Quick comments for PICS: [Sls-slp] Proximity-1 Data Link Specification for final SLP WG review

Wed Sep 4 08:15:39 UTC 2013

Greg,
        Just about DLL-1.
DLL-1 should be removed if it refer to section 3.2.
Making DLL-1 to refer to 3.2.1 (instead of 3.2) makes the second comment 
superseded.

I am not sure I agree about your view of section 5.4 and I would rather 
use "conditional items" also because as far as I see this is the only case 
(i.e. no big burden implied). However we can go Pink with the present form 
(except the corrections you agreed) and discuss the matter in San Antonio 
to generate RIDs (if needed).

One more comment: DLL-60 says "Time Correlation Process (notional)".
The term notional is mentioned only once in the document (i.e. here).
Should its meaning in PICS context be clarified (or alternatively 
deleted)?

Ciao

Gian Paolo

From:
"Kazz, Greg J (313B)" <greg.j.kazz at jpl.nasa.gov>
To:
"Gian.Paolo.Calzolari at esa.int" <Gian.Paolo.Calzolari at esa.int>, 
"sls-slp at mailman.ccsds.org" <sls-slp at mailman.ccsds.org>
Cc:
CCSDS Secretariat <tomg at aiaa.org>
Date:
03/09/2013 22:58
Subject:
Re: Quick comments for PICS: [Sls-slp] Proximity-1 Data Link Specification 
for final SLP WG review
Sent by:
sls-slp-bounces at mailman.ccsds.org

G.P.

Thanks for your comments!

My answers are in **?. ** below.

------------------------------------------------------
Greg Kazz
EEISE Group Supervisor
Systems Engineering Section (Section 313)
Jet Propulsion Laboratory
4800 Oak Grove Drive, Pasadena  CA 91109
MS 301-490
(818) 393-6529 (office)
------------------------------------------------------

From: "Gian.Paolo.Calzolari at esa.int" <Gian.Paolo.Calzolari at esa.int>
Date: Tuesday, September 3, 2013 3:59 AM
To: "Kazz, Greg J (313B)" <greg.j.kazz at jpl.nasa.gov>
Subject: Quick comments for PICS: [Sls-slp] Proximity-1 Data Link 
Specification for final SLP WG review

A few very quick comments. 
Of course there may be more for similar cases.

regards 

Gian Paolo 
----------------------------------------------------

A2.2 PICS 
Should DLL-1 better refer to 3.2.1 instead of 3.2?
** Yes 3.2.1 **

DLL-1 should be removed as individual subsections of 3.2 are addressed and 
moreover DLL-1 as it stands now is incorrect/confusing as it includes also 
options?
** We need users to comply with both 3.2.1 and 3.2.2. The subparts of 
3.2.2. are useful to see because they contain valid values associated with 
these parameters. **

Why the description of Option 1 is with lower case o (i.e. o.1 instead of 
O.1 as in the table)? ** I think it was a typo. It was corrected as all 
capital letters in my version **
Why DLL-61 is in bold?   (this is not the only one in bold...) ** I think 
this is Tom's way of showing a heading. **

Is it correct to mark all the items within e.g. 5.4 as optional? ** Yes 
that was deliberately done by the WG **
If you read section 5.4, it contains mandatory requirements and options.
This was actually a case for conditional items as follows:
- DLL-63 / 5.4.2.1        Optional 
- DLL-64 / 5.4.2.4        Mandatory if DLL-62 Supported
Is it correct giving up about conditional items in PICS? ** In this case, 
yes **

Moreover 
DLL-61 / 5.4 should not be listed as the individual requirements are 
listed
DLL-63 should refer to 5.4.2.1 and not to 5.4.2 ** I agree, DLL-63 refers 
to 5.4.2.1 **
As section 5.4 is written, it is not visible that this feature is optional 
==> should 5.4.1 be made optional? ** yes **

PICS take - as expected - several pages. 
Why not shortening some cases as e.g. DLL-52 / 5.2 ?
In other words why not having only a row for DLL-52 and removing the 8 
following rows?
Alternatively why not indenting the following 8 row and using identifiers 
as DLL-52.x?
** Up to Tom Gannett how best to deal with indexing or showing subsets of 
information within the PICS **
** We could shorten the DLL PICS, however I tried to strike a compromise 
between the shortest PICS Proforma possible vs conveying some redundancy 
that helps the user check through the items by listing the key ones in 
detail. If I hide too much information, people might have the tendency to 
forget about it. Explicitly listing it (but not regurgatating the entire 
text) seemed to be the best compromise **

**Thoughts from other SLP WG members ??? **

From: 
"Kazz, Greg J (313B)" <greg.j.kazz at jpl.nasa.gov>
To: 
"sls-slp at mailman.ccsds.org" <sls-slp at mailman.ccsds.org>
Cc: 
Thomas Gannett <tomg at aiaa.org> 
Date: 
20/08/2013 00:14 
Subject: 
[Sls-slp] Proximity-1 Data Link Specification for final SLP WG review
Sent by: 
sls-slp-bounces at mailman.ccsds.org

Dear SLP WG members, 

Tom Gannett has provided us now with a pre-approval version for the CESG 
of the Proximity-1 Space Data Link Protocol.

Please review the attached documents and send me and Tom any comments you 
have (redlines of the clean version would work, if you have the bandwidth 
to send a 20 Megabyte file !) to me and Tom by Sept. 13.

There are two files in the CWE directory below. One is a red-lined version 
so that you can see the changes made and also a clean version.

http://tinyurl.com/kzjz38z

Best regards, 

Greg 
------------------------------------------------------
Greg Kazz 
EEISE Group Supervisor 
Systems Engineering Section (Section 313)
Jet Propulsion Laboratory 
4800 Oak Grove Drive, Pasadena  CA 91109
MS 301-490 
(818) 393-6529 (office) 
------------------------------------------------------
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