This WIP delivers a technical report with the intent of leveraging existing specifications and reports for V2X positioning enhancements, e.g.SAE6857 Requirements for a Terrestrial Based Positioning, Navigation, and Timing (PNT) System. Specifically, this WIP will extend beyond the existing GNSS requirements with additional complimentary positioning and augmentation capability requirements. This work will study the enhancement of the existing specifications in J2945/x and other ITS/V2X standards.
The first step in this work will be to survey similar work within SAE and/or other standards development organizations to adopt and collaborate with their efforts.
Rationale: To mitigate issues associated with relying solely on GNSS given critical requirements and J2945 series of standards lacking any concrete recommendations for positioning other than GPS/GNSS. Some common examples:
* Illegal, but widespread, GNSS jamming and spoofing devices.
* Satellite outages and atmospheric phenomena that lead to degradation of GNSS performance.
* Satellite geometry leads to reduced accuracy in the vertical dimension.
* Multipath GNSS signal propagation in indoor, urban and dense urban environments lead to position errors and/or availability issues.