[SLS-CC] Prox-1 C&S (211.1-B) mention of Type 4 directives ?

[Nicola Maturo]

Hi Greg,

My understanding was that while we included the Lunar Pathfinder Directives as Type 4, to make sure to not leave them out of our standard, Type 5 is what we really want people to use. In this sense, we did not mention Type 4 as a way to "promote" adoption of Type 5.

If you thin it is better to mention Type 4 for completeness, we can do the modification during the Agency Review, and as you suggested we should put a note to clarify that Type 4 were for the Lunar First Adopter and that for the future missions we encourage people to go for type 5.

Regards,

Nicola

ESA - European Space Agency

Nicola Maturo
TT&C and PDT Communications System Engineer
TEC-SET, D/TEC

ESTEC
Keplerlaan 1, PO Box 299
NL-2200 AG Noordwijk, The Netherlands
nicola.maturo at esa.int<mailto:nicola.maturo at esa.int> | www.esa.int<http://www.esa.int/>
T +31 06 41344089


[Image]

From: KAZZ, GREG J. (MSFC-HP27)[MOSSI2] <greg.j.kazz at nasa.gov>
Sent: 07 April 2026 19:51
To: Nicola Maturo <Nicola.Maturo at esa.int>; Andrea Modenini <Andrea.Modenini at esa.int>; sls-cc at mailman.ccsds.org
Cc: Matt Cosby <matt.cosby at goonhilly.org>
Subject: Prox-1 C&S (211.1-B) mention of Type 4 directives ?

Hi Andrea and Nicola,

I noticed there is no mention of the Type 4 directives in 211.1-B (Prox-1 C&S book), only Type 1 or Type 5.
My concern is CCSDS has defined Type 4 to be used as the  "first generation Lunar" applications. What if someone in the future besides Lunar Pathfinder chooses to use this SPDU Type ? We don't preclude it. Therefore,  shouldn't Type 4 be mentioned in the 211.1 document wherever Type 5 is also mentioned ? And mentioned in such a way that emphasizes Type 5 is the preferred approach for interoperability and future use.

Regards,
Greg


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