SBAS Knowledge Base

ResearchLog-2026-04-23

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Research Log - 2026-04-23

Cycle

  • Time: 2026-04-23 08:30 WIB
  • Classification: review, retrieval, MOC maintenance
  • Focus: initialize top-level SBAS navigation and identify provenance gaps

What changed

Files touched

  • MOCs/SBAS MOC.md
  • MOCs/SBAS-Research-MOC.md
  • MOCs/SBAS-in-Civil-Aviation-MOC.md

Sourced vs synthesized vs uncertain

  • Sourced this cycle: none added; this was a structure-and-provenance review cycle.
  • Synthesized this cycle: assessment that the vault has promising structure but weak source-note coverage.
  • Flagged as uncertain/provisional: unsourced quantitative performance figures, standards scope statements, and cross-region interoperability claims in existing draft notes.

Next best research question

Which foundational source note should be built first to stabilize the vault: an ICAO SBAS standards note, an RTCA airborne SBAS note, or an atomic concept note on SBAS Integrity and Protection Levels?

Follow-on cycle — 2026-04-23 08:33 WIB

  • Classification: provenance management, retrieval, source backlog creation
  • Improvement: created SBAS Source Backlog to convert recurring standards references into an explicit verification queue.
  • Why this was chosen: the vault repeatedly cites ICAO/RTCA/EUROCAE documents without dedicated source notes, making many technical and regulatory claims hard to audit.
  • New recommendation: build Source - RTCA DO-229 first, then use it to clean up airborne-equipment and operational-approval claims across the vault.

Follow-on cycle — 2026-04-23 09:18 WIB

  • Classification: Asia-Pacific comparison expansion, regional broadening, retrieval strengthening
  • Improvement 1: created MSAS vs GAGAN as the first Asia-focused regional comparison note using in-vault references only.
  • Improvement 2: created BDSBAS to extend Asia coverage beyond Japan and India into a China/BeiDou-centered regional context.
  • Improvement 3: updated SBAS-Systems-by-Region-MOC, SBAS MOC, and SBAS-vs-Other-Augmentation-Methods to surface the stronger Asia comparison layer.
  • Result: the vault now has an Asia-focused regional comparison path spanning MSAS, GAGAN, and BDSBAS, plus a dedicated MSAS vs GAGAN comparison note.

Follow-on cycle — 2026-04-23 14:30 WIB

Next best research question

Which ASEAN-facing source stack should be built first: ICAO APAC regional meeting/source notes, country-level PBN readiness notes, or an equatorial-ionosphere evidence note for Southeast Asian SBAS feasibility?

Follow-on cycle — 2026-04-23 14:48 WIB

  • Classification: regional continuation, country-layer expansion, retrieval strengthening
  • Focus: extend the ASEAN branch downward from heuristic grouping into dedicated country child notes without duplicating ASEAN-wide demand, barrier, governance, or service-model notes.
  • New notes created under ASEAN/Countries/:
  • Navigation updated in:
  • Sourced this cycle: none newly extracted into dedicated source notes; this was a structural expansion cycle built on the prior ASEAN heuristic layer.
  • Synthesized this cycle: each country now has a distinct child role in the ASEAN storyline, separated into archipelagic demand anchors, hub/connector states, lower-readiness mainland beneficiaries, and a compact fast-follower case.
  • Flagged as uncertain/provisional: country-level implementation posture, PBN maturity details, and any implicit ranking beyond the heuristic roles already stated.
  • Result: the ASEAN branch now has a full country-note layer, making it possible to continue next into source-backed national evidence without rewriting the regional notes.

Follow-on cycle — 2026-04-23 14:56 WIB

  • Classification: provenance continuation, ASEAN source-layer creation, governance verification support
  • Focus: add an ASEAN-specific source backbone so the new regional and country notes can later be tightened against identifiable source stacks.
  • New notes created:
  • Notes updated to surface the source layer:
  • Sourced this cycle: no direct quote extraction yet; created provenance scaffolds based on the previously identified ICAO APAC meeting/forum trail.
  • Synthesized this cycle: the most valuable first ASEAN-facing source stack is the ICAO APAC forum layer because it bears directly on the current governance hypothesis.
  • Flagged as uncertain/provisional: exact meeting metadata, the degree of ASEAN-specific participation, and whether APANPIRG/CNS material supports implementation planning versus only broad coordination.
  • Result: the ASEAN branch now has both a thematic layer and an explicit provenance queue, which is the right base for future source-backed country or governance upgrades.

Follow-on cycle — 2026-04-23 15:04 WIB

  • Classification: provenance continuation, source-stack expansion, barrier/governance support
  • Focus: expand the ASEAN provenance layer beyond the first ICAO APAC forum scaffold into adjacent regional planning and technical-feasibility source stacks.
  • New notes created:
  • Notes updated to surface the new source layer:
  • Sourced this cycle: no direct extraction yet; created two additional provenance scaffolds to distinguish governance-source support from technical-feasibility support.
  • Synthesized this cycle: the ASEAN branch now separates three evidence lanes clearly — ICAO APAC implementation forums, APANPIRG/CNS regional planning references, and equatorial-ionosphere feasibility evidence.
  • Flagged as uncertain/provisional: exact documentary support for APANPIRG/CNS SBAS planning language, and any technical conclusion about what equatorial conditions do or do not allow in Southeast Asian SBAS service design.
  • Result: the provenance layer is now deep enough to support a future source-backed tightening pass without collapsing back into generic ASEAN synthesis.

