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Jean-Luc:<br><br>
Thank you for your comments. I have tried to address your questions
in-line with your message. Please let me know if I should respond
further.<br><br>
Regards, <br>
David<br><br>
<br>
At 08:34 AM 8/23/2005, Jean-Luc.Gerner@esa.int wrote:<br>
<blockquote type=cite class=cite cite="">Navigation WG<br><br>
Dave,<br>
Your paper is very interesting for its technical content and the
exhaustive<br>
review of the technique and issues.<br>
I am missing however reference to the existing Delta-DOR recommendation
CCSDS<br>
401 (2.5.6B) which is addressing the RF domain, was approved blue in 1997
and<br>
reviewed in 2002 (with decision for 'no change'). How do you see
this<br>
recommendation fit into your proposal?</blockquote><br>
The 401 Blue Book is listed as reference [6] in the Concept Paper.
Also, on page 6 of the paper, it is stated that reference [6]<tt>
"already addresses a number of these factors and more, so a separate
DOR tones specification may not be necessary. However, for
interoperability, agencies will at least need to consider these items in
an ICD or memorandum of understanding." I wasn't aware of the
401 document when I started on the Concept Paper, so I am thankful that
its existence was pointed out to me by one of the people I asked to
review it prior to submission. My apologies for not citing the
specific section reference (the 2.5.6B); I should have been more
thorough.<br><br>
</tt><blockquote type=cite class=cite cite="">I believe we should
distinguish what is needed to ensure interoperability and<br>
what is more of the 'information exchange' nature and not prone to<br>
standardisation. Your concept paper seems to address
both.</blockquote><br>
The only purpose of the Concept Paper was to propose that the CCSDS
charter Working Group(s) or BOF(s) to address the interoperability
issues. It is my expectation that whatever group(s) are chartered
to work on the topic will address the issue that you suggest, and
probably several others.<br><br>
<blockquote type=cite class=cite cite="">What CCSDS needs also to address
is the timeline. how much is missing from<br>
what is already available? when is it needed (what missions?)? Then we
will<br>
be able to decide on how best use our resources; should we wait until
current<br>
work is completed or does it require that we give it high priority
and<br>
redirect current resources, putting other work on
hold?</blockquote><br>
I agree that these are excellent questions. However, I think that
most of these questions, as they deal with schedule and resource issues,
would best be addressed by the CESG, which will charter the working
group(s)/BOF(s).<br><br>
<br>
<blockquote type=cite class=cite cite="">Best regards<br>
Jean-Luc Gerner<br>
TEC-ETT<br>
Tel: +31 71 565 4473<br><br>
<br>
<br>
David
Berry
<br>
<david.s.berry@jpl.nasa
To:
tom.gannett@btas.com
<br>
.gov>
cc: belinda.arroyo@jpl.nasa.gov,
wallace.s.tai@jpl.nasa.gov,
<br>
Sent
by:
sls-rng@mailman.ccsds.org, moims-nav@mailman.ccsds.org,
erik.barkley@jpl.nasa.gov, <br>
cesg-all-bounces@mailma
cesg-all@mailman.ccsds.org, Nestor.Peccia@esa.int,
leslie.paal@jpl.nasa.gov
<br>
n.ccsds.org
Subject: [Cesg-all] CCSDS Concept Paper:
delta-DOR
<br>
<br>
<br>
11/08/2005
03:01
<br>
<br>
<br><br>
<br><br>
<br><br>
Tom:<br><br>
I have attached the CCSDS Concept Paper that I mentioned to you I
was<br>
working on, for posting at<br>
<a href="http://public.ccsds.org/publications/ConceptPapers.aspx" eudora="autourl">http://public.ccsds.org/publications/ConceptPapers.aspx</a><br><br>
If there's anything else you need, please let me know.<br><br>
Regards,<br>
David Berry(See attached file: delta-DOR-Concept-Paper.pdf)<br>
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