Optical Communications Green Book Outline. Green Books are informational, non-normative, supportive...
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Transcript of Optical Communications Green Book Outline. Green Books are informational, non-normative, supportive...
![Page 1: Optical Communications Green Book Outline. Green Books are informational, non-normative, supportive documents to blue books.](https://reader036.fdocuments.us/reader036/viewer/2022082417/56649da75503460f94a9403b/html5/thumbnails/1.jpg)
Optical Communications Green Book
Outline
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Green Books are informational, non-normative, supportive documents to blue books
CCSDSCONCEPTPAPER
MISSION DEPLOYMENT
CCSDSDraftStandard(“Red”, “Pink”)
EXPERIMENTALDEPLOYMENT
Hard Requirement
Hard Requirement Prospective Requirement
CCSDSInformationalReport(“Green”)
CCSDSHistoric(“Silver”)
DECOMMITTEDDEPLOYMENT
CCSDSRecord(“Yellow”)
CCSDSDraftInformational
CCSDSExperimental(“Orange”)
CCSDSDraftPractice(“Red”, “Pink”)
CCSDSProposedStandard(“White”)
NORMATIVE TRACK NON-NORMATIVE TRACK
CCSDSRecommendedPractice(“Magenta”)
CCSDSProposedPractice(“White”)
CCSDSRecommendedStandard(“Blue”)
• CCSDS INFORMATIONAL (GREEN BOOK)
• The “informational” document designation is intended to provide for the timely publication of a very broad range of general information for the CCSDS community.
• Informational documents are often published in support of an experimental specification, a Draft Recommended Standard, or a Recommended Standard.
• They may therefore contain overview or descriptive material, supporting analysis, requirements, descriptions of use, scenarios, etc., which are otherwise inappropriate for the contents of a normative technical specification.
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From CCSDS Optical Communications (OPT) Working Group Concept Paper
Title: Optical Communications Concepts and Terminologies
Document Type: Green Book
Description of Document: This Green Book will define common terminology and atmospheric models to be used in link and pointing budget calculations and define a basic concept of operations, including handovers from one location to the next. For glossary and terminology issues SANA will be consulted in coordination.
Contents of the Green Book:
Terminology Definition Atmospheric Models Link and Pointing Budget Calculation Examples of Concepts of Operations A)
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Optical Communication Green Book Writing Philosophy
1. Description of parameters (terms) specified in Blue Books– Example:
2. 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
3. Links Budgets template with an example– Defining common parameters to be used for links budgets
generation for various scenarios
4. Typical ConOps stages description– Coordinated with ConOps normatives specified in Blue Books
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Details of Terminology Section
– 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)
List below is notional. It will include parameters matching those defined in Blue Books
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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
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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
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ConOps Example– 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
t0 – start of communicationT – operation length