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This presentation by Hank Cabler, Co-Chairman of SOIT, provides an overview of the history, approvals, and current status of GNSS in FAA, including GPS, WAAS, LPV, LNAV/VNAV, and LAAS.
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FAA SATNAV APPROVALS ICAO CAR/SAM ATN/GNSS SEMINAR Presentation GNSS 7.3 by Hank Cabler Co-Chairman, SOIT
History • 1993 GPS Approved for use in multi-sensor applications (FMS) • also Phase 1 overlays • 1994 GPS Approved for IFR use • Enroute • Domestic--same as other RNAV systems • Oceanic--used only with dissimilar LRNS • Terminal--SIDS & STARS • Approach--overlays & stand-alone • 1995 GPS “Primary-means” approval for oceanic & remote • 1999 GPS SCAT-1 approval • 2001 WAAS approved for VFR
Current Status • GPS Approaches ~3500 • New RNAV approach chart • Designed to support WAAS, GPS, RNP 0.3, FMS Baro-VNAV • WAAS (SBAS) LNAV/VNAV Commissioning Scheduled in 2003 • LPV - new approach concept • LAAS CAT I in 2004 • LAAS CAT II & III later • RNP/RNAV standards development underway
GPS Docs • GPS IFR • AC 90-94-- GPS operational guidance • TSO C-129A--equipment standard • AC 20-130 & 20-138--installation standard • Oceanic & Remote • HBAT 95-09--operational guidance • N8110.60--equipment standard • HTTP://GPS.FAA.GOV
New RNAV Approach Plate • Approach and landing operations with vertical guidance (APV) - An instrument approach and landing which utilizes lateral and vertical guidance but does not meet the requirements established for precision approach and landing operations. • LPV - a new line of minima using the Wide Area Augmentation System (WAAS). This approach combines the lateral precision of a localizer with the vertical performance of APV-1. Provides significant operational benefits as compared to LNAV/VNAV approaches. • LNAV/VNAV - A vertically guided approach with a decision altitude down to 350 feet above the runway touchdown point (HAT). Requires a WAAS-certified receiver (or certain Flight Management Systems with barometric VNAV). Visibility requirements are generally one mile at airports without approach lighting systems. • LNAV - A nonprecision approach (no vertical guidance) with a minimum descent altitude (MDA) of 250 feet above obstacles along the flight path. At many airports, LNAV approaches will have lower minimums than existing VOR or NDB approaches. LNAV approaches can be conducted today with approach-certified (TSO-129) GPS receivers.
WAAS Status • WAAS Prime Contract Development Is Ahead Of Schedule • Contractor Acceptance Is Expected In Second Quarter Of FY 03 • Commissioning Expected By Dec 03 • WAAS Hardware Is Fielded And Software Development Completed To Provide A Signal-In-Space • Software Integrity Monitors And Safety Analyses Are Being Revised To Insure System Certification For IFR Use • WAAS Is Being Developed Using An Incremental Strategy To Provide Benefits As They Become Available • GEO Satellite Acquisition Activities Underway • System Is Broadcasting 24/7 And Is Providing A Robust And Reliable Signal-In-Space To A Variety Of Users
LAAS Status • Government Industry Partnership (GIP) to develop non-Fed CAT I system under FAA Type Acceptance process (Honeywell, Raytheon, Thales) • Honeywell - “Beta LAAS” at ORD, MDW, MEM, SEA • Raytheon prototype (SCAT conversion) at SLC • Thales prototype planned at New Century Airport, KS • First LAAS CAT I commissioned December 2004 • CAT II & III later • User Requirements: CAT I with advanced procedures ASAP!
Questions?? • hank.cabler@faa.gov • http://gps.faa.gov
