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GB/T 47036-2026Analytical calculation method for the orbital perturbation of space objects (English PDF)

空间物体轨道摄动解析计算方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

January 28, 2026

Implementation date

May 1, 2026

Scope

GB/T 47036-2026 is the English-translated version of 空间物体轨道摄动解析计算方法.

GB/T 47036-2026 is the Chinese standard "Analytical calculation method for the orbital perturbation of space objects". Its scope clause reads: This document describes an analytical calculation method for the orbital perturbation of a space object.

This document applies to calculations such as instantaneous radical transformation and orbital extrapolation for space objects orbiting the Earth. It is used for space target cataloging and navigation.

Specific tasks include spacecraft tracking and control and operation management, collision risk calculation, long-term orbit evolution, orbit life estimation, safety avoidance and deorbit strategy formulation, etc. Calculate the scenario. Its clauses include terms and definitions.

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Document preview — GB/T 47036-2026

National Standard of the People's Republic of China

ICS: 49.140
Classification: V 70

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4 Symbols
4.1 Basic Symbols
4.2 Auxiliary Symbols
5 General Requirements
5.1 Time System
5.2 Coordinate System
5.3 Orbital State Quantities
5.4 Normalization
5.5 Orbit Type Classification
6.Basic Model for Analytical Calculation of Orbital Perturbation of Space Objects
6.1 Relationship between instantaneous roots and average roots
6.2 Change of average number of roots over time
7.1 Calculation process for converting instantaneous roots to average roots
7.2 Calculation process for converting average root number to instantaneous root number
7.3 Calculation process of extrapolated average roots
7.4 Calculation process for extrapolated instantaneous roots
Appendix B (Informative) Physical Model Parameters Applicable to the APS Method
Appendix C (Normative) Analytical Calculation Formula for Orbit Perturbation using the APS Method
Appendix D (Informative) Analytical Calculation Formulas for Extended Perturbations Using the APS Method
Appendix E (Informative) Reference and Suggestions for Using the APS Method
References

1 Scope

This document describes an analytical calculation method for the orbital perturbation of a space object.

Calculate the scenario.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 30114.3 Terminology for Space Science and its Applications Part 3.Space Astronomy

GB/T 43223 Specification for Orbital Data of Space Objects

GB/T 45621 Space Terminology - Space Debris

3 Terms and Definitions

The terms and definitions defined in GB/T 30114.3, GB/T 43223 and GB/T 45621, as well as the following terms and definitions, apply to this document.

3.1 non-singular element

The orbital parameters defined based on Kepler elements eliminate one or more singularities that could cause the definition of Kepler elements to fail.

Note. One type of orbital element.

3.2 Orbit perturbation

For a space object orbiting the Earth, in addition to the Earth's two-body gravitational pull, other disturbances affect its orbit.

3.3 short-period term

The terms with short periods and rapid changes in the orbital elements of a space object.

Note. In mathematics, this type of term is represented by an average value of zero over the orbital period.

3.4 Instantaneous roots osculating element

Keplerian elements or singularity-free elements that describe the actual orbital state of a space object at a given moment.

Note. Also known as "instantaneous roots", "kissing root count", or "closest root count".

3.5 mean element

The value obtained by subtracting the short-period term from the instantaneous roots at a given moment can describe the average motion of a spatial object at that moment.

Keplerian roots of a state or roots without singularities.

Note. Also known as "flat root". Sometimes the average number of roots defined in this way is also called the pseudo-average root or pseudo-flat root.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 44 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 30114.3Terminology for space science and applications - Part 3: Space astronomy

Cited by

GB/T 47263-2026Space debris environment engineering model

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