[Moims-mp] MP&S WG meeting 22/02/2021 minutes

[Peter.van.der.Plas at esa.int]

Dear all, 

Please find below the minutes of the MP&S WG meeting from yesterday. Let 
me know if I missed something.

Best regards, 

Peter 

-- 

Subject: Mission Planning & Scheduling WG meeting
Date and time: 22 February 2021, 16:00 - 18:00 CET
Location: WebEx 

Attendance list

- Peter van der Plas (ESA, chair)
- Marc Duhaze (CNES, deputy chair)
- Christoph Lenzen (DLR) 
- Dominik Marszk (ESA) 
- Geoffrey Lochmaier (NASA)
- Guillermo Buenadicha (ESA)
- Maria Woerle (DLR)
- Rachel Jenkins (ESA)
- Roger Thompson (ESA)

Agenda 

1. MP&S Blue Book update
2. Planning and next steps
3. CCSDS Spring Meeting
4. AOB

Minutes 

1.  MP&S Blue Book update 

Roger has provided on the GDrive an update of the MP&S Blue Book (draft G) 
and Enterprise Architect model (draft U), including the XML Schemas for 
file based exchange.

Some open points as provided by Roger (email 10/02/2022) were discussed. 
The following was agreed in the WG:

  1.  The WG agreed with option b) A supertype is defined to allow the 
three different Update structures to be supported through polymorphism. An 
additional key shall be provided to the service to allow the subscription 
to one or more update structure types.
  2. The WG agreed with the Position and Direction structure updates. This 
will allow for a simplification of the Constraints and Triggers, but not 
on the Repetitions. It was mentioned that the base classes in Triggers and 
Repetitions shall as such as possible capture common attributes at the 
highest possible level.
  3. The proposal from Roger (annex in the BB) for the representation of 
literals was discussed but not yet conclusive. WG members to further 
review and provide feedback on the issue. To be consolidated in the next 
WG meeting.
  4. It was agreed to represent these enumerated types simply as Strings 
in the Information Model. This has the drawback that e.g. with the XML 
Schemas no type checking will be performed. This can however be added as 
part of the tailoring for a specific mission, where the enumerations can 
be added to the XML Schemas. This mission specific tailoring shall be 
explained in the BB.
  5. Peter showed the first results of a conversion tool that is now able 
to improve the structure of the XML Schemas produced by EA, in particular 
for the List types, where the elements will be encapsulated in an 
additional element level. Christoph mentioned that when using XML Spy, 
this feature would not be needed. However, it was acknowledged that in 
case no tool is available, the XML files would be better readable with the 
improved structure. In addition, the conversion tool can be used to fix 
certain XML Schema features (like patterns) that do not seem to work with 
the EA generator.

In addition, an issue with the PUB-SUB was addressed by SM&C and the 
impact on MP&S was discussed and it was agreed that the simplifications 
proposed by SM&C do not have significant impact for the MP&S Services.

2. Planning and next steps

The MP&S Blue Book is expected to be ready for Agencies Review by the end 
of March. However, CESG has raised its concerns regarding the parallel 
review of both the MAL BB and MP&S BB, as there is a dependency here. The 
decision will ultimately be with MOIM-AD how to proceed with the MP&S BB 
review. From the WG perspective, the MP&S BB should be finalised as far as 
possible, and the current assumptions on the expected MAL updates shall be 
listed.

3. CCSDS Spring Meeting

CCSDS Spring Meeting 2022 will take place in Huntsville, Alabama from 9-13 
May. For the moment, the assumption is that the meetings will take place 
in-person. As such, WG members are invited to make their travel 
arrangements, however with sufficient flexibility, as in the previous two 
years the meetings were changed into teleconferencing only on short 
notice. It shall be ensured that there are adequate teleconferencing/video 
conferencing facilities available in the meeting rooms, such that the 
meetings can be followed remotely by the ones that are not able to travel 
to Huntsville. Could anyone who will be restricted by his organisation to 
travel in-person please let me (Peter) know?

4. AOB 

The next MP&S WG meeting is planned for Tuesday 22 March 2022, 16:00 - 
18:00 CET. Peter to send the meeting invitation. 

Best regards, 

Peter 


ESA - European Space Agency

Peter van der Plas
EGSE and Ground Systems section (TEC-SWG)
Directorate of Technology, Engineering and Quality

ESTEC
Keplerlaan 1, PO Box 299, NL-2200 AG Noordwijk, The Netherlands
Peter.van.der.Plas at esa.int | www.esa.int
Phone +31 71 565 5848 | Fax +31 71 565 5420 | Mobile +31 6 51 93 44 30

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