EUROCONTROL Navigation Domain

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EUROCONTROL Navigation Domain

• The Data Collection Network
• EGNOS revealed
• GNSS 2004 Rotterdam, The Netherlands
• Santiago Soley, PILDO Labs S.L.

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Summary

• EUROCONTROL GNSS-1 Operational Validation
• The Data Collection Network
• A Methodology to assess EGNOS performance
• First Glance
• Anomaly Investigation
• Towards the Final Results
• Conclusions and Future Work

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EUROCONTROL
The European Organisation for the Safety of Air
Navigation
The European Organisation for the Safety of Air
Navigation
32 Member States
31 Member States
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GNSS-1 Operational Validation

• EUROCONTROL will coordinate the GNSS-1
  Operational Validation
• To support the Member States in achieving the
  approval for the provision of EGNOS services
  throughout ECAC (European Civil Aviation
  Conference)
• Two distinct areas of work
• Technical Validation of the performance
• SARPS requirements RNP values
• MOPS DO229C compliant receiver
• Definition of operational rules and procedures
  for aircraft to use the system for a particular
  application (APV implementation)

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The Data Collection Network Objectives

• Collect ESTB/EGNOS Data and Evaluate them from
  different sites in Europe
• Group of experts to support
• the development of the tools need in the future
  EGNOS Operational Validation - PEGASUS
• definition of data collection and processing
  procedures
• Baseline for the future static campaign in the
  GOV Plan extended with the Air Navigation
  Service Providers participation

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The Network
Tromsö
ESTB reference station (RIMS) EURIDIS
reference station ESTB processing facilities
(CPF, MCC) NLES
Höfn
Hönefoss
IOR PRN131
Rotterdam
Scilly
Toulouse
Lisboa
Barcelona
Fucino
Ankara
Palma
Malaga
Kourou
Matera
Canaries
Hartebeesthoek
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The Methodology
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A First Glance

• Proposed algorithms

• single site/day

EGNOS post-SIS1 EEC, April 23rd, 2004
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Summary of results Vertical Position Error 95
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Summary of results APV-II Availability (AL 20m)
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Anomaly Investigation

• What to do if some anomalies appear that makes
  some of the test fail?
• Just a first check on the obtained performance is
  not enough to declare the system not compliant
  with the requirements
• detailed analysis on what caused a test fail
• Different methods and techniques used by the
  Network

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Example 1 Jump on the VPE
Jump on the position error periodically
experienced
Delft, December 26th, 2002
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Example 1 Jump on the VPE
Multipath
Mc combination
Delft, December 26th, 2002
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Example 2 Integrity Failures
Integrity failures HPEgtHPL
Barcelona, February 6th, 2003
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Example 2 Integrity Failures
MT02/03 anomalies
Psedorange correction oscillations broadcast in
MT02 and MT03 UDREIlt12 IODFlt3
Barcelona, February 6th, 2003
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Example 3 Integrity Failures
MT26 anomalies
60 MI in about 500 epochs
Barcelona, September 12th, 2002
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Example 4 Integrity Failures
8 consecutive MI
Barcelona, May 22th, 2003
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Example 4 Integrity Failures
satellite clock jump
Fast Corrections UDREI
NO Alarm Conditions (IODF lt3 UDREIlt15)
9 s
Sudden jump in C1 code Pseudorange for PRN
29. The ESTB declares the sat. as NOT
MONITORED (UDREI14) 9 sec. after.
Prefit- residuals
Barcelona, May 22th, 2003
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Example 5 Integrity Failures
VPE/VPL
Large number of MI
2040
1917
Barcelona, November 20th, 2003
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Example 5 Integrity Failures
PRN16 C1-Rho (shifted)
PRN16 L1-L2 (shifted)
PRN16 P2-P1 (shifted)
STEC (m L1)
PRN16 STEC /- UIRE (ESTB)
2040
1917
Barcelona, November 20th, 2003
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Example 5 Integrity Failures
Ionospheric storm
Kp index from Oct. 17th up to Dec. 1st 2003
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Towards the final results

• To validate SARPS requirements in a reasonable
  period of time just the data collected from the
  network would not be enough
• simulations or other methods get up to the
  required level of confidence from the
  measurements
• Impossible to do it for all locations under all
  conditions
• extrapolation of the local results from the
  network sites
• Global Assessment

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The Global Monitoring System
GPS networks
24h RINEX files
Automatic data gathering
BRUS
PEGASUS
24h GPS and GEO binary data
Automatic daily processing
INTERNET
Slog
Automatic data collecting
Automatic results presentation
Receiver
WEB server
e-mail
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The Global Monitoring System

• Cross-check with simulations
• Network results extrapolation
• Global Assessment

HPE 95 Integrity Events
HPL 99 satellites used
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Conclusions

• Summary of the activities from the Data
  Collection Network Eurocontrol
• gain knowledge on how the data need to be
  collected, processed and analysed EGNOS
  Operational Validation
• Methodology (3 axis)
• Actual performance- First glance report
• System Behaviour - Anomaly investigation
• Confidence, Extrapolation Global Monitoring
  System
• Dynamic trials

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Future Work

• Improving the network layout and the automation
  of procedures
• continuous data logging
• automated results data sharing - ftp
• Potential data exploitation and validation of the
  Global Monitoring System results
• harmonization with the network sites ones
• Data campaigns with the first EGNOS SIS
• reuse of all the ESTB lessons learned
• expected that the encountered anomalies rarely
  happen
• EGNOS SIS-1 confirms that

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Questions?