egnos_sol_sdd_in_force.pdf

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S afety o f L ife
Service Definition
Document
Ref : EGN-SDD SoL, V1.0
European Commission
Directorate-General for Enterprise and Industry
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Document Change Record
Revision
Date
Summary of Changes
1.0
02/03/2011
First release of the document
Approved by
Date
Paul Verhoef, European GNSS Programme Manager
02/03/2011
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Table of Contents
1. Executive Summary ................................................................................................................. 1
2. Introduction .............................................................................................................................. 3
2.1. Purpose And Scope Of The Document.............................................................................................3
2.2. Egnos SoL Service Description ........................................................................................................4
2.3. Terms And Conditions Of EGNOS SoL Service Use, Including Liability.......................................4
2.3.1. Scope Of The EGNOS Safety of Life Service Commitment...........................................................4
2.3.2. Who Can Use The EGNOS SoL Service? .....................................................................................4
2.3.3. Obligations Of The Users To Exercise Due Care...........................................................................5
2.4. Reference Documents........................................................................................................................6
3.
Description Of The Egnos System And Egnos SoL Service Provision Environment ....... 7
3.1. High Level Description Of The EGNOS Technical Framework.......................................................7
3.1.1. Satellite Navigation Concept ..........................................................................................................7
3.1.2. Errors Affecting User Positioning ...................................................................................................7
3.1.3. Objective of EGNOS ......................................................................................................................8
3.1.4. GPS Overview................................................................................................................................9
3.1.4.1. GPS Services.......................................................................................................................................... 9
3.1.4.2. GPS Architecture .................................................................................................................................... 9
3.1.5. EGNOS Overview ..........................................................................................................................9
3.1.5.1. EGNOS Services .................................................................................................................................... 9
3.1.5.2. EGNOS: One SBAS Amongst Others................................................................................................... 11
3.1.5.3. EGNOS Architecture ............................................................................................................................. 11
3.2. EGNOS Organisational Framework ................................................................................................15
3.2.1. Bodies Involved in the EGNOS Programme and Service Delivery ..............................................15
3.2.2. How to get Information on EGNOS and EGNOS Applications or Contact the Service Provider..15
4. EGNOS SIS ............................................................................................................................. 17
4.1. EGNOS SIS Interface Characteristics .............................................................................................17
4.1.1. EGNOS SIS RF Characteristics...................................................................................................17
4.1.2. EGNOS SIS Message Characteristics .........................................................................................17
4.2. EGNOS Time and Geodetic Reference Frames .............................................................................18
4.2.1. EGNOS Terrestrial Reference Frame – ETRF 23 ........................................................................18
4.2.2. EGNOS Network Time: ENT – GPS Time Consistency...............................................................19
4.3. EGNOS SIS Performance in the Range Domain ............................................................................20
4.3.1. Accuracy in the Range Domain....................................................................................................20
4.3.2. Integrity in the Range Domain......................................................................................................21
5. EGNOS Receivers .................................................................................................................. 23
5.1.
EGNOS Receivers For Aviation .......................................................................................................23
5.2.
Receiver & Avionics Certifi cation ...................................................................................................23
6.
EGNOS SoL Service Performance........................................................................................ 25
6.1.
EGNOS SoL Service Description and Characteristics ..................................................................25
6.2.
EGNOS SoL Service Performance Requirements .........................................................................25
© European Union 2011
Document subject to terms of use and disclaimers p. 4 - 6
EGNOS SoL SDD, Issue 1.0, February 2011
i
6.3. EGNOS SoL Minimum Service Performance Characteristics ......................................................26
6.3.1. NPA - Non Precision Approach ....................................................................................................27
6.3.1.1. Accuracy ............................................................................................................................................... 27
6.3.1.2. Integrity ................................................................................................................................................. 27
6.3.1.3. Availability ............................................................................................................................................. 27
6.3.1.4. Continuity ............................................................................................................................................. 28
6.3.2. APV-I - Approach with Vertical Guidance ....................................................................................29
6.3.2.1. Accuracy ............................................................................................................................................... 29
6.3.2.2. Integrity ................................................................................................................................................. 29
6.3.2.3. Availability ............................................................................................................................................ 29
6.3.2.4. Continuity .............................................................................................................................................. 30
6.4.
EGNOS SoL Service Limitations .....................................................................................................31
Appendix A.
EGNOS SoL Service Performance Observed During the Independent Performance
Assessment used for EGNOS v.2.2-EXT ............................................................. 33
Appendix A.1
Data ................................................................................................................................33
Appendix A.2
EGNOS SIS Availability ................................................................................................34
Appendix A.3
Accuracy........................................................................................................................34
Appendix A.4
Availability .....................................................................................................................36
Appendix A.5
Continuity ......................................................................................................................37
Appendix B. EGNOS SoL Service Accuracy............................................................................. 41
Appendix C. EGNOS integrity concept ..................................................................................... 43
Appendix D. Defi nitions.............................................................................................................. 47
Appendix E. Acronyms............................................................................................................... 51
ii
© European Union 2011
Document subject to terms of use and disclaimers p. 4 - 6
EGNOS SoL SDD, Issue 1.0, February 2011
List of Figures
Figure 1.
Existing and planned SBAS systems .......................................................................................... 11
Figure 2.
EGNOS architecture ...................................................................................................................12
Figure 3.
EGNOS RIMS sites.....................................................................................................................13
Figure 4.
ENT GPS time offset evolution (Period Feb 2008 - March 2010) ...............................................19
Figure 5.
EGNOS service area used for SREW computation ....................................................................20
Figure 6.
EGNOS NPA availability..............................................................................................................27
Figure 7.
EGNOS NPA continuity ...............................................................................................................28
Figure 8.
EGNOS APV-1 availability...........................................................................................................29
Figure 9.
EGNOS APV I continuity .............................................................................................................30
Figure 10.
Network of monitoring stations....................................................................................................33
Figure 11.
EGNOS SIS availability...............................................................................................................34
Horizontal position error histogram for PRN124 (logarithmic plot ) ..............................................35
Figure 12.
Figure 13.
Vertical position error histogram for PRN124 (logarithmic plot) ..................................................35
Figure 14.
Horizontal position error map for PRN124 ..................................................................................35
Figure 15.
Vertical position error map for PRN124.......................................................................................35
Figure 16.
EGNOS combined availability for PRN120-PRN124 ..................................................................36
Figure 17.
Compliance to the 99% Availability reference baseline...............................................................37
Figure 18.
EGNOS combined continuity for PRN120-PRN124....................................................................38
Continuity Compliance to the 10 -4 reference...............................................................................38
Figure 19.
Continuity Compliance to the 5×10 -4 reference...........................................................................38
Figure 20.
Figure 21.
APV-I accuracy expected from EGNOS......................................................................................41
Figure 22.
Possible situations when navigating with EGNOS ......................................................................45
Figure 23.
ECAC service volume .................................................................................................................49
Figure 24.
ECAC landmasses ......................................................................................................................50
© European Union 2011
Document subject to terms of use and disclaimers p. 4 - 6
EGNOS SoL SDD, Issue 1.0, February 2011
iii

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