[CESG] FW: OLSG Report Addendum Recommendations for CCSDS

[Hooke, Adrian J (9000)]

Quite a lot of work to do here, which mostly falls in Gippo's area. Gippo: do you generally agree with the proposed priorities? However, I think that SIS also has a horse in this race (e.g., "the CCSDS should develop standard practices for each scenario (e.g., LEO, GEO, Lunar, L1/L2, deep space) that will enable automatic retransmission" since LTP is a candidate.

///a

From: Edwards, Bernard L. (GSFC-5600)
Sent: Thursday, November 22, 2012 6:50 AM
To: sls-com at mailman.ccsds.org
Subject: [Sls-ocm] OLSG Report Addendum Recommendations for CCSDS

Hi!

This is Bernie Edwards from NASA again.  I just wanted to let you know that the Optical Link Study Group met in Darmstadt, Germany last week and worked on the addendum to the OLSG report sent to the IOAG earlier this year.  Once the report is finalized, I will be able to share it with this group, but in the meantime, I did want to share the recommendations that will be presented to the IOAG at their next meeting at NASA's Kennedy Space Center in early December.  Guidance for a new CCSDS working group can be found in Table 1.3 below.

If you have any questions or concerns about these recommendations, please let me know and I can get them to the group leaders.

Respectfully,
Bernie Edwards

1.1       Action for all Agencies
Recommended Action for All Agencies

Priority

The space agencies should conduct a rigorous detailed study independent of the CCSDS to determine if there are ways of accomplishing beaconless PAT, as this would also facilitate a solution to the eye safety issues.

1


1.2       Actions for the OLSG
Recommended Actions for the OLSG

Priority

The OLSG should continue the dialogue with ICAO, with the goal of accommodating optical space communications within the ICAO laser safety standard.

1

The OLSG should continue the dialog with the NASA JSC Space Medicine Office to discuss the implications of the revised eye safety calculations performed by the OLSG.

1


1.3       Standardization Guidance for the CCSDS
Recommended Standardization Guidance for the CCSDS

Priority

The CCSDS should study the possibility of dual wavelength terminals in the event that a single wavelength is not achievable. A common optical interface should be defined that would allow one agency's back-end equipment to be connected to another agency's optical front-end

1

The CCSDS should standardize the uplink beacons and associated acquisition sequence.

1

The CCSDS should develop two sets of standards for modulation and coding for return links to deal with the low and high photon density domains.

1

The CCSDS should develop standards for combinations of modulation and coding for channel-dependent effects (e.g., those caused by elevation angle and atmospheric conditions). VCM standards should be prepared.

3

The CCSDS should develop standards for combinations of modulation and coding for channel-dependent effects (e.g., those caused by elevation angle and atmospheric conditions). The CCSDS should develop ACM standards.

4

The CCSDS should develop two sets of standards for modulation and coding for forward links to deal with the low and high photon density domains.

2

The CCSDS should conduct a study to confirm that IOAG Service Catalog 1 and IOAG Service Catalog 2 can be used, and recommend an association of the optical physical modulation and coding layers with the existing higher protocol layers. If the existing protocols are considered insufficient, then CCSDS should develop optical communication-specific protocols.

1

The CCSDS should develop data exchange standards for optical communication forecasts and meteorological data from ground sites. The CCSDS should reuse existing standards (e.g., BUFR, GRIB, NETCDF) from the meteorological community when possible.

1

The CCSDS should develop standard practices for each scenario (e.g., LEO, GEO, Lunar, L1/L2, deep space) that will enable automatic retransmission.

2

The CCSDS should review the service management standard and identify areas that must be modified to accommodate optical communications and develop the necessary amendments.

2

The CCSDS should develop best practices for the systems engineering of optical communication links for missions, including practices for meteorological databases, link budget, compatibility testing, and terminology/system decomposition.

2




From: Edwards, Bernard L. (GSFC-5600)
Sent: Thursday, October 04, 2012 11:10 AM
To: sls-com at mailman.ccsds.org<mailto:sls-com at mailman.ccsds.org>
Subject: OLSG Report Submitted to the IOAG in June

Hi Again!
I was told the e-mail list is working, so I wanted to send out some more details.

Attached is the OLSG Report that was submitted to the IOAG in June.  I've also attached the presentation used.

The OLSG is busy updating the report with more analysis done - mostly operational issues such as impact of clouds, airplanes, laser safety, etc.  The OLSG is also working hard on recommendations for what parameters should be tackled by CCSDS (e.g. modulation; coding; point, acquisition, and tracking approaches, etc).

I'm going to ask for permission to send out the new outline for the new final report from the OLSG co-chairmen and send that along as soon as I can.  If you see any issues with the interim report, please let me know or another person on the OLSG so that it can hopefully be addressed in the new report being worked.

Cheers,
Bernie

From: Edwards, Bernard L. (GSFC-5600)
Sent: Thursday, October 04, 2012 11:01 AM
To: sls-com at mailman.ccsds.org<mailto:sls-com at mailman.ccsds.org>
Subject: Update on the IOAG Optical Link Study Group

Hello OCM SIG Members!

This is Bernie Edwards from the NASA Goddard Space Flight Center.  I wanted to test that this mailing list is still good and reaches the members of the OCM-SIG.

Assuming this works, as all of you know, there is no OCM-SIG meeting this fall at the CCSDS meeting in the United States.  That was decided back in Darmstadt because we wanted to wait and see what the IOAG's Optical Link Study Group was going to recommend.  The Optical Link Study Group (OLSG) made several recommendations to the IOAG and was supposed to have completed its work, but the IOAG gave it more things to study.  The Study Group is working on new recommendations to be delivered to the IOAG again, and some of those recommendations include things the CCSDS will be asked to work on.  NASA is proposing to use the OCM-SIG to do the work within the CCSDS.  Thus I wanted to test this e-mail list.

I will be sending out more information from a NASA perspective once I confirm that this list is working!

Thanks,
Bernie Edwards

----------------------------------------------------------------------------
Bernard L. Edwards
Chief Communications Systems Engineer
Electrical Engineering Division (Code 560)
NASA Goddard Space Flight Center
(301) 286-8926
E-Mail:  Bernard.L.Edwards at nasa.gov<mailto:Bernard.L.Edwards at nasa.gov>

"Dream - Believe - Dare - Do"


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