26 Meeting Delhi India 57 February 2014 Roland Lejeune RTCA SC159 Working Group 2 Summary of Recent Meetings Introduction One RTCA SC159 WG2 meeting took place since IWG25 October 89 ID: 580105
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SBAS IWG #26 MeetingDelhi, India5-7 February 2014Roland Lejeune
RTCA SC-159 Working Group 2
Summary of Recent MeetingsSlide2
IntroductionOne RTCA SC-159 WG2 meeting took place since IWG/25:October 8-9, 2013Main items addressed by WG2:
System status updates
Harmonization of SARPs and MOPS requirements
Outcome of meeting in Russia regarding GLONASS mandateGNSS “score card”GNSS EvolutionReducing errors from signal deformationsCorrecting for time offsets between constellationsRobustness to ionospheric scintillation effectsConcept of Operation for GPS/GALILEO receiverWork plan for GPS L1/L5 receiver and multi-constellation receiver
© 2014 The MITRE Corporation. All rights reserved. Slide3
Summary of discussions (1 of 4)System status updatesEGNOS, GalileoHarmonization of SARPs and MOPS requirementsUpdated NSP paper provided for reviewOutcome of meeting in Russia regarding GLONASS mandateRepresentatives from FAA, Boeing, Airbus, some manufacturers met with Russian civil aviation authorities in Moscow, May 22-23, to obtain clarifications on Russian mandate
Meeting revealed
differences in
perspectives and on information needed for implementation in aircraftBut also a common desire to collaborate towards a multi-constellation standard© 2014 The MITRE Corporation. All rights reserved. Slide4
Summary of discussions (2 of 4)GNSS “score card”Initial version developed by Laurent Azoulai (Airbus)On basis of list of questions developed earlier by EUROCAE
Documents extent to which information needed to support the development of avionics MOPS is available for GNSS core constellations that are, or will be, standardized in Annex 10
GPS, Galileo, Galileo,
BeiDouExpected to be completed for GPS and Galileo for December 2013 EUROCAE meetingInformation from Chinese and Russian providers requestedNote: when score card was discussed at NSP, Russian and Chinese delegations indicated that they will help fill the score card for their constellations
© 2014 The MITRE Corporation. All rights reserved. Slide5
Summary of discussions (3 of 4)GNSS EvolutionProposal from Todd Walter and colleagues to further limit correlation trade space of future receivers to reduce errors from nominal signal deformationIf reference and user receivers are affected by signal deformation the same way, the corresponding post-correction errors affect the clock solution, not the position solution
Paper from Thales on the inadequacy of the Message Type 12 data to correct
for time offsets between
different constellationsData does not account for receiver front-end time delay differences, which can result in errors of several metersRobustness to ionospheric scintillation effectsConsideration being given to a requirement for fast re-acquisition following a loss-of-lock event triggered by ionospheric scintillationFor future DFMC receivers
© 2014 The MITRE Corporation. All rights reserved. Slide6
Summary of discussions (4 of 4)GNSS Evolution (continuation)Concept of Operation for GPS/GALILEO receiverConOps developed by EUROCAE will be made available to WG2Work plan for GPS L1/L5 receiver and multi-constellation receiver
WG2 plans to develop performance requirement in stepwise fashion starting from EUROCAE
ConOps
Initial focus on L1/L5 GPS followed by an expansion to multi-constellationEffort will attempt to capture operational benefitsWG2 agreed to start working actively on a documentTo capture the technical concept of operations and requirements for a L1/L5 GPS and L1/L5 SBAS receiverNot yet a MOPS, but a basis for future MOPS development
© 2014 The MITRE Corporation. All rights reserved. Slide7
AcronymsFAA Federal Aviation AdministrationDFMC Dual-Frequency, Multi-ConstellationGNSS Global Navigation Satellite SystemMOPS Minimum Operational Performance StandardNSP Navigation System PanelSARPs Standards and Recommended PracticesSBAS Satellite-Based Augmentation System
WG2 Working Group 2
© 2014 The MITRE Corporation. All rights reserved.