Improving the Accuracy, Availability, Integrity, Continuity, or Coverage of Positioning, Navigation, and/or Timing Solutions Using Raw Measurements from Global Navigation Satellite System (GNSS) Receivers
Introduction to the Operation and Use of the Transmitted Enhanced Loran (eLoran) Signal
Guidelines for Resilient GNSS Receivers
Standard for Interfacing Resilient GNSS Receivers
Loran or Enhanced Loran (e)Loran Position, Navigation, and Timing (PNT) Interface Specification for the Embedded Global Positioning System and Inertial Navigation System (EGI)
A Guideline for Using the Transmitted Enhanced Loran (eLoran) Signal for Timing, Phase, and Frequency
Receiver Standard for the Transmitted eLoran Signal (SAE9991)
Verification Methods for AS5725 Miniature Mission Store Interfaces
Function-Based API for Gas Turbine Engine Performance Programs
The SAE Aerospace Standard document AS681 is the parent document of this SAE Aerospace Recommended Practice (ARP). AS681 applies to Engine programs written to conform to this document. This ARP specifies a set of functions and their expected behaviors that constitute a function based Application Program Interface (API) for gas turbine engine customer programs. The functions specified in this API are delivered by the Supplier as part of the Engine model.
This document defines generic language independent functions and specific appendices for implementations in C and Fortran.
The function based API specified in this ARP represents an alternative to the Fortran COMMON block structure, as specified in AS4191, historically used to communicate with an engine program. The customer may request emulation of the AS4191 interface if desired.