UC [Sls-slp] Updated Prox-1 Data Link Layer book Now Available

Wed Oct 26 11:02:38 UTC 2011

Enrico,

I will keep this brief so we can discuss it next week and I understand
your issues regarding the ExoMars programme - we have been having the
same issues with programme - which is why the review has been delayed.

We need to be clear between new capabilities and corrections to the
specification. I agree that new capabilities should not be included
under the 5 year review - however all technical corrections &
inconsistencies should be. Saying this I am not sure that NASA / UKSA
are not adding any new features, just identifying errors when they
implementing the protocol (except the ones that have been presented
before). 

The first thing we should do is each Agency should identify what are
their Major / Minor inconsistencies before we embark on the discussion
(as set out in the agenda).  This should speed up the discussion. 

I agree the goal is to come out of the review with 3 clean books,
however I would not be happy to recommend an agency review without
addressing ESA's, NASA's and UKSA comments on the inconsistencies.

Have a safe trip over and I will see you on Sun or Mon.

Matt.

Matthew Cosby
Communications Engineering, Space Manpower
Tel: 01252 396313
email: mcosby at QinetiQ.com
www.QinetiQ.com
QinetiQ - Delivering customer-focused solutions 

Please consider the environment before printing this email. 

________________________________

From: Enrico.Vassallo at esa.int [mailto:Enrico.Vassallo at esa.int] 
Sent: 26 October 2011 11:08
To: Cosby Matthew
Cc: Gian.Paolo.Calzolari at esa.int; Kazz, Greg J (313B);
sls-slp at mailman.ccsds.org
Subject: RE: UC [Sls-slp] Updated Prox-1 Data Link Layer book Now
Available

Matt, 

thanks for your inputs. Note that the deadline for input papers expired
one week ago. Additionally, we have an internal ESA problem since the
EXOMARS team did not deliver any request for changes to us. 
I propose the following way forward: 

1) With priority one we discuss in Boulder the changes necessary to
align the 3 books for a mission starting today so that we eliminate the
many inconsistencies we found. This can be done by looking at the inputs
delivered in time for the meeting. 3 clean and correct books can be
delivered at the end of the meeting. 
2) With a view to integrating comments requesting additional
capabilities (inputs from you and Greg, delivered late), we could
dedicate the time that remains from activity 1and maybe generate a new
set of drafts that should remain in the WG. By the next meeting, we can
work out the internal ESA problems and check that EXOMARS is approved as
we know it today (if the Russians come on board by next January, we may
need to add additional non CCSDS standard modes......) 

Given that the new features in 2 require independent verification as for
CCSDS rules, I would recommend that we go ahead with agency review of
the documents resulting from 1. In two years from now, we may be able to
submit the documents initiated in 2 for an add-on review. There are too
many problems with the current books to delay delivering corrected
versions. One idea would be not to do an agency review but to call this
delivery a corrigendum. In this case, we can have only one agency review
once the new capabilities have been properly added and verified. 

Let's discuss it in Boulder so as to avoid too many emails ..... 

Regards, Enrico 

From: 

"Cosby Matthew" <MCOSBY at qinetiq.com> 

To: 

<sls-slp at mailman.ccsds.org> 

Cc: 

<Gian.Paolo.Calzolari at esa.int>, <Enrico.Vassallo at esa.int>, "Kazz, Greg J
\(313B\)" <greg.j.kazz at jpl.nasa.gov> 

Date: 

26/10/2011 11:41 

Subject: 

RE: UC [Sls-slp] Updated Prox-1 Data Link Layer book Now Available

________________________________

Greg, 

Sorry for the delay... 

I have now added a new document to the CWE ( http://tinyurl.com/3n9qx9r
<http://tinyurl.com/3n9qx9r>  - same link as below) that contains the
comments from UKSA on the P1 Data Link Layer. This has been done from
the ExoMars lander point of view. 

I have also added the document that has the proposed changes to the hail
for Set V(R) - which was presented in Berlin. 

Matt. 

Matthew Cosby
Communications Engineering, Space Manpower
Tel: 01252 396313
email: mcosby at QinetiQ.com
www.QinetiQ.com <http://www.qinetiq.com/> 
QinetiQ - Delivering customer-focused solutions 

Please consider the environment before printing this email. 

________________________________

From: sls-slp-bounces at mailman.ccsds.org
[mailto:sls-slp-bounces at mailman.ccsds.org
<mailto:sls-slp-bounces at mailman.ccsds.org> ] On Behalf Of Kazz, Greg J
(313B)
Sent: 19 October 2011 19:50
To: sls-slp at mailman.ccsds.org
Cc: Gian.Paolo.Calzolari at esa.int; Enrico.Vassallo at esa.int
Subject: [Sls-slp] Updated Prox-1 Data Link Layer book Now Available 

Dear SLS-SLP members, 

Please find a new draft review version of the Prox-1 Data Link Layer
recommendation in: (filename: Prox1 Data Link Oct 14 2011 includes ESA) 

http://tinyurl.com/3n9qx9r <http://tinyurl.com/3n9qx9r>  

There are a few ESA comments that are pending resolution. You can find
these and NASA comments concerning them in the same URL with filename: 
Comments to ESA on DLL Oct 18 

Best regards, 

Greg Kazz 
Chairman SLS-SLP WG 

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