Source - SouthPAN
Scope of this note
This note is the knowledge base’s institutional source anchor for SouthPAN (Southern Positioning Augmentation Network), the Australia–New Zealand SBAS capability.
Boundary:
- This note anchors official open-service and service-definition claims only.
- It does not verify aviation Safety-of-Life certification, LPV procedure publication, aircraft operational approval, or airport-specific minima.
- Performance values below are quoted only in the context of SouthPAN early Open Services, not certified aviation Safety-of-Life service.
- Operational aviation claims must wait for the applicable certified Safety-of-Life service definition, regulator material, AIP/procedure sources, and operator/aircraft approval context.
Primary official sources extracted
SouthPAN Service Definition Document for Signal-In-Space Open Services
|| Field | Signal | ||---|---| || Issuing program | SouthPAN | || Document code | SBAS-STN-0001 | || Revision | 03 | || Effective date | 14 February 2024 | || Classification | OFFICIAL (AU) / UNCLASSIFIED (NZ) | || Source owner | Geoscience Australia / Toitū Te Whenua Land Information New Zealand | || Scope | Signal-In-Space Open Services, system architecture, RF signal characteristics, navigation message structures, indicative Open Service performance |
SouthPAN early Open Services factsheet
|| Field | Signal | ||---|---| || Issuing body | Geoscience Australia | || Scope | Factsheet for GNSS users accessing SouthPAN early Open Services | || Status signal | Early Open Services available since September 2022 | || Aviation signal | Certified Safety-of-Life Service planned for 2028 |
SouthPAN FAQ
|| Field | Signal | ||---|---| || Issuing body | Geoscience Australia | || Page updated | 28 November 2023 | || Scope | SouthPAN service overview, available services, PRN code, delivery organizations, user compatibility |
Verified service identity
|| Field | Verified signal | ||---|---| || System | Southern Positioning Augmentation Network (SouthPAN) | || Providers | Geoscience Australia and Toitū Te Whenua Land Information New Zealand | || Operating/delivery organizations | Lockheed Martin Australia, GMV, Inmarsat Australia (delivery role per FAQ signal) | || Service model | Free and open-access early Open Services | || Early Open Services start | September 2022 | || Full Operating Capability target | 2028 | || Safety-of-Life aviation service | Planned/certified aviation service target in 2028; not yet available as certified aviation service in the extracted sources | || PRN code | 122 |
Verified service types
|| Service | Signal | Current boundary | ||---|---|---| || L1 SBAS Open Service (OS-L1) | Augments GPS L1 C/A; uses L1 frequency 1,575.42 MHz | Open Service, not Safety-of-Life during early service phase | || DFMC SBAS Open Service (OS-DFMC) | Augments GPS L1 C/A, GPS L5, Galileo E1, Galileo E5a; signal on L5 | Open Service, next-generation DFMC context; not a certified aviation claim by itself | || PPP via SouthPAN (OS-PVS) | PPP corrections for GPS/Galileo; more accurate than OS-DFMC; delivered via L5 and internet | Open Service, not SBAS aviation Safety-of-Life operation | || Data Access Services | Same navigation messages delivered through internet instead of satellite broadcast | Data channel; not itself a satellite-broadcast aviation authorization |
Verified coverage signals
|| Service | Coverage signal from official material | ||---|---| || OS-L1 | Mainland Australia and New Zealand | || OS-DFMC | Australia and New Zealand Exclusive Economic Zones (EEZs) | || OS-PVS | Australia and New Zealand Exclusive Economic Zones (EEZs) |
Coverage depends on satellite visibility, receiver environment, user equipment, and service area. Internet-delivered corrections may be technically accessible outside the region, but the correction data is relevant to the defined SouthPAN service area.
Verified early Open Service performance signals
These values are for SouthPAN early Open Services only. They must not be reused as aviation Safety-of-Life performance commitments.
|| Service | Horizontal signal | Vertical signal | Notes | ||---|---|---|---| || L1 SBAS Open Service | better than or equal to 3 m, 95% confidence interval | better than or equal to 4 m, 95% confidence interval | Open Service factsheet | || DFMC SBAS Open Service | better than or equal to 1.5 m, 95% confidence interval | better than or equal to 2.5 m, 95% confidence interval | Open Service factsheet | || PVS Open Service | better than or equal to 0.40 m, 95% confidence interval | better than or equal to 0.55 m, 95% confidence interval | After convergence; convergence better than 80 minutes during early Open Service |
Verified signal and message characteristics
- SouthPAN early Open Services are broadcast from the Inmarsat 4F2 geostationary satellite at 143.5° East longitude.
- PRN code: 122.
- L1 frequency: 1,575.42 MHz.
- L5 frequency: 1,176.45 MHz.
- L1 SBAS navigation message includes Message Type 0 (
Do not use for safety applications) during the early Open Service phase. - Service Provider ID bits of Message Type 17 are set to 8 to indicate SouthPAN navigation messages.
- SouthPAN transmits Message Type 27 (
SBAS Service Message). - SouthPAN does not expect to transmit Message Type 28 (
Clock-Ephemeris Covariance Matrix Message) in the near term, per the extracted factsheet signal.
Verified limitation signal
The Signal-In-Space Open Services service-definition document explicitly flags atmospheric/ionospheric activity north of 20°S as a limitation for maintaining lock on GNSS space vehicles and for large localized gradients, especially relevant to single-frequency and Safety-of-Life services.
This signal is important for ASEAN analysis because it reinforces that low-latitude ionospheric behavior is not a generic footnote; it is an explicit service-definition limitation in a regional SBAS system operating near the Asia-Pacific equatorial anomaly environment.
What this source can currently anchor
- SouthPAN identity, providers, and public service scope
- Early Open Services start date and FOC target
- Service families: L1 SBAS, DFMC SBAS, PVS, Data Access Services
- Early Open Service coverage areas and open-service performance targets
- PRN 122 and Inmarsat 4F2 at 143.5° East as broadcast signal context
- Explicit non-Safety-of-Life boundary for early Open Service use
- Ionospheric limitation statement north of 20°S
What this source must not be used for yet
Do not use this note alone to publish:
- certified aviation Safety-of-Life operational availability
- LPV procedure availability or minima in Australia or New Zealand
- aircraft eligibility, operator authorization, or regulator approval
- comparisons with WAAS/EGNOS/GAGAN on certified aviation performance
- ASEAN adoption feasibility claims without additional ASEAN-region evidence
Relationship to other source notes
|| Source note | Relationship | ||---|---| || Source - SBAS Service Providers | Family-level service-provider source anchor | || Source - ICAO Annex 10 Volume I GNSS SBAS | SARPs/source-family routing for SBAS system-level requirements | || Source - ICAO Doc 9849 | GNSS implementation guidance context, including DFMC and vulnerability topics | || Source - ICAO APAC GBAS-SBAS Implementation Forums | Regional Asia-Pacific coordination context | || SBAS Standards Source Matrix | Claim-routing matrix for separating Open Service, Safety-of-Life, equipment, procedure, and operational claims |