SLS AREA REPORT

1. SLS AREA REPORT SLS-OPT: Optical Communications Working Group (1 of 10)

2. SLS AREA REPORT SLS-OPT: Optical Communications Working Group (2 of 10) • Agenda: • Monday • Review of the First Draft of the Green Book on Real-Time Weather and Atmospheric Data • Tuesday • NASA presentation on a high data rate proposal (e.g. for Near Earth applications) • ESA / DLR presentation on their proposal for high data rate • DLR presentation on ALPHASAT Intersatellite link and Earth downlink • Wednesday • NASA presentation on high photon efficiency proposal (e.g. for Deep Space applications) • JAXA and DLR/IKN made presentations on a Low Complexity On-Off Keying standard • CNES presentations on pointing, acquisition, and tracking and on inputs for future high data rate standards compatible with LEO DTE • Presentations by NASA, NICT, DLR/IKN on recent demonstrations

3. SLS AREA REPORT SLS-OPT: Optical Communications Working Group (3 of 10) • Agenda: • Thursday • HIT presentation on their HY-2 satellite to ground experiments • DLR/IKN provided a status update on OSIRIS • Updated the schedules for the current approved projects in CWE • Discussion on the next monthly telecons • Potential layout of Blue Books • Review of proposed SANA registry for optical communications

4. SLS AREA REPORT SLS-OPT: Optical Communications Working Group (4 of 10) • Summary of Progress: • Reached an agreement that the comments on the first draft of the Green Book on Real-Time Weather and Atmospheric Data are due on 8 January 2015. The team working on the Green Book will then disposition the comments and report on the dispositions at a monthly telecon before releasing the second draft at the Spring 2015 CCSDS Technical Meeting. • Dirk Giggenbach (DLR/IKN) has agreed to be the “leader” in developing the Low Complexity On-Off Keying proposal for the Blue Books. • The Working Group agrees that each interleaver should be categorized by either the name “coding interleaver” or “channel interleaver”. The working group agrees that we should adopt a common nomenclature for “data rate” based on figure 2-1 of the CCSDS Green Book “Bandwidth Efficient Modulations”. • NASA accepted an action item to propose an update to figure 2-1 to clearly illustrate the nomenclature to be adopted for Pulse Position Modulation • The new schedules for the two Blue Books and two Green Books have the following dates for submission to the Area Director for approval: • Green Book on Real-Time Weather and Atmospheric Data: 30 November 2015 • All other approved books: 28 February 2016

5. SLS AREA REPORT SLS-OPT: Optical Communications Working Group (5 of 10) • NASA Issue (chart 1 of 2): • BACKGROUND on NASA Issue (issue stated on next chart): The current organization of the Blue Books is as follows: • Within each book, there would be three “sections” with possible options within the sections: • (1) High Data Rate • Option 1: ESA / DLR proposal • Option 2: NASA proposal • (2) High Photon Efficiency • (3) Low Implementation Complexity • The corresponding Green Book will be formatted similarly

6. SLS AREA REPORT SLS-OPT: Optical Communications Working Group (6 of 10) • NASA Issue (chart 2 of 2): • NASA has stated that there should be a single “CCSDS recommendation ” for High Data Rate. • Not an ESA / DLR recommendation and separate a NASA recommendation • The recommendation should support space-to-space, space-to-air, and space-to-ground links • NASA also stated that NASA is willing to make changes to the NASA proposal based on technical merit so that it can become the single CCSDS recommendation. • NASA also stated that it is acceptable to release the Blue Books as planned but without the High Data Rate section. • Another option is to release a Blue Book just for High Photon Efficiency and a separate Blue Book just for Low Implementation Complexity while this issue is worked. • NASA indicated that the current High Data Rate proposals could be released as official CCSDS Orange Books if consensus cannot be met

7. SLS AREA REPORT SLS-OPT: Optical Communications Working Group (7 of 10) • ESA/DLR Position on NASA’s Position: • ESA/DLR is surprised about the new NASA position, which is considered a major deviation from the previous agreements (IOAG, IOP-3, and CCSDS) • ESA/DLR would like to stick with the Blue Book layering structure as agreed in the charter. • ESA/DLR would like to create a first set of recommendations encompassing all three regimes. • ESA/DLR is prepared to accept two options for the high data rate regime.

8. SLS AREA REPORT SLS-OPT: Optical Communications Working Group (8 of 10) • CNES Position on Blue Books: • Ideally, CNES would like a single worldwide interoperable high rate recommendation that supports the LEO-to-Earth scenario, among other scenarios.

9. SLS AREA REPORT SLS-OPT: Optical Communications Working Group (9 of 10) • Immediate Plans: • The Optical Communications Working Group holds monthly video teleconference meetings: • 16 December • 20 January • 9 February • 9 March • Example Future Agenda Items (specific dates in agendas): • Report from the Real-Time Weather and Atmospheric Data Team on what comments were received • NASA’s technical concerns concerning the ESA / DLR proposal for a High Data Rate recommendation • Status update on SOTA results after there are clear skies in Tokyo • NASA presentation on its Blue Book material for a High Data Rate recommendation • NASA presentation on its Blue Book material for a High Photon Efficiency recommendation • DLR/IKN presentation on its Blue Book material for a Low Complexity On-Off Keying recommendation

10. SLS AREA REPORT SLS-OPT: Optical Communications Working Group (10 of 10) • Planning for Spring 2015 Face-to-Face Meeting: • Review of the two proposed Draft 1 Blue Books

11. SLS AREA REPORT SLS-OPT: Optical Communications Working Group (6 of 6) • BACKUP CHARTS

12. SLS AREA REPORT • Planning: • The following books have been started: • Blue Book for Optical Communications Physical Layer • Blue Book for Optical Communications Coding & Synchronization • Green Book for Optical communications Concepts and Terminologies • Green Book for Real-Time Weather and Atmospheric Characterization Data • Other planned books are • Green Book for Optical Communications Physical Layer • Green Book for Optical Communications Coding and Synchronization • Blue or Magenta Book(s) for Real-Time Weather and Atmospheric Characterization Data

13. SLS AREA REPORT From Optical Communications Working Group Spring Report • ESA and DLR Proposal for High Photon Flux: • Base the standard on the European Data Relay Satellite System (EDRS) Laser Communication Terminal • User data rate at 1.8 Gbps • EDRS data relay service (EDRS-A, EDRS-C,…) will be operational in orbit for 20 plus years from 2015 • Preoperational tests with LCT on Alphasat since launch (July 2013) • Initial EDRS LEO users: Sentinel 1&2 series (A,B,C,D…) of Copernicus (EU- earth observation satellite prog.) • Sentinel 1A launched in April 2014 EDRS Photo: ESA Sentinel 1A Photo: TAS-I/ ESA