[CESG] RASIM Green book question

Shames, Peter M (313B) peter.m.shames at jpl.nasa.gov
Tue Nov 20 14:34:48 EST 2012

Hi Nestor,

I am a little confused by some parts of your request, but will answer as best I can.  The first part is that since it is a Green Book, not Magenta nor Blue, there is little that can be said by way of compliance.  It contains no "shall" statements, it is informational.  At the same time I think it does offer some very useful overall guidance about how to think about the relationships among information, information models, and data storage and access objects such as repositories, registries, and archives.  This is not a "PDS design", but it does reference PDS and a number ofo ther systems in the US and Europe.  If it is deficient on coverage of other European systems that would be due to a lack of adequate participation in the WG, but several different systems are covered.

The concepts, overall, are clearly articulatedbut are not tied to any specific implementation or framework.

The capabilities covered in this document are largely relevant for distributed ground data systems.  It does not specifically address command and control systems.  I suspect that many of the concepts, as presented, are relevant for comand and control systems, but it was not the intent to directly address real-time performance and related considerations.

I do not understand your reference to "its relation with the spacecraft information model (an E-2-E CCSDS info model)".  Just which "E-2-E CCSDS info model" are you making reference to?  I know of no such document by that title (or anything related to that).

I think the answer to your question of "Is it Option 2 or Option 2" (see highlights below), is yes, I think it is Option 2.

I do think that if there are major issues we should identify them now and fix them if within reason.  I do not forsee a "SEA RASIM compliance test" in the future, but do think that if there are good, well stated, and useful current practice concepts we should be considering adopting them where they will be of benefit.

I hope that clarifies things.

Regards, peter

From: Nestor Peccia <Nestor.Peccia at esa.int<mailto:Nestor.Peccia at esa.int>>
Date: Tuesday, November 20, 2012 12:29 AM
To: Peter Shames <peter.m.shames at jpl.nasa.gov<mailto:peter.m.shames at jpl.nasa.gov>>
Cc: Adrian Hooke <Adrian.J.Hooke at jpl.nasa.gov<mailto:Adrian.J.Hooke at jpl.nasa.gov>>, CCSDS Engineering Steering Group - CESG Exec <cesg at mailman.ccsds.org<mailto:cesg at mailman.ccsds.org>>, "cesg-bounces at mailman.ccsds.org<mailto:cesg-bounces at mailman.ccsds.org>" <cesg-bounces at mailman.ccsds.org<mailto:cesg-bounces at mailman.ccsds.org>>
Subject: Re: [CESG] RASIM Green book question

One thing that you need to clarify is its future usage (as already asked by Erik and Adrian)

  1.  Option 1: If SEA will come in the future asking every WG to apply it, we have a problem. Why ? The doc needs probably to be reworked
  2.  Option 2: If SEA asks for considering it as a reference but something not to be compliant with, the issue is simpler.

Option1 is related to the RASSIM and how considers the Command & Control part (a data system with activities, report and events) and its relation with the spacecraft information model (an E-2-E CCSDS info model)

As RASIM was initially based on a PDS design (i.e., its archives, the OAIS model,  its submission / retrieval packages. its query search capabilities, etc.) has some deficiencies vis a vis the above mentioned C&C details.

So, please specify how SEA wants to proceed.

If it is option 2, MOIMS will invest limited resources
If it is option2, MOIMS will invest more resources, but the potential conditions will imply additional resurces from the SEA Area

Please let us know your views


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