[CESG] CESG-P-2021-05-001 Approval to publish CCSDS 230.1-G-3, TC Synchronization and Channel Coding—Summary of Concept and Rationale (Green Book, Issue 3)

[CCSDS Secretariat]

Dear CESG Members,

Conditions for approval of CCSDS 230.1-G-3, TC 
Synchronization and Channel Coding—Summary of 
Concept and Rationale (Green Book, Issue 3) have 
been disposed to the satisfaction of the AD(s) 
who voted to approve with conditions. The 
Secretariat will now proceed with CMC polling to authorize publication.
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From:	Shames, Peter M (US 312B) <peter.m.shames at jpl.nasa.gov>
Sent:	Thursday, September 09, 2021 1:59 PM
To:	Thomas Gannett
Cc:	Andrews, Kenneth S (US 332B); Andrea.Modenini at esa.int; 
Ignacio.Aguilar.Sanchez at esa.int
Subject:	Re: [EXTERNAL] FW: [SLS-CC] CCSDS 230.1-G-2.1 - Green Book TC - 
approved with comments - please check deadline

Categories:	Poll Condition Closure

I have reviewed these edits and approve them.

Thanks, Peter


From: Tom Gannett <thomas.gannett at tgannett.net> 
Date: Friday, September 3, 2021 at 8:18 AM 
To: Peter Shames <peter.m.shames at jpl.nasa.gov> 
Cc: Kenneth Andrews <kenneth.s.andrews at jpl.nasa.gov>, "Andrea.Modenini at esa.int" 
<Andrea.Modenini at esa.int>, "Ignacio.Aguilar.Sanchez at esa.int" 
<Ignacio.Aguilar.Sanchez at esa.int> 
Subject: [EXTERNAL] FW: [SLS-CC] CCSDS 230.1-G-2.1 - Green Book TC - approved with 
comments - please check deadline

Peter:

The attached version of CCSDS 230.1-G-2.1, TC Synchronization and Channel Coding—Summary of 
Concept and Rationale (Draft Green Book, Issue 2.1) has been modified in response to your conditions 
for approval re: CESG-P-2021-05-001 Approval to publish CCSDS 230.1-G-3, TC Synchronization and 
Channel Coding—Summary of Concept and Rationale (Green Book, Issue 3).

Please indicate via return email whether the current version satisfies you conditions for approval.

(If it does not, please confer with Ken on what else needs to be done, but CC me on all related 
correspondence.)

Tom


Logothete, L.L.C.
thomas.gannett at tgannett.net
+1 443 472 0805

From: Andrea.Modenini at esa.int [mailto:Andrea.Modenini at esa.int]  
Sent: Friday, September 03, 2021 2:51 AM 
To: Andrews, Kenneth S (US 332B) 
Cc: Ignacio.Aguilar.Sanchez at esa.int; Space Link Coding & Synchronization Working Group; Tom Gannett 
Subject: Re: [SLS-CC] CCSDS 230.1-G-2.1 - Green Book TC - approved with comments - please check 
deadline

Dear Ken,  
 thanks a lot for the good work. I believe as well that this completes our action and the GB is 
ready for publication.  
 
I kindly ask Ignacio to raise a resolution for publication of 230.1-G-2.1 as in attachment, and put 
in CC Tom for information.  
 
Thanks everybody,  
Andrea  
   
 
 
ESA - European Space Agency  
Ph.D. Andrea Modenini 
Communication Systems & Technologies Engineer  
TT&C and PDT Systems & Techniques Section (TEC-EST) 
RF Systems Division 
ESTEC 
Keplerlaan 1, PO Box 299 
NL-2200 AG Noordwijk, The Netherlands 
andrea.modenini at esa.int | www.esa.int 
T +31 71 56 53439, M +31 6 484 56 527  
 
 
 
From:        "Andrews, Kenneth S (US 332B)" <kenneth.s.andrews at jpl.nasa.gov>  
To:        "Andrea Modenini (external)" <Andrea.Modenini at esa.int>  
Cc:        "Space Link Coding & Synchronization Working Group" <sls-cc at mailman.ccsds.org>, 
"Ignacio.Aguilar.Sanchez at esa.int" <Ignacio.Aguilar.Sanchez at esa.int>  
Date:        03-09-21 06:52  
Subject:        Re: [SLS-CC] CCSDS 230.1-G-2.1 - Green Book TC - approved with comments - please check deadline 
 
 
 
 
Andrea,  
 
Finally, an updated version of the TC Green Book is attached, in both .docx and .pdf formats 
(showing change tracking).  The only change from the prior version, dated July 8, is that I 
reverted the modifications that were intended to address point 2.  This means that Section 10.1 
now reads the same as it did prior to the CESG poll, and I deleted references [8] and [9] again 
(which were cited in Section 10.1 as references for CFDP and LTP).  As for change tracking, I 
took the time to accept each change that was caused by Microsoft’s automatic renumbering.  The 
result (I hope) is that the change tracking now shows all human-made edits since the CESG poll, 
in a readable way.  
 
