Project Title

Proximity-1 extension



Document Number



5.02 Space Link Coding and Synchronization Working Group

Document Type


Description of Document

The blue book, with respect the current issue will include high rate coding (greater than 0.5) to further conserve the bandwidth. This update is done in parallel to the update of 211.0-B and 211.2-B blue books, that will be done by SLS-SLP and SLS-RFM for including the followings: - S-Band 2025-2110 MHz and 2200-2290 MHz for covering forward (orbit-to-surface) and return (surface-to-orbit) Lunar allocations, possibly extended as 2025-2120 MHz and 2200-2300 MHz for covering also Martian (orbit-to-surface, surface-to-orbit, orbit-to-orbit) allocations; - Possibly other frequency ranges in K-Band (22/27 GHz) for covering other allocations in the Lunar and Martian regions; - Bit rates higher than 2048 kbps; - Spectrally-efficient waveforms to conserve bandwidth, - High rate coding (greater than 0.5), to further conserve bandwidth; - Use Version 4 transfer frame format for added flexibility; - Space Link Protocol adaptations for the new features (e.g., the SET PL EXTENSION).

Applicable Patents

There are no patent issues for this technology that are known by the CCSDS community

Patent Comments

No patents are known to apply to this Recommended Standard. Information concerning patent rights and licensing for LDPC coding is contained in annex B of 131.0-B.

Survey of Similar Standards
Documents or Projects
Undertaken in Other Bodies
and elsewhere in CCSDS

not applicable, since update of existing Blue Book


Book Editor


Book Editor Resources

3 mm

Prototype 1


Prototype 1 Resources

6 mm

Prototype 2


Prototype 2 Resources

6 mm

Prototype 3

Prototype 3 Resources



Monitor Only


Resource Comments

this project shall be done in liaison with projects under SLP and RFM charters for extending Proximity-1 in 211.0-B and 211.1.-B


Legend for Schedule Milestones
Orange Bullet = Required for Orange Books
Green Bullet = Required for Green Books
Magenta Bullet = Required for Magenta Books
Blue Bullet = Required for Blue Books
Note - Red Books are Draft Blue/Magenta Books

Schedule Milestones
Orange BookGreen BookMagenta BookBlue Book
Original Completion Date
(Date in M/D/YYYY format.)
(Date in M/D/YYYY format.)
Project ApprovedOrange BulletGreen BulletMagenta BulletBlue Bullet12/15/2022
Project Start DateOrange BulletGreen BulletMagenta BulletBlue Bullet12/15/2022
Internal WG Review
First Draft Circulated to WGOrange BulletGreen BulletMagenta BulletBlue Bullet4/1/2023
First Draft Comments DueOrange BulletGreen BulletMagenta BulletBlue Bullet5/1/2023
Second draft circulated to WGOrange BulletGreen BulletMagenta BulletBlue Bullet9/1/2023
Second Draft Comments DueOrange BulletGreen BulletMagenta BulletBlue Bullet10/1/2023
Final WB Submitted to AD for Further ProcessingOrange BulletGreen BulletMagenta BulletBlue Bullet11/1/2023
External Milestones
Secretariat Document ProcessingOrange BulletGreen BulletMagenta BulletBlue Bullet3/1/2024
First Agency ReviewMagenta BulletBlue Bullet4/1/2024
RID ResolutionMagenta BulletBlue Bullet5/1/2024
Secretariat Document Processing 2Magenta BulletBlue Bulletnot expected
Final Agency ReviewMagenta BulletBlue Bulletnot expected
RID ResolutionMagenta BulletBlue Bulletnot expected
First Prototype DevelopmentBlue Bullet5/1/2024
Second Prototype DevelopmentBlue Bullet11/1/2024
CMC ApprovalOrange BulletGreen BulletMagenta BulletBlue Bullet12/1/2024
Total Time to Complete
(in months)
Version: 111.0
Created at 10/29/2022 1:05 PM by Andrea Modenini
Last modified at 5/3/2024 12:14 PM by Andrea Modenini