Delta-DOR SIG Minutes of the meeting

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Delta-DOR SIGMinutes of the meeting

• Heppenheim, Germany
• October 2nd, 2007
• Roberto Maddè ESA/ESOC
• Roberto.Maddè_at_esa.int

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List of participants

• Roberto Maddè, ESA/ESOC, chair
• James Border, NASA/JPL, member
• Hiroshi Takeuchi, Jaxa/ISAS, member
• Mattia Mercolino, ESA/ESOC, member

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Adoption of the agenda

1. Introduction of the DDOR SIG
2. Presentation of the SIG with plans, roles,
   responsibilities and milestones, to make it a WG
3. Open discussion
4. Presentation of JPL Considerations on DOR tone
   frequency and structure
5. Presentation of JAXA on ongoing activities for
   cross-cooperation
6. Presentation of ESA on ongoing activities for
   cross-cooperation
7. Open discussion

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1.1 Support to the proposed Working Group

• ESA stated that such support is granted.
• NASA/JPL stated that the support is in principle
  granted and will confirm what the necessary steps
  to get the formal approval are (if any), by
  Oct.19th
• Jaxa stated that the support is in principle
  granted and will confirm what the necessary steps
  to get the formal approval are (if any), by Oct.
  19th.

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1.2 Adoption of a charter

• The charter recently distributed has been
  discussed
• Few changes have been implemented
• The SIG considers that the current version is
  suitable for discussion and/or approval for the
  CESG and CMC.

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2.1 Definition of roles and responsibilities (1)

• ESA will be the Editor of the 2 foreseen books
• Table of contents for the Magenta Book
• General introduction
• Introductory chapter, derived from current ch. 2
  of the WB (MM)
• End-to-end description, based on current ch. 3 of
  the WB (MM)
• Interfaces description and references to
  existing/to be updated Blue Books (RM)
• Configuration of the Delta-DOR measurement (MM)
• Station and spacecraft parameters
• Orbit ephemeris parameters
• Scheduling
• Data transfer procedures
• Correlation process parameters
• Operational validation aspects
• Interagency data exchange procedures (JB)
• Interoperability validation process (JB-MM-HT)
• Quasar catalogue implementation, validation and
  maintenance (HT-JB)

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2.2 Definition of roles and responsibilities (2)

• Draft table of contents of the Green Book
• Overview of the process
• Theoretical background
• System rationale and trade-offs
• Description of existing systems
• Achievable performance
• Delta-DOR related techniques
• Phase referencing
• Same Beam Interferometry
• The table of contents will be finalised in the
  Fall 2008 Meeting
• Roles and responsibilities will be defined in the
  Fall 2008 Meeting

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2. 3 Agreed milestones
Date Milestone
October 2007 WG kick-off (if approved)
April 2008 Draft Delta-DOR recommended practice for cross support Magenta Book for the CCSDS 2008 Spring meeting
August 2008 Revised draft Delta-DOR recommended practice for cross support Magenta Book for Agency review
Fall 2008 Second issue of Delta-DOR recommended practice for cross support after Agency review for CCSDS 2008 Fall Meeting Discussion on Delta-DOR technical characteristics and performance Green Book and work distribution
December 2008 Finalised review and issue Delta-DOR recommended practice for cross support Magenta Book
April 2009 Draft Delta-DOR technical characteristics and performance Green Book for CCSDS 2009 Spring meeting
July 2009 Revised draft Delta-DOR technical characteristics and performance Green Book
Fall 2009 Finalised review and issue Delta-DOR technical characteristics and performance Green Book for CCSDS 2009 Fall meeting
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4. JPL presentation conclusions (1)
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4. JPL presentation conclusions (2)

• It was agreed that the material presented by JPL
  needs to be considered carefully in view of
  enhanced performance, to be proposed to future
  missions
• Implication of flexibility on tone position and
  structure (i.e. the possibility of spreading the
  tones) to be
• First discussed within the WG, including feedback
  with transponder, Ground station and spectrum
  management specialists
• Later, discussed with SLS-RNG

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5. Jaxa presentation conclusions

• Jaxa presented their current activities
• Jaxa will be able to provide raw data either in
  K5, Mk5 or VSR format
• Jaxa proposed to introduce the description of
  other techniques in the coming Green Book this
  proposal has been accepted and the draft table of
  contents is already updated.
• Jaxa plans to use VLBI-related techniques on
  current and coming missions

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6. ESA presentation

• ESA presented the status of cross-cooperation
  with JPL and JAXA
• The development of raw data translators is
  acknowledged to be right way to go, to insure
  interoperability, in the short time scale
• The use of a Common Data Format (CDF) for the
  exchange of raw data can be the good solution, in
  the long term
• The approach followed by ESA to validate their
  Delta-DOR interoperability concept with JPL can
  be taken as a guideline for the coming Magenta
  Book (chapter Interoperability Validation
  process)

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Conclusions

• The support of 3 agencies to the proposed WG has
  been assessed (NASA and JAXA have to formally
  state their support)
• The Charter has been discussed and finalised
• The TOC of the proposed Magenta and Green Books
  has been discussed and agreed
• Roles and responsibilities for the Magenta Book
  have been agreed
• The schedule and milestones for the books
  preparation have been agreed
• Suggestions coming from NASA, JAXA and ESA
  presentations have been collected and will be
  inserted in the coming books, as required