1. CAR/SAM ATN GNSS SEMINAR VARADERO, CUBA 8 MAY 2002
PROCEDURES FOR AIR NAVIGATION SERVICES-
OPERATIONS (PANS OPS ICAO DOC. 8168)
Barry Billmann Federal Aviation Administration
Presentation GNSS 6.1

2. OVERVIEW
RESULTS OF OBSTACLE CLEARANCE PANEL (OCP-12) MEETING JULY 1999 CONCERNING GNSS
CURRENT OCP ACTIVITIES REGARDING GNSS AND AUGMENTED GNSS
ILS EQUIVALENCE METHODOLOGY FOR CRITERIA DEVELOPMENT
BAROMETRIC VNAV
GOALS FOR OCP 13

3. OCP 12 OUTCOMES-BASIC GNSS
RESULTS INCLUDED IN PANS OPS AMENDMENT 12
Effective November 2001
PANS OPS VOL. I (PILOT INFORMATION)
Chapter 7 Part II Basic GNSS Procedures
Equipment Operational Characteristics
Equipment Performance Characteristics
Annex 10 Information Augmented with RTCA DO - 208
VOL. I MATERIAL TO BE UPDATED WITH AMENDMENT 13
OTHER PRODUCTS – CHARTING AND PROCEDURE NAMING

4. OCP 12 OUTCOMES-BASIC GNSS
PANS OPS VOL. II CRITERIA BASED ON ANNEX 10 PERFORMANCE & BASIC GNSS AVIONICS REQUIREMENTS
BASIC GNSS RNAV CRITERIA
Non-Precision Approach (LNAV)
Departure Criteria
Terminal Arrival Criteria
BAROMETRIC VNAV CRITERIA
LNAV/VNAV
Criteria Will Be Updated at OCP-13

5. OCP 12 OUTCOMES-BASIC GNSS
GNSS RNAV CRITERIA USES BOTH ACCURACY AND INTEGRITY PERFORMANCE REQUIREMENTS
Criteria is Tighter than DME/DME RNAV or VOR/DME Criteria
Uses Linear Nature of GNSS Navigation System Error
US TERPS & PANS OPS CRITERIA CONSISTENCY
Differences in Barometric VNAV Surfaces

6. CURRENT OCP ACTIVITIES BASIC GNSS
FOCUS IS ON VERTICALLY GUIDED APPROACHES IN RESPONSE
TO ICAO CFIT INITIATIVE
DEVELOPMENT OF VISUAL PROTECTION SURFACE FOR VERTICALLY GUIDED APPROACHES
Similar to US TERPS Glideslope Qualification Surface (GQS)
PANS OPS VOL. I
Update Pilot Information on Multi-Sensor RNAV
Include Information on Barometric VNAV Procedures

7. CURRENT OCP ACTIVITIES BASIC GNSS
COLD TEMPERATURE COMPENSATION INFORMATION FOR
BAROMETRIC VNAV PROCEDURES IN VOL. I & II
PANS OPS VOL. II AMENDMENTS
Update Barometric VNAV Criteria
Closer to US TERPS Criteria
Visual Protection Surface For Vertically Guided Approaches
Slightly Steeper than Annex 14 Surface

8. CONVAIR COLD TEMP TESTING
Dual Element Temp. Probe
& Air Data Sensor
Pitot Tube (2)
Static Source (2)
VNAV SENSOR ELEMENTS

9. COMPARISON WITH PANS OPS ALTITUDE ERROR FOR –10oC
HAA*
200
300
400
500
600
700
800
900
1000
1500
2000
PANS 20 30 40 50 60 70 80 90
100
150
TEST
MEAN 11 17 25 37 45 52 61 72 82
127
168
MEAN +
2 SD 41 42 49 59 69 76 88 98
110
161
225
Notes: All Values In Feet
HAA = Height Above Airport

