Service Availability Prediction Tool (SAPT)

The Federal Aviation Administration (FAA) is developing a web-based tool, Service Availability Prediction Tool (SAPT), to assist aircraft operators in achieving compliance with the requirements of 14 CFR §§ 91.103, 91.225, and 91.227. Depending on the specific nature of the operator’s request, varying levels of information are necessary for the FAA to process the requests made via this tool. The SAPT has three main tools: Receiver Autonomous Integrity Monitoring (RAIM) SAPT, Automatic Dependent Surveillance – Broadcast (ADS-B) SAPT, and ADS-B Deviation Authorization Pre-Flight Tool (ADAPT). The SAPT user may have to use one or more of these tools depending upon the nature of their request. The SAPT continually collects Global Positioning System (GPS) constellation status (e.g., GPS almanacs) and FAA surveillance status data (e.g., surveillance radars (SSR) and wide area multilateration (WAM)) in order to assess the accuracy and integrity of GPS, FAA backup surveillance availability, and other data in real time. This information is used to determine navigation or to support air traffic control services in terminal, en route airspace, and in airport surface operations. SAPT models the GPS system and matches it with certain specified GPS avionics performance characteristics to determine if there is sufficient position information predicted throughout the flight to use for navigation or surveillance.

The latest form for Service Availability Prediction Tool (SAPT) expires 2029-04-30 and can be found here.

Automatic Dependent Surveillance - Broadcast (ADS-B) Surveillance Availability Prediction Tool (SAPT) - General Aviation

Federal Enterprise Architecture: Transportation - Air Transportation