ICD
Pronunciation: I-C-D
Also written as: ICD — Interface Control Document
A formal engineering document that defines the technical interface between two systems or subsystems—such as a ground station and a spacecraft—specifying signals, protocols, frequencies, and data formats.
Full Definition
The ICD is a binding reference document agreed upon by all interfacing parties (e.g., spacecraft manufacturer, ground station operator, launch agency) that precisely defines every technical and operational interface. In satellite ground systems, ICDs govern TT&C signal formats, data rates, modulation schemes, RF connector types, and software protocol versions. Editors working on ICDs must maintain strict version control notation, cross-reference consistency, and precise use of 'shall', 'should', and 'may' in accordance with the applicable standards (e.g., ECSS or MIL-STD). 'ICD' should be expanded on first use.
Usage
Usage note: Use 'shall' for mandatory requirements and 'should' for recommendations within an ICD, per ECSS and ISO/IEC conventions. Verify version number and date on every page header.
In Context
- "The ICD between the mission operations center and the spacecraft defines all TT&C frame structures." — Ground segment design document
- "Any change to the uplink data rate must be reflected in a formal revision of the ICD." — Change control procedure