Localizer Performance with Vertical guidance
Encyclopedia
Localizer performance with vertical guidance (LPV) are the highest precision GPS (WAAS enabled) aviation instrument approach
procedures currently available without specialized aircrew training requirements, such as required navigation performance
(RNP). Landing minima are similar to those in an instrument landing system
(ILS), that is, a decision altitude of 200 feet and visibility of 1/2 mile.
Examples (from Garmin
) are the GNS 480, GNS 430W, 530W, and the post 2007 Garmin G1000
with GIA 63W.
LPV is designed to provide 16 meter horizontal accuracy and 20 meter vertical accuracy 95 percent of the time. Actual performance has exceeded these levels. WAAS has never been observed to have a vertical error greater than 12 meters in its operational history.
As of January 15, 2009 the Federal Aviation Administration has published 1,445 LPV approaches at 793 airports. This is greater than the number of published Category I ILS procedures.
Instrument approach
For aircraft operating under instrument flight rules , an instrument approach or instrument approach procedure is a series of predetermined maneuvers for the orderly transfer of an aircraft under instrument flight conditions from the beginning of the initial approach to a landing, or to a point...
procedures currently available without specialized aircrew training requirements, such as required navigation performance
Required Navigation Performance
Required Navigation Performance is a type of performance-based navigation that allows an aircraft to fly a specific path between two 3-dimensionally defined points in space. RNAV and RNP systems are fundamentally similar. The key difference between them is the requirement for on-board...
(RNP). Landing minima are similar to those in an instrument landing system
Instrument Landing System
An instrument landing system is a ground-based instrument approach system that provides precision guidance to an aircraft approaching and landing on a runway, using a combination of radio signals and, in many cases, high-intensity lighting arrays to enable a safe landing during instrument...
(ILS), that is, a decision altitude of 200 feet and visibility of 1/2 mile.
Examples (from Garmin
Garmin
Garmin Ltd. , incorporated in Schaffhausen, Switzerland, is the parent company of a group of companies founded in 1989 by Gary Burrell and Min Kao , that develops consumer, aviation, and marine technologies for the Global Positioning System...
) are the GNS 480, GNS 430W, 530W, and the post 2007 Garmin G1000
Garmin G1000
The Garmin G1000 is an integrated flight instrument system manufactured by Garmin typically composed of two display units, one serving as a primary flight display, and one as a multi-function display...
with GIA 63W.
LPV is designed to provide 16 meter horizontal accuracy and 20 meter vertical accuracy 95 percent of the time. Actual performance has exceeded these levels. WAAS has never been observed to have a vertical error greater than 12 meters in its operational history.
As of January 15, 2009 the Federal Aviation Administration has published 1,445 LPV approaches at 793 airports. This is greater than the number of published Category I ILS procedures.
External links
- http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/media/MaximizingAirportOperationsUsingWAAS.pdf - FAA -- Maximizing Airport Operations Using the Wide Area Augmentation System
- http://www8.garmin.com/pressroom/aviation/110906.html -- Garmin Receives WAAS Certification for GNS 400W/500W Series
- http://avnweb.jccbi.gov/schedule/production -- FAA's Production Plan for IFR Procedures
- http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/approaches -- FAA LPV Procedures