Frequently Asked Questions

▽ Collaborative Work Environment (CWE) FAQs

► Who should register for a CWE account?
Active members of a CCSDS Working Group, Area Directors, and Management Council Members should all have CWE Logins. Individuals who wish to attend CCSDS Meetings are also required to have CWE Logins.

► How to register for a CWE account?
To request a CWE account, you must complete the request form by Clicking Here. Once you have completed and submitted the form, the CCSDS Secretariat will review the submission and obtain approval from the proper CCSDS Area Director and Working Group Chairs. This process may take up to 5 business days.

► What type of access does my CWE login provide?
A CWE login allows read only access to a CCSDS Working Group’s Private space where unpublished and draft publications are developed. Working Group members also have access to the private space of the Working Group’s parent Area. A CWE login also allows registration for all CCSDS Technical Meetings.

► How long is a password valid?
CCSDS CWE users must change their passwords every 60 days. Users receive automated email reminders 14, 7, and 1 day(s) prior to this deadline.

► What is the password complexity guidance?
• The password must be at least 12 characters
• The password must contain at least 3 of the following:
  - Uppercase character
  - Lowercase character
  - Numeric (0-9) character
  - Special character (eg. $,#,@)
• The password must not contain your username.
• Used passwords are recorded. The password must not have been used within the past 24 times.

► How do I change my CWE password?
You may change your password at any time using our self-service password tools. The links to these tools are found on the top bar of every page in the CWE under the Password Management section or by Clicking Here.

► What happens if I forgot my CWE password or it has expired?
If you forgot your password or your password has expired, you may obtain a new password using our self-service password tools. The link to these tools is found on the top bar of every page in the CWE under the "Password Management" section or by Clicking Here.

► Why does CCSDS have password requirements?
The CCSDS Secretariat (and all contracts implementing IT systems on the behalf of the US Federal Government) follows NASA IT Security policy and US Federal Regulations as prescribed by the National Institute of Standards and Technology (Specifically Special Publication 800-53.

► How are Mailman mailing lists subscriptions and CWE accounts different?
It is possible to be a member of a CCSDS Working Group Mailing List, but not have a CCSDS CWE Login. It is also possible to have a CCSDS CWE Login without a subscription to a CCSDS Working Group Mailing List. The CCSDS Secretariat will subscribe approved CWE users to Working Group Mailing Lists based on users’ CWE login requests. Working Group Chairs are the administrators of their Working Group’s Mailing Lists, and Mailing Lists subscriptions as required.

► Who should I contact if I require technical support?
If you still require technical support, please contact CCSDS Tech Support at

▽ CCSDS Publications/Recommendations FAQs

► What are the benefits of using CCSDS Recommendations?
The implementation of CCSDS Recommendations provides the following benefits:
  • Promotes Understanding of Exchanged Data
  • Reduces Nonrecurring Costs
    • Fewer Project-Unique Developments
    • Shorter System Test Periods
    • Less Training or Retraining of Personnel
  • Reduces Recurring Costs
    • More Commercial Off-the-Shelf Hardware
    • Fewer Facilities Because of Load Leveling
    • Only Selected System Redundancy
    • More Automation
  • Reduces Mission Risk
    • Technology is Vetted and Tried by Multiple Agencies
    • Better Chance of Short-Notice Emergency Support from Other Agencies
  • Enables Ingest and Access to Long-Term Data Archives

► Where are CCSDS published documents located?
All approved CCSDS Published Documents and Standards can be downloaded for free on the website in the Publications section or by Clicking Here.

► How do I obtain unpublished or draft documents?
Unpublished or Draft Documents are not readily available. You should contact the Working Group Chair of the book in question. A list of the Working Group chairs can be obtained by Clicking Here. If you are not are not sure of which Working Group chair to contact, then you may contact the CCSDS Secretariat at

► What do the Publication Colors signify?
For an explanation of the colors associated with CCSDS Publications, please refer to section 6 of the Organization and Processes Manual of CCSDS. For a summary, Click Here.

▽ CCSDS Meetings FAQs

► Where is current CCSDS Meeting information located?
All CCSDS Meeting information is located on the website in the Meeting section or by Clicking Here.

► Who can attend the technical meetings and discussion forums?
CCSDS Members, Observers, Liaisons and Associates, are invited to attend CCSDS Technical Meetings. Note that Working Group (WG) Chairs generally manage WG membership. Participants must register (at no cost) to attend meetings. Registration is subject to approval by CCSDS management. The sponsoring agency’s CMC delegate reviews attendees’ registration. Registration approval may be declined with justification.
CCSDS Management Council (CMC) Meetings are limited to CMC delegates and their staff. Observers can attend portions of the management meetings, if requested through the Secretariat and approved by the CMC members.
Each Member Agency is expected to provide, regular support from technical experts to several technical working groups.
Observer Agencies are encouraged, but not required, to contribute resources to Technical Areas or Working Groups. Individuals from the Observer Agencies are invited to participate as technical experts.
Participation by Liaison organizations in meetings is encouraged. This participation will facilitate coordination among organizations as well as promote the exchange of ideas, thereby improving the quality and acceptance of CCSDS products by the user community.

► Whom do I contact for meeting information or changes to a meeting schedule?
Contact the CCSDS Secretariat at

▽ Membership/Participation FAQs

► How do I become a member of CCSDS?
CCSDS Participants are classified in one of four categories: Member Agency, Observer Agency, Liaison, or Associate. Any organization wishing to participate in CCSDS should petition the CCSDS Secretariat in writing requesting permission to participate in one of the four categories. In the case of an application for Member Agency, Observer Agency, or Liaison status, the CCSDS Secretariat will present each request to the CMC (CCSDS Management Council) for consideration and approval. Following the CMC decision, the Secretariat will notify the applicant of the result.
Private companies or institutions should complete an Associate application form. In the case of a request for CCSDS Associate status, the organization is approved once the application has been
  • completed by the applicant;
  • approved by the Principal Delegate of the sponsoring Member or Observer Agency;
  • and signed by the CCSDS Secretariat.

► What rules or requirements does CCSDS have for working group participation?
For details, refer to our Organization and Processes Manual of CCSDS procedures. Some highlights are:
  • We are a consensus organization. Decisions and directions are developed by consensus within the technical and management teams.
  • We have a CCSDS Code of Conduct to promote professional behavior by our participants. This code is available in ANNEX F of our Organization and Processes Manual.
  • We have a patent policy for technology introduced in the standards process. This policy is available in section 2.4.1 of our Organization and Processes Manual.

► Can private companies and institutions participate in CCSDS?
CCSDS recognizes the need for closer ties between private companies/institutions and international space agencies. The CCSDS Associate category allows companies and institutions to participate in the development of CCSDS Recommendations in an attempt to promote a symbiotic relationship that benefits both the private sector and space agencies. Private companies and institutions have developed many CCSDS-compliant, mission-support products, ranging from spacecraft platforms and space-qualified hardware components to ground support hardware and software. Click Here for details.
CCSDS Associate status is obtained by completing the Application Form for CCSDS Associate and obtaining an endorsement from a CCSDS member agency.
Sponsoring CCSDS agencies are responsible for notifying associates whenever new or revised CCSDS Recommendations are posted for review. Associates are encouraged to submit comments about and suggest changes to CCSDS Draft Recommendations. Associate review comments are considered in formulating the formal agency positions on the review document.
There is no charge to CCSDS Associates for their participation.

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