ISO 13526:2010

Overview

ISO 13526:2010 - Space data and information transfer systems - Tracking data message (TDM) - defines a standard message format for exchanging spacecraft tracking data between space agencies. Published by ISO and based on CCSDS 503.0-B-1, this International Standard standardizes how routine interagency cross-support tracking outputs are packaged and shared so missions managed by one agency can be tracked by another agency’s ground stations. The result is predictable, interoperable tracking-session allocation and automated data interchange across international ground networks.

Key technical topics and requirements

• Standard message format: A defined TDM structure to carry tracking observables and supporting metadata for interoperable exchange.
• TDM structure and content: Logical divisions such as the TDM header, metadata block, and data section (described in sections 3.x of the standard).
• Syntax rules: Line and value formats, units conventions, and comment handling are specified to ensure machine- and human-readable consistency (section 4.x).
• Observables supported: Examples and templates (Annex D) show common items like angles, range, Doppler/frequency, delta-DOR, media and meteorological data, and clock bias/drift-useful for a wide variety of tracking products.
• Time systems and reference frames: Normative guidance for time_system and reference_frame values is provided (Annex A).
• Security considerations: High-level guidance on data security concerns, threats and implementation specifics (section 5).
• Interface control and documentation: Informative material for Interface Control Documents (ICDs) and rationale for design choices (Annex B, F, G).

Practical applications

• Enabling interagency cross-support where a spacecraft managed by Agency A is tracked by Agency B’s ground station.
• Automating distribution of tracking data for orbit determination, mission operations, and navigation teams.
• Facilitating allocation and scheduling of alternate tracking resources across international ground networks.
• Serving as a baseline for derived agency standards and implementation profiles that can adopt subsets or add mission-specific features.

Who should use this standard

• Space agencies and mission operations centers coordinating cross-support tracking.
• Ground station network operators and scheduling systems.
• Flight dynamics, navigation, and mission-planning engineers processing tracking observables.
• Systems engineers and integrators developing ICDs, data parsers, or archive systems for tracking data exchange.

Related standards

• CCSDS 503.0-B-1 (Tracking Data Message) - the CCSDS Recommended Standard adopted as ISO 13526:2010.
• References noted in the ISO text: CCSDS 301.0-B-3 ≡ ISO 11104:2003 and CCSDS 502.0-B-1 ≡ ISO 22644:2006 (contextual cross-references).

ISO 13526:2010 is essential for interoperable, repeatable spacecraft tracking data exchange and for organizations that require a common, well-documented TDM baseline for international cross-support.