I believe this completes our action with respect to the “Approve with Conditions” result from the 
CESG poll for publication, and these changes can now go back to Tom Gannett for one more 
update.  After that, I don’t know if the CCSDS procedure is to get Peter Shames’s concurrence 
(as the CESG member who imposed these conditions), or to repeat the full CESG poll, or 
whether it can now proceed to the CMC poll for publication.  
 
-Ken  
 
 
 
On Aug 19, 2021, at 6:46 AM, Andrea Modenini (external) <Andrea.Modenini at esa.int> wrote:  
 
Dear Ken,  
following the comments we received, I believe we had WG consensus. All points are accepted, except 2).  
 
If you could please provide us an updated draft accordingly and then we can ask for a SLS AD resolution.  
I guess it is sufficient to reject the edit in Section 10.1, but please let me know.  
 
 
Thanks in advance,  
Kind Regards  
 
 
HE Space Operations for ESA - European Space Agency  
Ph.D. Andrea Modenini 
Communication Systems & Technologies Engineer  
TT&C and PDT Systems & Techniques Section (TEC-EST) 
RF Systems Division 
ESTEC 
Keplerlaan 1, PO Box 299 
NL-2200 AG Noordwijk, The Netherlands 
andrea.modenini at esa.int | www.esa.int 
T +31 71 56 53439, M +31 6 484 56 527  
 
 
 
From:        Andrea Modenini/estec/ESA  
To:        "Space Link Coding & Synchronization Working Group" <sls-cc at mailman.ccsds.org>  
Date:        28-07-21 16:01  
Subject:        [SLS-CC] CCSDS 230.1-G-2.1 - Green Book TC - approved with comments - please check deadline 
 
 
 
Dear colleagues,  
with reference to the Green Book of the TC, at CESG pool, we got an approval with conditions from SEA 
AD, with the feedback below.  
Following discussion with the SLS AD and DAD, it was decided to re-iterate such conditions at WG level.  
 
Kindly, Ken already took action to provide a draft of the TC Green Book implementing such edits (see 
attachment).  
 
I myself reviewed the comments:  
-Point 3, 4, and 5, look normal editorials.  
-point 1) is about including USLP. This appear in line with the Blue Book review that we had recently  
-point 2) implies instead the introduction of CFDP and LTP for TC. Personally I am not aware that we had 
any discussion/input in the WG for allowing the use of such protocols for TC, nor I see any content in the 
BlueBook.  
If this is the case, my personal opinion would be to discard this last point.  
 
 
Starting from this, could you please assess my conclusions and let me know any disagreement no later 
than 13rd August EOB?  
 
In case deadline does not fit because of planned vacation, please also let me know that I will consider 
an extension.  
 
Kind Regards  
 
 
 
 
---- 
It's great that this doc is now being updated, given all of the changes in the C&S WG and other SLS 
standards.  I identify the following Issues:
1) There is no mention of USLP, expecially in the variable length frame mode.  Only TC is included.  This 
must be fixed.  Too many sections to list.
2) In sec 10.3.3.1 (and 10.3.3.4) the only option described for handling "long wait times" on deep space links 
is the repeat function.  However, equally viable methods are to use CFDP of even LTP to provide automated 
file or link layer reliability.  These should be addressed.
3) The term "CODEWORD", "Codeword", and "codeword" are all used, sometimes in the same 
sentence.  They look different but apparently mean the same thing.  Provide some description of this early in 
the doc to avoid any possible confusion.  Too many sections to list.
4) In Glossary "codeword" is not really defined, just a reference is provided.  Fix this.  Also, both encoding and 
decoding definitions only mention BCH, not LDPC.  Please fix this throughout.
5) There are many new scholarly references, which is fine.  At least one, [27], appears to have no reference 
identified in the body of the text.  Please fix this.
 
 
 
HE Space Operations for ESA - European Space Agency  
Ph.D. Andrea Modenini 
Communication Systems & Technologies Engineer  
TT&C and PDT Systems & Techniques Section (TEC-EST) 
RF Systems Division 
ESTEC 
Keplerlaan 1, PO Box 299 
NL-2200 AG Noordwijk, The Netherlands 
andrea.modenini at esa.int | www.esa.int 
T +31 71 56 53439, M +31 6 484 56 527  
 
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