Transcript STAND-ALONE APPROACH OPERATIONS FOR CLASS A GPS

STAND-ALONE APPROACH
OPERATIONS FOR
CLASS A GPS
10-11-12-13 September 2002-Morocco
ARAB INSTRUMENT PROCEDURE DESIGN SEMINAR
1
DOCUMENTATION
 Basic
 TSO
documents
C129()
 TGL( Temporary
 French

guidance Leaflet 3 rev 1
technic note SFACT/N.ST/AVI N°1
Future
 TGL on Approach
operations in progress
Approbation GPS classe A sur approche
2
INSTALLATION GPS CLASSE A
Installation à titre
TYPE
230°
Annonciateurs extérieurs
NAV MSG
GPS WPT APPR
LFYY
BRL
MAP 23
FAF 23
IF 23
2.6 Nm
d ’information
IAF 23
Antenne GPS 1
HSI 1
NAV MSG
GPS WPT APPR
GPS 1
XTLK
GPS 2
Interface
aéronef
(altitude,cap
,..).
Antenne GPS 2
OBS 2
Approbation GPS classe A sur approche
3
TROUBLES

Ergonomy
 adequate

Data base contents
 No

mandate to be in compliance with ARINC code 424
Troubles with CF path terminator
 Direction

integration in the aircraft
of turn
Bad turn inititation
Approbation GPS classe A sur approche
4
PATH TERMINATOR

Class A can interpretate very few Path
terminator
 eg: TF

Solution : use only TF as in Y and T
concept
Approbation GPS classe A sur approche
5
EUROPE AIRWORTHINESS POINT
OF WIEW
 Equipment
requirement: TSO C 129a
Class A1
Improvement
Improvement
of integrity requirement.
of Mode Activation
TSO
C129 is acceptable if previous criteria are
achieved.
 Validation
of turn initiation criteria
Compliant
with ED 75 (RNP MASP) or
equivalent.
 Lot
of gaps in TSO C129
Approbation GPS classe A sur approche
6
WHAT PROPOSALS?
 Validation and checking of the on board material based
on specific flight trials
To carry out at least 3 approach procedure.
Evaluation of the turn initiation fonction
Evaluation of Missed approach phase with autopilot.
Evaluation of FTE (manual, flight director and autopilot)
TGL devoted to approach ( RNP 0.3)
Solution can be « T » or « Y » approach.
Recommeded function :Display system as electornic map
Approbation GPS classe A sur approche
7
Y BAR DESIGN CONCEPT
IAF
IAF
IAF
INITIAL
SEGMENT
70°
IF
Turn initiation
FAF
INTERMEDIATE
SEGMENT
FINAL
SEGMENT
MAPt
TF coding
Approbation GPS classe A sur approche
8
T BAR DESIGN CONCEPT
IAF
INITIAL
SEGMENT
90°
IAF
IAF
IF
INTERMEDIATE
Turn initiation
FAF
SEGMENT
FINAL
SEGMENT
MAPt
Approbation GPS classe A sur approche
9
APPROACH CONSTRAINT


Length

minimum = stabilization distance (MSD)

Initial : Optimal 5 Nm

Intermediate : min 2 Nm + MSD

Final : Optimal 5 Nm
AREA

IAWP , MATWP ,MAHWP :
 1/2 AW =

5Nm XTT = 1.5 Nm ATT = 1 Nm

FAWP : 1/2 AW = 2Nm XTT =0.6 Nm ATT = 0.3 Nm

MAWP : 1/2 AW = 1Nm XTT =0.5 Nm ATT = 0.3 Nm
Descent Gradient

Initial max: 8% optimal
:4 %
Approbation GPS classe A sur approche

Final [ 6.5 cat A/B / 6.1 CAT C/D , 4.3 %] optimal : 5 %
10
DESCENT GRADIENT
CALCULATION
B
IWP
D
IAWP
Gradient = h / TRD
B/2
A
A/2
FAWP
TRD = D -(r* tanB/2) - ( r *tanA/2 ) + (r*/180*B/2) + (r* /180* A/2)
Approbation GPS classe A sur approche
11
GNSS Protection area for initial segment
D
IAWP
IWP
A
D = R.Tan(A/2)+ATT
FAWP
NOW IT IS TIME FOR TRIALS !
Approbation GPS classe A sur approche
13
PAMIERS DEPARURE
034°
Solution : USE TF path terminator
Approbation GPS classe A sur approche
14
Montpellier
Solution : USE another WP to impose
the turn direction
Approbation GPS classe A sur approche
15
Visual Primary
field
Information of
GPS Activation
Approbation GPS classe A sur approche
16