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Optical Communications Green Book Outline

Optical Communications Green Book Outline. Green Books are informational, non-normative , supportive documents to blue books. From CCSDS Optical Communications (OPT) Working Group Concept Paper. Optical Communication Green Book Writing Philosophy.

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Optical Communications Green Book Outline

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  1. Optical Communications Green Book Outline

  2. Green Books are informational, non-normative, supportive documents to blue books

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

  4. Optical Communication Green Book Writing Philosophy • Description of parameters (terms) specified in Blue Books • Example: • Common Atmospheric Models recommended to support optical links selection during preparatory and hand-off 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 • Typical ConOps stages description • Coordinated with ConOpsnormatives specified in Blue Books

  5. 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. Atmospheric Optical Channel Models • CFLOS Model • Atmospheric Loss Model • Turbulence Model(s) • Measured parameters defined in Atmospheric Green Book are inputs to models • Models’ outputs directly or indirectly define link budget parameters

  7. Link and Pointing Budget Template • Defines common parameters to be used to construct various types of link budgets • Example from Optical Link Study Group’s (OLSG) Final Report

  8. ConOps Example • t0 – start of communication • T – operation length • Links Selection (t = t0 – x hours) • Laser Safety activities • CFLOS and Atmospheric Turbulence • Ephemeris Data Distribution • Links Establishment (t = t0– y minutes) • Initialization (Pointing) • Acquisition • Tracking • Links Operation (t = t0+) • Data Communication • Telemetry Exchange • Handover • Links termination and post operation (t = t0+ T) • Links Graceful Termination • Links Performance Correlation with Atmospheric Statistics and Atmospheric Models updates • Post Operation Maintenance

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