2015

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.
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