Garmin GNS 480, G1000 Program Instructions
WFDE PREDICTION PROGRAM INSTRUCTIONS
WAAS RAIM/FDE PREDICTION PROGRAM INSTRUCTIONS
NOTE: The WFDE Prediction Program is part of the Garmin Trainer and Route Planning software programs. The
required software and instructions are available via the Garmin website at www.garmin.com.
NOTE: The WFDE Prediction Program requires an internet connection to provide access to current almanac, GEO
almanac, and configuration files.
NOTE: These instructions assume the user has experience operating the G1000 with GIA 63W, the GNS480/CNX80,
or the applicable GNS 400W/500W or GTN 6XX/7XX Series Unit and is familiar with the operation of RAIM and
FDE.
Table of Contents
1 OVERVIEW .......................................................................................................................................................................................... 2
1.1 Fault Detection and Exclusion (FDE) ............................................................................................................................................ 2
1.2 Determining When a WFDE Prediction is Required ...................................................................................................................... 2
1.3 Determining When a WFDE Prediction is Required For GTN Products ......................................................................................... 4
2 IDENTIFYING GPS SOFTWARE VERSION .................................................................................................................................... 5
2.1 GNS 400W/500W Series Products................................................................................................................................................ 5
2.2 GNS 480/CNX80 ........................................................................................................................................................................... 5
2.3 G1000 with GIA 63W ................................................................................................................................................................... 6
2.4 GTN 6XX/7XX ............................................................................................................................................................................... 6
3 RUNNING THE FDE PREDICTION PROGRAM ............................................................................................................................. 7
4 INTERPRETING THE FDE PREDICTION RESULTS ..................................................................................................................... 14
5 UPDATING/CHANGING ALMANAC AND CONFIGURATION FILES ...................................................................................... 16
5.1 Almanac, GEO Almanac, and Configuration Files ...................................................................................................................... 16
5.2 Changing the Configuration File ................................................................................................................................................ 17
6 PRINTING .......................................................................................................................................................................................... 18
6.1 Printing the Prediction Results ................................................................................................................................................... 18
190-00643-01 Rev. E
GARMIN WAAS FDE PREDICTION PROGRAM INSTRUCTIONS
1
WFDE PREDICTION PROGRAM INSTRUCTIONS
1 OVERVIEW
The following sections provide an overview of the WFDE Prediction Program and guidelines for when it should
be used. Section 1.2 provides a comprehensive set of guidelines for when a WFDE prediction is required that is
applicable to any installation of a Garmin WAAS enabled unit. Section 1.3 provides specific guidance for GTN
6XX/7XX installations.
1.1 FAULT DETECTION AND EXCLUSION (FDE)
The GARMIN G1000 with GIA 63W, the GNS480/CNX80, and the GNS 400W/500W series products incorporate Fault
Detection and Exclusion (FDE) features, satisfying the requirements of TSO-C145a/C146a and “GPS Oceanic/Remote
Navigation” per FAA AC 20-138A Appendix 1. The GTN 6XX/7XX series products incorporate Fault Detection and Exclusion
(FDE) features, satisfying the requirements of TSO-C146c and “GPS Oceanic/Remote Navigation” per FAA AC 20-138A
Appendix 1. For the purposes of this document, WAAS FDE Prediction, FDE Prediction, and WFDE Prediction may be used
interchangeably.
FDE consists of two distinct parts: fault detection and fault exclusion. Fault detection (RAIM) detects the presence of an
unacceptably large pseudorange error (and presumably, position error) for a given mode of flight or a satellite failure which
can affect navigation. Fault detection is synonymous with RAIM (Receiver Autonomous Integrity Monitoring). Upon the
detection of a fault, fault exclusion follows and excludes the source of the unacceptably large pseudorange error, thereby
allowing navigation to return to normal performance without an interruption in service. FDE functionality is provided for
oceanic, en route, terminal, and non-precision approach phases of flight. The FDE functionality adheres to the missed alert
probability, false alert probability, and failed exclusion probability specified by TSO-C145a/C146a and TSO-C145c/C146c.
The WFDE Prediction Program is used to predict the availability of RAIM/FDE for a specified flight plan. This program
allows the pilot to specify the planned departure date/time, route type, ground speed, ground speed variation, and maximum
allowable outage. When provided through NOTAM or other sources, GPS satellites with known failures can be excluded
through the program's setup function.