10. COMPARISON WITH PANS OPS ALTITUDE ERROR FOR –20oC
HAA*
200
300
400
500
600
700
800
900
1000
1500
2000
PANS 30 50 60 70 90
100
120
130
140
210
280
TEST
MEAN 11 14 23 34 44 56 68 78 89
142
202
MEAN +
2 SD 64 75 83 95
119
136
146
206
252
Notes: All Values In Feet
HAA = Height Above Airport

11. Steeper than Standard Lapse Rate: Lapse Rate Lessens Close to Surface
“Conservative” Error
In GPA Close to DA &
Excellent Compensated
Performance
Steeper than standard lapse rate, causing large initial overshoot in Vdev#1

12. BASIC GNSS HELICOPTER POINT-IN-SPACE PROCEDURES

13. CURRENT OCP ACTIVITIES- SBAS
SATELLITE BASED AUGMENTATION SYSTEM (SBAS) VOL. I MATERIAL DRAFTED
SBAS VOL. II MATERIAL
SBAS Precision Approach Criteria
SBAS Terminal Criteria
SBAS VOL. II MATERIAL DIFFERENTIATING BAROMETRIC VNAV
PERFORMANCE FROM SBAS VERTICAL PERFORMANCE
NEW SBAS APPROACH PERFORMANCE SERVICE - LPV
Lateral Performance Equivalent to Localizer (HAL = 40 m)
Vertical Performance (20 m < VAL < 50 m)

14. CURRENT ACTIVITIES-GBAS
GROUND BASED AUGMENTATION SYSTEM (GBAS) VOL. I MATERIAL
Differences Between SBAS and GBAS
ILS Look Alike Performance on Final Approach Segment
Lateral & Vertical Deviations and Distance to Threshold
GROUND BASED AUGMENTATION SYSTEM (GBAS) VOL. II MATERIAL
Precision Approach Criteria
Use of ILS Cat. I Collision Risk Model for GBAS Procedure
Design

15. CURRENT ACTIVITIES ILS EQUIVALENCY
DEMONSTRATE GBAS AND SBAS ACCURACY PERFORMANCE
EQUIVALENT TO CAT. I ILS
OCP-12 REPORT DESCRIBED METHODOLOGY
Well Structured Flight Tests
TSE Performance Per Collision Risk Model Manual
TSE, FTE, NSE Performance Per RNP Manual For Approach,
Landing & Departure Operations (Draft)
RESPONSE FROM 2 STATES AND 1 ORGANIZATION
RESULT: EQUIVALENCE DEMONSTRATED
Criteria to be Based on Existing ILS Criteria

16. KING AIR GPS INSTALLATION

17. EUROCONTROL/UK NATS GBAS TRIALS

18. OTHER CURRENT ACTIVITIES
DEVELOP CRITERIA SPECIFICALLY FOR BAROMETRIC VNAV
DEVELOP SBAS TERMINAL CRITERIA THAT IS MORE
STRINGENT THAT BASIC GNSS TERMINAL CRITERIA
FINALIZE SBAS APPROACH PERFORMANCE LEVELS
GNSS PANEL
OBSTACLE CLEARANCE PANEL
OPERATIONS PANEL

19. PLANS FOR OCP - 13 MEETING IN MONTREAL IN OCTOBER 2002
RESULTING AMENDMENTS TO BE EFFECTIVE NOVEMBER 2004
PANS OPS VOL. I AMENDMENTS FOR:
Basic GNSS with Barometric VNAV
SBAS Performance Levels
GBAS Described as ILS Look Alike Procedure

20. PLANS FOR OCP - 13
DESCRIPTION OF NEW SURFACE CALLED THE VISUAL PROTECTION SURFACE FOR VERTICALLY GUIDED APPROACHES
ADMENDMENT OF BASIC GNSS BAROMETRIC VNAV CRITERIA
SBAS AMENDMENTS
Terminal and Precision Approach Criteria
OTHER ACTIVITIES
Precision and “LOC” Only Criteria
Use of Cat. I ILS Collision Risk Model
Helicopter Point-in-Space Criteria