FAS Data-Block Tool Issues

2nd joint ICAO EUR PBN TF – EUROCONTROL RAiSG meeting

Rick FarnworthEUROCONTROL

12-14 March 2014

ICAO PBN RAiSG 2

Summary

� Introduction to the Eurocontrol FAS DataBlock Tool and its functions� SBAS / GBAS FAS DB Differences� Lessons learned about some elements� Validation

ICAO PBN RAiSG 3

Encode an SBAS FAS Data Block

ICAO PBN RAiSG 4

ICAO PBN RAiSG 5

Decode a Data Block - Hexadecimal

ICAO PBN RAiSG 6

Decode a Binary File

ICAO PBN RAiSG 7

SBAS and GBAS FAS Data Blocks

� Eurocontrol FAS DB Tool will focus on SBAS� For GBAS the needs are different.

� Note that GBAS and SBAS FAS Data Blocks are not the same� Different tools are therefore required.

� SBAS FAS DB include the VAL and HAL. � GBAS FAS DB do not include Alert Limits.

ICAO PBN RAiSG 8

Operation Type

� PANS OPS Definition

� A number from 0 to 15 that indicates the type of the final approach segment. Example: 0 is coded for a straight-in approach procedure including offset procedures. (Codes for other procedures are reserved for future definition.)

� Note that “0” is the only valid input for both straight-in and offset procedures.

ICAO PBN RAiSG 9

Reference Path Identifier (RPI

� Annex 10: the three or four alphanumeric characters used to uniquely designate the reference path.

� PANS OPS: A four-character identifier that is used to confirm selection of the correct approach procedure.

� System: E = EGNOS, W = WAAS, G = GAGAN� Runway Number: e.g. 27� Letter: A for the 1st procedure B for the 2nd etc. excluding L, R, C.

� Example: E27A

ICAO PBN RAiSG 10

Route Indicator

� A single alpha character (Z to A or blank, omitting I and O) used to differentiate between multiple final approach segments to the same runway or heliport. The first approach to a runway is labelled “Z”. Additional alpha characters are incrementally assigned.

� Only used if multiple RNP Approach procedures are published. Normally this field is left blank.

� Chart Title Examples: � Single procedure: RNAV(GNSS) RWY 35, RI field blank� Multiple procedures: RNAV(GNSS) Z RWY 35, RI field = Z

� A second procedure requires a new FAS DataBlock – The RI and RPI fields change and a new SBAS Channel number is required even though the final segment may be identical.

ICAO PBN RAiSG 11

Validation of the FAS DB Tool

� How has the Tool been validated – against which regulatory documents?� There are no regulatory documents specifically applicable to such tools. � The tool has been validated and a report has been made available to

RAiSG participants.

� The tool has been used extensively and has proved to be correct

� Electronic Transfer of FAS DB. � PANS OPS requires FAS DB to be stored as a binary string and

transferred electronically.

� Processes between procedures design organisations and data houses do not exist to accommodate such electronic transfer.

ICAO PBN RAiSG 12