Research Log - GNSS-RO Indonesia Merge

Merge Summary

Merged the GNSS-RO Indonesia empirical research vault into the main SBAS knowledge base.

Merge scope

• Source vault: private GNSS-RO research notes (6 markdown notes + 1 project summary)
• Target vault: retired SBAS vault
• Merge date: 2026-04-30
• Performed by: Hermes Agent with obsidian-knowledge-management skill

Non-overlap verification

The following domains were verified as non-overlapping before merge:

Domain	In SBAS vault before merge	In GNSS-RO vault
GNSS Radio Occultation technique	Not present	Full coverage
Total Electron Content (TEC)	Mentioned in integrity context only; no detailed concept note	Full empirical statistics
IRI-2020 model	Not present	Systematic validation
Ionospheric model validation	Conceptual only (standards/regulation)	Empirical methodology + results
Indonesia equatorial ionosphere	Only starter scaffold; zero empirical data	301-occultation study + 4 ION paper iterations
SBAS ionospheric threat	Conceptual only	Pre-operational threat budget with numbers

Verdict: zero content overlap confirmed.

Files created

Concepts (3 new atomic notes)

1. Concepts/GNSS Radio Occultation.md — technique definition with SBAS-context boundary
2. Concepts/Total Electron Content (TEC).md — observable concept with delay conversion table
3. Concepts/Ionospheric Model Validation.md — methodology concept with error metrics

Sources (3 new source scaffolds)

4. Sources/Source - GNSS Radio Occultation Technique.md
5. Sources/Source - IRI-2020 Ionosphere Model.md
6. Sources/Source - GNSS-RO Indonesia Empirical Study.md

Syntheses (3 new synthesis notes)

7. Syntheses/IRI-2020 vs GNSS-RO Indonesia.md — comparison with tables
8. Syntheses/SBAS Ionospheric Threat — Empirical Evidence.md — bridge to integrity design
9. Syntheses/Indonesian SBAS ION Paper Iterations.md — V1→V4 tracking note

Logs (1 new log)

10. Logs/ResearchLog-2026-04-30.md — this merge log

Existing files strengthened with bidirectional links

File	Links added
ASEAN/Countries/Indonesia.md	[[IRI-2020 vs GNSS-RO Indonesia]], [[SBAS Ionospheric Threat — Empirical Evidence]] (2 locations)
ASEAN/ASEAN SBAS Deployment Barriers.md	[[SBAS Ionospheric Threat — Empirical Evidence]], [[IRI-2020 vs GNSS-RO Indonesia]] (2 locations)
MOCs/SBAS-Research-MOC.md	Empirical research section, source scaffolds, priority area #6
MOCs/SBAS MOC.md	New concept links, suggested targets, see-also
Sources/SBAS Source Backlog.md	3 new execution-order entries, related notes
Sources/Source - Equatorial Ionosphere and SBAS Feasibility.md	Multiple links to empirical anchors

Connection health metrics

• New nodes created: 10 (3 concepts, 3 sources, 3 syntheses, 1 log)
• Bidirectional links per new node: 4–7 (within 3–5 target)
• Existing notes strengthened: 6
• Orphan nodes: 0
• Estimated path to any new topic from SBAS MOC: ≤3 steps

Provenance status of merged content

Note	Status	verification_status
Concepts (3)	Draft	empirical-study
Syntheses (3)	Draft	empirical-study
Sources (3)	Starter	metadata-pending
Log (1)	Complete	internal-backlog-only

Next steps identified

1. Deepen Source - GNSS-RO Indonesia Empirical Study with verified dataset metadata
2. Add ground GNSS CORS/IGS validation for Indonesian TEC
3. Targeted post-sunset GNSS-RO acquisition (18–21 LT gap)
4. Convert threat-budget scaffold into candidate GIVE-like bins after validation
5. Extend IGRF analysis to full-year or multi-year sampling

Merge checklist

• New terminology nodes created with full specifications
• Zero content overlap verified (file-system enforced, separate subdirectories)
• All nodes connected (3–5 bidirectional links each)
• Explicit uncertainty language in source scaffolds (metadata-pending)
• Recurring references converted into prioritized queue (source backlog updated)
• MOC navigation paths validated (≤3 steps to any topic from SBAS MOC)
• Version control via git-like file structure preserved
• Next source-building steps clearly identified
• Merge log created

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Protocol followed: obsidian-knowledge-management skill, Expansion Methodology + Provenance-First Quality Assurance