NOTE: WAAS is one of several systems generically known as SBAS (Satellite Based Augmentation System). Garmin
WAAS certified products are designed to work with any TSO-C145a/C146a or TSO-C145c/C146c compliant SBAS
system.
The WFDE Prediction Program is designed for use with TSO-C145a/C146a and TSO-C145c/C146c approved WAAS(Wide Area Augmentation System) certified Garmin products. These products include:
• GPS 400W, GNC 420W, GNC 420AW, GNS 430W, GNS 430AW
• GPS 500W, GPS 500W TAWS, GNS 530W, GNS 530W TAWS, GNS 530AW, GNS 530AW TAWS
• GNS 480, CNX80
• G1000 with GIA 63W
• GTN 625, GTN 635, GTN 650, GTN 725, and GTN 750
GARMIN WAAS FDE PREDICTION PROGRAM INSTRUCTIONS
190-00643-01 Rev. E2
WFDE PREDICTION PROGRAM INSTRUCTIONS
1.2 DETERMINING WHEN A WFDE PREDICTION IS REQUIRED
The WFDE Prediction Program determines whether the GPS constellation is robust enough to provide a navigation solution
for the specified route of flight. As required (dependent upon type of flight plan, GPS Software (SW) version, and GPS antenna),
prior to departure the operator must use the WFDE Prediction Program supplied with the applicable trainer or route planning
software to demonstrate that there are no outages in the capability to navigate on the specified route of flight (Table 1).
NOTE: If the route of flight requires an alternate airport, multiple predictions may be required (one for the primary and
one for the alternate) to verify RAIM and/or WAAS satellite availability at the primary and the alternate approach.
A WFDE Prediction is required for the following instances (see also Table 1):
• For all Garmin WAAS enabled units (regardless of the GPS software version or antenna model): an FDE prediction is
required for operations where the route requires Class II Navigation (e.g. Oceanic/Remote operation) and GPS is to be
the primary source of navigation per FAA AC 20-138A Appendix 1. The Oceanic/Remote flight phase occurs when the
flight plan will place the aircraft more than 200 nautical miles from the nearest airport. All operators using a Garmin
WAAS-certified unit as primary means of navigation in oceanic/remote areas under FAR parts 91, 121, 125, and 135
must utilize the WFDE Prediction Program prior to conducting a flight in these areas.
• For all Garmin WAAS enabled units (regardless of the GPS software version or antenna model): a RAIM prediction is
required for operations in areas where SBAS coverage is not available.
• For Garmin WAAS enabled units using an unapproved* GPS antenna (regardless of the GPS software version): a RAIM
prediction is required for all flight operations in accordance with the National Aviation Authority guidelines for TSOC129a equipment. Examples of such operations include navigation of U.S. Area Navigation (RNAV) routes, Standard
Instrument Departures (SIDs), or Standard Terminal Arrival Routes (STARs) per FAA AC 90-100A “U.S. Terminal and
En Route Area Navigation (RNAV) Operations”.
• For Garmin WAAS enabled units using an unapproved* GPS antenna (regardless of the GPS software version): an
operational limitation in the form of a WAAS satellite visibility prediction is required for all LNAV/VNAV, LP, or LPV
approaches.
• For Garmin WAAS enabled units with GPS Software v2.XX or earlier (regardless of GPS antenna model): an operational
limitation in the form of a WAAS satellite visibility prediction is required for all LNAV/VNAV, LP, or LPV approaches.
A WFDE Prediction is not required for the following instances (see also Table 1):
• For Garmin WAAS enabled units with GPS Software v3.XX or later and using an approved* GPS antenna: a RAIM
prediction is not required when operating in areas where SBAS coverage is available.
• For Garmin WAAS enabled units with GPS Software v3.XX or later and using an approved* GPS antenna: a WAAS
satellite visibility prediction is not required for LNAV/VNAV, LP, or LPV approaches.
Route Type GPS SW Version Antenna Type* WFDE Prediction Required?
