Project Title

Augmenting Proximity-1 Directive Set for Lunar Operations



Document Number



5.04 Space Link Protocols Working Group

Document Type


Description of Document

Purpose – For Lunar, the CCSDS plans on defining Prox-1 directives for S-band and K-band. Lunar operations plans to add the rate 2/3 LDPC k=4096 code and OQPSK and GMSK modulations. Principles to adhere to for this change: 1. Make the directive set useable for more than just S-band (Lunar) i.e., make it multi-frequency compatible, and backward compatible with the original UHF directives in Prox-1 i.e., they will not be deleted but remain available. 2. Use Tables for frequencies and data rates (allows missions more flexibility) 3. Define a channel number index into the frequency tables … same for data rate tables 4. Front load the directive type as bit 0 instead of the last bit in the directive. (Note: we were forced to do it the wrong way by CE Mars 98 design) 5. Use one directive for SET TRANSMITTER PARAMETERS, SET RECEIVER PARAMETERS like Electra does (SET PL_EXT) but rename it: SET TRANSCEIVER PARAMETERS. 6. Replace SET PL_Extensions directive with the more generic Type 8 SPDU for Experimental Extensions for the use case where an agency has experimental orange book parameters that they would like to experiment with before they perhaps are standardized.

Applicable Patents

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

Patent Comments


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

This work is a follow on to the original directive set in Proximity-1 in use at Mars.


Book Editor


Book Editor Resources

0.1 FTE

Prototype 1


Prototype 1 Resources

0.2 FTE

Prototype 2


Prototype 2 Resources

0.2 FTE

Prototype 3

Not Required

Prototype 3 Resources



Monitor Only


Resource Comments



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 Bullet2/13/2023
Project Start DateOrange BulletGreen BulletMagenta BulletBlue Bullet2/20/2023
Internal WG Review
First Draft Circulated to WGOrange BulletGreen BulletMagenta BulletBlue Bullet2/27/2023
First Draft Comments DueOrange BulletGreen BulletMagenta BulletBlue Bullet3/27/2023
Second draft circulated to WGOrange BulletGreen BulletMagenta BulletBlue Bullet4/17/2023
Second Draft Comments DueOrange BulletGreen BulletMagenta BulletBlue Bullet5/1/2023
Final WB Submitted to AD for Further ProcessingOrange BulletGreen BulletMagenta BulletBlue Bullet7/31/2023
External Milestones
Secretariat Document ProcessingOrange BulletGreen BulletMagenta BulletBlue Bullet8/28/2023
First Agency ReviewMagenta BulletBlue Bullet10/2/2023
RID ResolutionMagenta BulletBlue Bullet10/30/2023
Secretariat Document Processing 2Magenta BulletBlue Bullet12/4/2023
Final Agency ReviewMagenta BulletBlue Bullet1/22/2024
RID ResolutionMagenta BulletBlue Bullet2/19/2024
First Prototype DevelopmentBlue Bullet6/10/2024
Second Prototype DevelopmentBlue Bullet7/1/2024
CMC ApprovalOrange BulletGreen BulletMagenta BulletBlue Bullet11/11/2024
Total Time to Complete
(in months)
Version: 72.0
Created at 1/30/2023 1:41 PM by Greg Kazz
Last modified at 11/1/2023 1:55 PM by Greg Kazz