ION GNSS SDR Metadata Standard Working Group Report - - PowerPoint PPT Presentation

ION GNSS SDR Metadata Standard Working Group Report

Presentation/Minutes/Attendee Lis ist

Session F2: GNSS Receiver Processing in Degraded Environments 2 Wednesday, September 26, 2018, 5:30 pm Monroe Miami, FL

Content

• Introduction to the SDR GNSS Metadata Standard
• Use cases
• Request for comments 1
• Activities performed in 2018
• Request for comments 2
• way forward to approval
• Working group meeting

Introduction to the SDR GNSS Metadata Standard

• Proliferation of GNSS SDR technology in the last years
• SDR data collection systems output data in various formats
• Does not promote interoperability and data/resource sharing and re-use
• This standard gives a solution
• Unambiguous transfer of all essential SDR metadata
• Promotes interoperability and data portability, resource sharing, re-use

Introduction to the SDR GNSS Metadata Standard

• Standardization started in 2013 to facilitate exchange of samples
• Slow but steady progress of numerous institutions and people
• Mostly voluntary activity
• Standard document at sdr.ion.org contains:
• A methodology to describe virtually all possible binary sample file formats
• XML based scheme to convey metadata (sample rate, RF, IF) and binary

format

• Normative reference (C++) library developed as open source project
• n GitHub and tested with many well-known front-ends and data

collection systems

• Also available from the sdr.ion.org webpage

Use cases

• ESA AO9413 (May 2018) “Blind GNSS software receiver tool for field

test assessment in harsh environments” explicitly requiring the raw data tagged with the ION Metadata standard

• Application in Fraunhofer IIS Projects
• Flexiband/GTEC USB3.0 Front-end: Recording multiplexed IF data
• MGSE: Record/Replay-System: Replay multiplexed IF data
• Interference Analyzer-tool: Visulaization of raw data files
• PROOF/PRISMA#2 PRS Rx: raw data snapshots with the Metadata info
• Server-Based “Sample & Processing” PRS-Receiver: Raw data snapshots

tagged with the Metadata for PRS processing

Request for comments 1 (RFC1) period

• Comments available within the period 15/09/2017 – 31/12/2017
• A total of 33 comments were submitted
• available for the public in the sdr.ion.org/RFC1_Comments_Responses.html

Activities performed in 2018

• Document updated and checked for consistency with C++ code
• New features added in the document
• Updates based on the RFC1 and testing output
• GitHub project cleaned up and further testing/consolidation of the

C++ code

• Incorporation of new features of the standard in the C++ code, such as, MS

and MSA coding schemes

• Collection of more data sets and successful testing with the C++ code
• 13 test cases (permission for 12 to include in the repository)
• Test cases for GPS, GALILEO, Beidou, and GLONASS

Activities performed in 2018

• All publications and presentations uploaded to the webpage
• All modifications done in the standard available
• Request for public comments 2 already in progress
• Until November 30th, 2018

Public comment period 2

• ION accepting comments on the standard through November 30th,

2018

• Comments can be done through the sdr.ion.org/public-comment.html
• Standard document and normative software
• Two branches in the Github repository
• Master branch of the standard document & reference implementation will

remain frozen

• Devel branch will be modified with the updates during the RFC2 -> used for

pull requests for the normative software

Way Forward

• Public Comment Period for rev. 2
• Open till: Nov. 30th, 2018
• Get more vendors to support standard
• Revisions based on the public comments of the RFC2
• Update of the XML schema definition(.xsd) file

Way Forward

• March 2019: Present draft standard to ION Council for review and

approval

• ION legal review
• Sept. 2019: Adoption as formal ION Standard rev. 1.0

WG Meeting

• Working group meeting in this same room after this session
• Everyone is welcome to attend the meeting and suggest ideas or

make comments

Working Group Meeting

Minutes of Meeting

Minutes of Meeting

• The meeting of the working started immediately after session F2. The attendee list is shown in the last slide of this presentation.
• Minutes and attendee list were taken by T. Pany .
• A. Rügamer gave a short presentation on particular use cases of the standard (presentation available on sdr.ion.org)
• S. Gunawardena presented selected topics of the RFC1 and asked for agreement of the selected motions. Agreement was achieved.
• The group agrees that the normative reference software written in C++ is mainly intended to demonstrate correct use of the standard and

that the software is not necessarily efficiently programmed which can be an issue on embedded systems.

• CTTC expressed willingness to package the normative reference software as a package for Linux distributions and to support it within GNSS-

SDR.

• S. Gunawardena explains the upcoming procedure. After RFC2 the larger WG needs to accept the standard by a majority vote with no

minimum required participation. This vote is the last occasion to change the standard. The legal review will confirm the objectiveness when creating the standard.

• Publications related to the standard have been identified that have not yet been uploaded to sdr.ion.org. T. Pany took the action to take

care of this.

List of attendees

Name Organisation Email Markel Arizabaleta UniBw markel.arizabaleta@unibw.de Thomas Pany UniBw thomas.pany@unibw.de Javier Arribas CTTC jarribas@cttc.es Carles Fernández-Prades CTTC cfernandez@cttc.es Phillipp Berglez TCA pberglez@tca.at Cillian O’Driscoll Consultant cillian@codc.ie Zhen Zhu ECU zhuz@ecu.edu Laurent Lestarquit CNES laurant.lestarquit@cnes.fr Fabio Dovis Politecnico di Torino fabio.dovis@polito.it Nicola Linty Politecnico di Torino nicola.linty@polito.it Marc Majoral CTTC mmajoral@cttc.es Nabuaki Kubo

• nkubo@kaiyodai.ac.jp

Mark Carrol AFRL mark.carroll.10@us.af.mil Eric Vinande AFRL/RYWN Eric.vinande@us.af.mil Jason Pontious Riverside Research jpontious@riversideresearch.org Sanjeev Gunawardena AFIT sanjeevg2@gmail.com