ISO 22009-2023 PDF

Full title and description

Space environment (natural and artificial) — Model of the Earth's magnetospheric magnetic field. This International Standard specifies the main magnetospheric large‑scale current systems and the requirements for a model of the magnetospheric magnetic field, provides a worked example model and defines parameters and applicability for use in spacecraft engineering, space‑weather research and related calculations.

Abstract

This document describes the main magnetospheric large‑scale current systems and the magnetic field in the Earth's magnetosphere, excludes ionospheric currents, supplies a working example (paraboloid model) and establishes parameter sets for magnetospheric sources that vary with space‑environment conditions. It is intended to support development, testing and evaluation of spacecraft and equipment operating in the space environment.

General information

• Status: Published.
• Publication date: 31 January 2023 (ISO publication stage recorded as 2023‑01‑31).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.140 (Space systems and operations).
• Edition / version: Edition 2 (2023).
• Number of pages: 17 pages (ISO printed/electronic release).

Technical committee: ISO/TC 20/SC 14 (Space systems and operations).

Scope

Sets requirements for magnetospheric magnetic‑field models representing the external (magnetospheric) field in solar‑magnetospheric coordinates typically between 1.0 and 6.6 Earth radii. The standard requires representation of day–night asymmetry, magnetospheric compression by the solar wind and dipole‑tilt effects (geomagnetic dipole tilt angle −35° to +35°), and covers magnetopause screening currents, magnetotail (tail current and closure), symmetric and partial ring currents and region‑1 field‑aligned currents. Ionospheric currents are explicitly excluded. The document also specifies model parameterization, a working example (paraboloid model) and datasets/coordinate guidance for testing and validation.

Key topics and requirements

• Definition and parameterization of magnetospheric sources: magnetopause screening, tail currents, ring currents (symmetric and partial), region‑1 FACs.
• Area of applicability: geocentric distances from ~1.0 to 6.6 Re in solar‑magnetospheric coordinates with dipole‑tilt considerations.
• Dynamics: models expressed as sequences of instantaneous states with parameters tied to empirical drivers (submodels and parameter sets in annexes).
• Validation and test criteria: documentation of modelling approach, data used to derive the model, defined applicability, RMS/error reporting versus independent spacecraft and ground datasets and publication of validation results in accessible scientific literature.
• Worked example: paraboloid magnetospheric model with named parameters (dipole tilt, magnetopause stand‑off distance, tail flux, ring‑current intensity, region‑1 FAC total intensity) provided as an example implementation and test case.

These technical requirements are intended to make model outputs comparable, reproducible and suitable for engineering and scientific applications.

Typical use and users

Used by spacecraft system and mission designers (attitude/magnetic control, magnetometer calibration), space‑weather researchers and model developers, engineers assessing magnetic disturbance impacts (e.g., on power transmission or pipelines), instrument teams validating magnetometer data, and standards organisations seeking interoperable magnetospheric field descriptions. The standard supports modelling, simulation, instrument testing and comparative evaluation of magnetospheric models.

Related standards

Revision of ISO 22009:2009 (withdrawn). Related ISO deliverables from ISO/TC 20/SC 14 and other space‑environment standards include documents on radiation‑belt fluence procedures, geomagnetic reference models and procedures for representing the internal (core) field (ISO 16695 for geomagnetic reference models / internal field representation is commonly referenced). Other ISO/TS and ISO standards addressing space environment effects, modelling and test procedures are closely associated and useful when combining internal (IGRF/ISO 16695) and external field descriptions.

Keywords

magnetospheric magnetic field; magnetosphere; magnetopause; ring current; tail current; field‑aligned currents; paraboloid model; space weather; spacecraft design; model validation; IGRF; geomagnetic dipole tilt.

FAQ

Q: What is this standard?

A: ISO 22009:2023 is an International Standard that specifies requirements for models of the Earth's magnetospheric magnetic field and provides a worked example model to standardize representation and validation of external magnetic‑field models.

Q: What does it cover?

A: It covers large‑scale magnetospheric current systems (magnetopause, tail, ring currents, region‑1 FACs), model parameterization and dynamics for the region ~1.0–6.6 Earth radii, excludes ionospheric currents, and sets out validation/testing expectations including example datasets and a worked paraboloid model.

Q: Who typically uses it?

A: Spacecraft and mission designers, magnetometer/instrument teams, space‑weather researchers, model developers, and engineers assessing electromagnetic/environmental impacts on systems.

Q: Is it current or superseded?

A: Current — ISO 22009:2023 (Edition 2) was published in January 2023 and supersedes the withdrawn ISO 22009:2009.

Q: Is it part of a series?

A: It is part of ISO/TC 20/SC 14's suite of space systems and space‑environment deliverables and is commonly used alongside standards and technical specifications addressing geomagnetic reference models (e.g., ISO 16695) and other space‑environment modelling guidance.

Q: What are the key keywords?

A: magnetospheric magnetic field; magnetosphere; magnetopause; ring current; tail current; field‑aligned currents; paraboloid model; space weather; model validation; IGRF.