This SAE Aerospace Standard (AS)/Minimum Operational Performance Specification(MOPS) specifies the minimum performance requirements of Ground Ice Detection Systems(GIDS). These systems may be mounted onboard the airplane, or be ground-based. Theymay provide information for indication and/or control.Chapter 1 provides information required to understand the need for the GIDS characteristicsand tests defined in the remaining chapters. It describes typical GIDS applications andoperational objectives and is the basis for the performance criteria stated in Chapter 3through Chapter 5. Definitions essential to the proper understanding of this document areprovided in Chapter 1.Chapter 3 contains general design requirements for an ice detection system used duringground operations.Chapter 4 contains the Minimum Operational Performance Requirements for the GIDS,defining performance under icing conditions likely to be encountered during groundoperations.Chapter 5 describes environmental test conditions providing laboratory means of testing theoverall performance characteristics of the GIDS under conditions which may be encounteredin actual operations.Chapter 6 describes recommended test procedures for demonstrating compliance withChapters 3 and 4.Chapter 7 contains the Minimum Operational Performance Requirements for installed GIDS.Ground and flight tests are included when performance cannot be adequately determinedthrough testing under standard test conditions.