Optical Communications Green Book Outline

1. Optical Communications Green Book Outline Blue Book for Optical Communications Physical Layer Green Book for Optical Communications Concepts and Terminologies Blue Book for Optical Communications Coding & Synchronization Green Book for Real-Time Weather and Atmospheric Characterization Data

2. Green Books are informational, non-normative, supportive documents to Blue/Magenta Books From CCSDS “Boot Camp” presentation, Oct 2012

3. From CCSDS Optical Communications (OPT) Working Group Concept Paper

4. Optical Communication Green Book Writing Philosophy • Description of parameters (terms) specified in our Blue Books • For example: Blue book may state requirement for modulation extinction ration. This green book will provide definition of extinction ratio, how it can be measured, etc • Common Atmospheric Models recommended to support optical links selection during preparatory and handover planning • Utilizing measured atmospheric parameters data defined in Atmospheric Green Book • Links Budgets template with an example • Defining common parameters to be used for links budgets generation for various scenarios • Link Budget Example for one (or few) of the most common links • Typical ConOps stages description • Coordinated with ConOpsnormative specified in Blue Books

5. “This Green Book will define common terminology. … ” Details of Terminology Section • List below is notional. It will include parameters matching those defined in Blue Books • Physical Layer Terminology • Clock Description (Rate, Jitter, Drift) • Communication Pulse (Shape, Modulation Format and Rate) • Optical Characteristics (wavelength, Polarization, Linewidth, etc) • Digital Domain Terminology • Data Rates • Data Framing • Coding Description • Description of Interleaving Process • In-band Command and Telemetry Processing • Performance Metrics • EIRP • PFD • Implementation Penalties • Error Rates • PAT Terminology • Beacon (configuration, Spectrum, Power, Modulation) • Pointing (Ephemeris, Scanning) • Acquisition (Spatial, Clock and Frame) • Tracking (Coarse, Fine)

6. “This Green Book will define … atmospheric models to be used in link and pointing budget calculations” Atmospheric Optical Channel Models • Measured parameters defined in Atmospheric Green Book are inputs to atmospheric models of this book • Outputs of atmospheric models directly or indirectly define link budget parameters and support Concept of Operations (Optical Ground Station selection for link, communication data rates, etc.) • Examples

7. “This Green Book will … be used in link and pointing budget calculations” Link and Pointing Budget Template Defines common parameters to be used to construct various types of link budgets: • Antennae Gain • Optical Losses • Transmit Power • Etc And provides their description Link Budget example from Optical Link Study Group’s (OLSG) Final Report:

8. “This Green Book will … define a basic concept of operations, including handovers from one location to the next.” ConOps Example • t0– start of communication • T – operation length • Links Selection (t = t0 – x hours or even days) • Laser Safety activities • CFLOS and Atmospheric Turbulence • Ephemeris Data Distribution • Elements preparations: performance and connectivity checks, etc) • Links Establishment (t = t0– y minutes) • Initialization (Pointing) • Acquisition • Tracking • Links Operation (t = t0) • Data Communication • Telemetry Exchange • Handover (scheduled and un-scheduled) • Laser safety interruptions and recovery • Links termination and post operation (t = t0+ T) • Links Termination • Links Performance Correlation with Atmospheric Statistics/ Atmospheric Models updates • Post Operation Maintenance