Source - GNSS Radio Occultation Technique
Scope of this note
This is a starter source scaffold for GNSS Radio Occultation as an ionospheric observational technique.
Boundary:
- It is not a completed literature review.
- It does not verify the accuracy, calibration, or operational readiness of any specific RO constellation.
- It exists to anchor technique claims in the vault to identifiable datasets and literature.
Why this source note matters
The vault contains empirical ionospheric analysis derived from GNSS-RO data. Without a technique-level source scaffold, it is unclear which data products, constellations, and processing pipelines support the claims.
Current in-vault references supported by this scaffold
- GNSS Radio Occultation — technique definition
- Source - GNSS-RO Indonesia Empirical Study — specific application
- IRI-2020 vs GNSS-RO Indonesia — validation comparison
- ASEAN SBAS Deployment Barriers — ionospheric barrier framing
Current provisional usage in the vault
At present, this scaffold supports only the statement that:
- GNSS Radio Occultation provides an independent empirical measurement of ionospheric TEC from low-Earth-orbiting satellites
- Spire/COSMIC-2 podTec data from UCAR CDAAC was used for the Indonesian empirical study
- RO-based TEC is a threat-discovery proxy, not a certified SBAS correction source
It does not yet support:
- Any claim that RO TEC is interchangeable with ground GNSS IPP TEC
- Any quantified accuracy specification for Spire podTec vs other datasets
- Any operational readiness assessment for RO-based SBAS service
Immediate audit questions
- Which Spire data product version was used (Level 1, 2, or higher)?
- What is the published calibration accuracy of podTec versus ground-truth TEC?
- How do UCAR CDAAC quality-control flags affect the usable profile count?
- What is the spatial footprint of a single RO tangent point relative to SBAS grid cell size?
Suggested downstream cleanup targets
If this scaffold becomes source-backed, revisit and tighten claims in:
- GNSS Radio Occultation
- Source - GNSS-RO Indonesia Empirical Study
- SBAS Ionospheric Threat — Empirical Evidence
- ASEAN SBAS Deployment Barriers
Extraction template for next cycle
- Verified dataset/product name and version
- Constellation and instrument specifications
- Data provider and access path
- Published accuracy/bias specifications
- Quality-control flag definitions
- Relationship between RO TEC geometry and SBAS IPP geometry