Oceanic/Remote 2.XX or earlier Approved/Unapproved YES
Enroute/Terminal 2.XX or earlier Approved/Unapproved YES
LNAV/VNAV, LP, or LPV Approach 2.XX or earlier Approved/Unapproved YES
Oceanic/Remote 3.XX or later Approved/Unapproved YES
Enroute/Terminal 3.XX or later Approved NO
Enroute/Terminal 3.XX or later Unapproved YES
LNAV/VNAV, LP, or LPV Approach 3.XX or later Approved NO
LNAV/VNAV, LP, or LPV Approach 3.XX or later Unapproved YES
Operations outside SBAS coverage All versions Approved/Unapproved YES
Table 1
190-00643-01 Rev. E
GARMIN WAAS FDE PREDICTION PROGRAM INSTRUCTIONS
3
WFDE PREDICTION PROGRAM INSTRUCTIONS
* Approved refers to antennas listed in the applicable Installation Manual (Table 2) that allow the Garmin WAAS enabled
unit with GPS software v3.XX or later to meet the TSO-C145a/C146a or TSO-C145c/C146c requirements without requiring
the operational limitations specified in the applicable Installation Manual. Unapproved refers to antennas listed in the
applicable Installation Manual (Table 2) that allow the Garmin WAAS enabled unit (regardless of GPS Software version) to
meet the TSO-C145a/C146a or TSO-C145c/C146c requirements with the operational limitations specified in the applicable
Installation Manual.
Document Name Document Number
GIA 63/GIA 63W Installation Manual 190-00303-05
400W Series Installation Manual 190-00356-02
500W Series Installation Manual 190-00357-02
GNS 480 (CNX80) Installation Manual 560-0982-01
GTN 6XX/7XX AML STC Installation Manual 190-01007-A3
GTN 625/635/650 TSO Installation Manual 190-01004-02
GTN 725/750 TSO Installation Manual 190-01007-02
Table 2
1.3 DETERMINING WHEN A WFDE PREDICTION IS REQUIRED FOR GTN PRODUCTS
For the GTN 6XX/7XX series, a WFDE Prediction is only required in the following circumstances:
• An FDE prediction is required for operations where the route requires Class II Navigation (e.g. Oceanic/Remote
operation) and GPS is to be the primary source of navigation per FAA AC 20-138A Appendix 1.
• A RAIM prediction is required for operations in areas where SBAS coverage is not available.
GARMIN WAAS FDE PREDICTION PROGRAM INSTRUCTIONS
190-00643-01 Rev. E4
WFDE PREDICTION PROGRAM INSTRUCTIONS
2 IDENTIFYING GPS SOFTWARE VERSION
The GPS software version used in the Garmin WAAS enabled unit must be determined prior to performing the WFDE
prediction. The GPS SW version may be a factor in determining if a WFDE prediction is required.
2.1 GNS 400W/500W SERIES PRODUCTS
Identifying GPS Software Version of a GNS 400W/500W Series product:
1) Turn the COM power/volume knob clockwise to turn the unit on.
2) The Main and GPS software version page (Figure 1) appears briefly. Take note of the GPS SW Version.
Figure 1 GPS SW Version Page
2.2 GNS 480/CNX80
Identifying GPS Software Version of a GNS 480 or CNX80:
1) Push the PWR/VOL knob to turn the unit on.
2) Press the FN key and then the SYS key to reach the System functions.
3) Press the VERS function smart key to display the Software Versions Page (Figure 2), note the GPS Engine
Software Version.
Figure 2 Software Versions Page
190-00643-01 Rev. E
GARMIN WAAS FDE PREDICTION PROGRAM INSTRUCTIONS
5
WFDE PREDICTION PROGRAM INSTRUCTIONS
2.3 G1000 WITH GIA 63W
Identifying GPS Software Version of a G1000 with a GIA 63W :
1) With the G1000 in normal mode, use the FMS Knob on the MFD to select the AUX - System Status Page (Figure
3).
2) Note the GPS Software Version.
GPS Software Version
Figure 3 System Status Page
2.4 GTN 6XX/7XX
Identifying GPS Software Version of a GTN 6XX/7XX:
1) Apply power to turn the unit on.
2) From the Home page, touch the System key to reach the System functions.
3) Touch the System Status key.
4) Note the GPS/WAAS Software Version.
GPS/WAAS Software Version
Figure 4 System - System Status Page
GARMIN WAAS FDE PREDICTION PROGRAM INSTRUCTIONS
190-00643-01 Rev. E6
Loading...