Although all SBAS are regional systems, the need to establish adequate co-operation/coordination among SBAS providers is commonly recognized so that their implementation becomes more effective and part of a seamless world-wide navigation system. ICAO SARPs Annex 10 and Aviation Standards support interoperability among SBAS service providers by:
- Evaluating transitions between SBAS and RAIM along with transitions between two SBAS and between SBAS and GBAS.
- Established a work plan for development of a definition document to support a dual-frequency, multi- constellation user.
- Global coverage to be expanded with addition of GAGAN and SDCM.
- Availability of worldwide LPV-200 service expected with addition of a second frequency, extended networks and additional GNSS constellations.
SBAS IWG objectives established to support technical interoperability and cooperation:
Objective 1: Harmonize SBAS modernization plans.
Objective 2: Forum for discussion on SBAS standards.
Objective 3: Harmonize technical improvements for operation and user feedback.
Objective 4: Research and development cooperation on key SBAS technologies.
Objective 5: Support joint SBAS promotion.