ISO/TR 22639:2021 PDF

Name: ISO/TR 22639:2021 — Space systems — Design guidelines for multi-geo spacecraft collocation
SKU: ISO/TR 22639:2021
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Space systems — Design guidelines for multi-geo spacecraft collocation

Название (английский):

ISO/TR 22639:2021

Space systems — Design guidelines for multi-geo spacecraft collocation

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 21
Дата публикации:: 7 июля 2021 г.
Издание:: ISO TR 22639 edition 1 version 1
ICS:: 49.140

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Описание (английский):

This document addresses the design process of a collocation and the basic contents of collocation design process which include considerations, initial collocation strategy design, simulation evaluation of collocation strategy, optimal collocation strategy selection and collocation agreement. This document gives guidelines for multi-geo spacecraft collocation, and it applies in particular to multi-geo constellation.

Abstract

Похожие стандарты

Другие стандарты ISO

Overview

ISO/TR 22639:2021 - Space systems - Design guidelines for multi-geo spacecraft collocation provides practical guidance for the design and approval of spacecraft collocation in geostationary-type orbits, with particular focus on multi-geo constellations. The technical report defines a structured collocation design process covering initial considerations, separation strategy design, simulation-based evaluation, optimal strategy selection and the formal collocation agreement between operators.

Key topics and technical requirements

Collocation design process: Stepwise workflow from operator consultation through strategy confirmation and agreement signing (orbit safety consultation, initial strategy proposals, simulation evaluation, iterative refinement, selection and formalization).

Design considerations: Includes ITU frequency/allocation constraints and assigned orbital slots, number of collocated spacecraft, required safety separation distance (dmin - commonly 10 km by past international experience), orbit maintenance needs, orbit determination (OD) precision, flight dynamics perturbations (gravity, solar radiation pressure), fuel budgeting, central management capability, and special restrictions.

Separation strategies: Core options described include:

Complete longitude separation
Coordinated station-keeping
Absolute eccentricity separation
Relative eccentricity vector separation
Combined eccentricity and inclination vector separation Annexes provide characteristics and fundamental principles of each strategy.

Simulation evaluation: Strategies must be validated by simulation accounting for orbit perturbations, orbit control, OD errors and other error sources. Evaluation metrics include ensuring safety separation distances, acceptable orbit maintenance periods, and fuel consumption within budget.

Collocation agreement content: At minimum the agreement should contain an introduction (motivations and parties), a summary of proposed strategies with justification, detailed parameters and data for the final strategy, and an information-exchange plan (formats, cadence and responsibilities).

Technical terms referenced include J2000 geocentric equatorial coordinates, RTN spacecraft coordinate system, inclination and eccentricity vectors, and mean longitude.

Practical applications

Design and operation of multi-geo constellations and GEO slot-sharing arrangements.

Flight dynamics and mission-planning for satellite operators planning collocation with existing spacecraft.

Safety risk assessment, simulation and verification of separation strategies prior to mission execution.

Drafting operational collocation agreements and establishing regular data exchanges between operators.

Related standards and references

ITU regulations on frequency allocation and orbital slot assignment (referenced in considerations)

ISO/TC 20/SC 14 working documents and related space-systems guidance

ISO/TR 22639:2021 is a practical resource for workforce members responsible for safe, efficient and compliant multi-geo spacecraft collocation planning and operations.

ISO/TR 22639:2021 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications

Who should use this standard

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