🛰️ SatelliteID Requirements in PIC2BIM iOS#
This document outlines which satellite signals are necessary for extracting and validating satelliteID in the PIC2BIM iOS application.
✅ Required Satellite Signals#
PIC2BIM iOS relies primarily on Galileo GNSS signals, specifically:
🛰️ Galileo E1B (Open Service - OS)#
- The E1B signal contains the Navigation Message Authentication (OSNMA) data.
satelliteIDis derived from the ephemeris and OSNMA fields within the navigation message.- Only satellites broadcasting E1B with OSNMA capability are used for secure authentication.
🔄 Signal Processing Flow#
- GNSS Receiver captures raw E1B signals.
- OSNMA Parser extracts
satelliteIDfrom navigation messages. - Authentication Validator checks signature integrity tied to
satelliteID. - Validated satelliteID is used in: - Metadata for photos - OSNMA logs - Reports
📌 Satellite System Compatibility#
| GNSS System | Signal Used | OSNMA Compatible | Usage in PIC2BIM |
|---|---|---|---|
| Galileo | E1B | ✅ Yes | ✅ Primary Source |
| GPS | L1 C/A | ❌ No | ❌ Not used |
| GLONASS | L1 | ❌ No | ❌ Not used |
| BeiDou | B1 | ❌ No | ❌ Not used |
🔒 Why Use Galileo E1B?#
- Authenticity: Ensures signal has not been spoofed.
- Trustable Positioning: Enables secure geotagging of media.
- Field Reliability: Enhances GNSS credibility in critical field operations.