Follow-on cycle — 2026-04-23 15:12 WIB

  • Classification: provenance continuation, country-readiness support, archipelagic-demand support
  • Focus: extend the ASEAN source layer into the first two scaffolds needed to upgrade country notes from heuristic placeholders toward evidence-backed differentiation.
  • New notes created:
  • Notes updated to surface the new source layer:
  • Sourced this cycle: no direct extraction yet; created source scaffolds that separate country-readiness evidence from archipelagic-demand evidence.
  • Synthesized this cycle: the country branch can now be tightened along two distinct axes rather than one blended heuristic — readiness signals and airport-network/access context.
  • Flagged as uncertain/provisional: any claim that archipelagic demand implies early implementation, and any ranking of ASEAN states by readiness before country-specific documents are extracted.
  • Result: the ASEAN branch now has enough provenance structure to support the next real evidence pass on Indonesia, Philippines, Singapore, and ASEAN SBAS Readiness Heuristic.

Follow-on cycle — 2026-04-23 15:26 WIB

  • Classification: evidence-tightening, country-readiness refinement, cautious claim narrowing
  • Focus: use live institutional findings to tighten the highest-value ASEAN country notes without overstating unsupported conclusions.
  • Live evidence incorporated this cycle:
    • CAAS website signals for Singapore, including visible AIM-system support and current regulator planning/publication documents.
    • World Bank country-page support for Indonesia as an archipelagic case, including wording that the country is made up of over 17,000 islands.
    • a negative finding for Philippines: the source path was reached, but no equally clean institutional archipelagic sentence was extracted during this cycle.
  • Notes updated:
  • Sourced this cycle: limited but real live evidence, used only where the source support was clear enough.
  • Synthesized this cycle: the first country-tightening pass now differentiates between claims supported by direct institutional signals and claims that remain heuristic placeholders.
  • Flagged as uncertain/provisional: direct PBN depth for Singapore, airport-network metrics for Indonesia, and an institutional archipelagic citation strong enough to tighten the Philippines note beyond its current wording.
  • Result: the ASEAN branch now contains its first evidence-aware country refinements rather than only source scaffolds and heuristics.

Five-cycle continuation block — 2026-04-23 15:40 WIB

  • Classification: multi-cycle continuation, evidence tightening, country-readiness refinement, provenance synchronization
  • Scope: continue autonomously for five successive ASEAN-focused cycles without stopping.

Cycle 1

  • Attempted deeper extraction from Singapore CAAS-linked PDFs and recorded a precise limit: direct PDF text extraction remains incomplete in the current environment.
  • Preserved the stronger live evidence already available from the CAAS site itself rather than over-claiming from unread PDFs.

Cycle 2

  • Added live Malaysia readiness evidence through official CAAM pages.
  • Usable support captured for:
    • national/state safety-planning structures
    • AIS/AIP/AIRAC publication capability
    • visible official PBN circular links

Cycle 3

  • Added live Thailand readiness evidence through ICAO APAC PBN progress-report paths and a visible CAAT PBN guidance-material path.
  • Tightened Thailand only to the level of documented PBN-modernization activity, not SBAS adoption.

Cycle 4

  • Improved the Philippines evidence base through CAAP references to “CAAP-operated airports” and “all CAAP-operated airports,” strengthening the distributed-airport context.
  • Updated the Philippines note to reflect improved network-context support while keeping the archipelagic-demand claim cautious.

Cycle 5

  • Synchronized the branch by updating:

  • Result: the ASEAN branch now has a broader first-generation evidence-backed country layer spanning five states.

  • Sourced in this five-cycle block:

    • CAAS website institutional signals for Singapore
    • World Bank Indonesia country-page archipelagic wording
    • CAAP distributed-airport context wording for the Philippines
    • CAAM pages and PBN-related document paths for Malaysia
    • ICAO APAC / CAAT source paths for Thailand PBN progress and guidance material

  • Synthesized in this five-cycle block:

    • readiness and demand are now being separated more cleanly by evidence type rather than by intuition alone
    • some countries are better supported on institutional readiness, others on distributed-network demand

  • Flagged as uncertain/provisional:

    • direct SBAS adoption claims for all five countries
    • exact PBN implementation depth or procedure counts where underlying PDFs were not directly extracted
    • a stronger official archipelagic citation for the Philippines beyond the current CAAP-operated-airports context

  • Result: the vault has now moved from ASEAN branch creation into sustained evidence-aware refinement.

Three-cycle continuation block — 2026-04-23 15:55 WIB

  • Classification: multi-cycle continuation, targeted evidence tightening, branch synchronization
  • Scope: continue autonomously for three successive ASEAN-focused cycles without stopping.

Cycle 1

  • Strengthened the Philippines evidence base beyond generic CAAP-operated-airports wording.
  • Added a stronger live CAAP signal supporting 44 commercially operating airports under CAAP and 48 commercially operated airports nationwide.
  • Tightened the Philippines note toward a nationwide commercial-airport-network framing while keeping the broader archipelagic-demand claim cautious.

Cycle 2

  • Consolidated Malaysia and Thailand as evidence-aware readiness cases.
  • Malaysia remains supported by CAAM governance, AIS/AIP/AIRAC, and PBN circular signals.
  • Thailand remains supported by ICAO APAC PBN implementation-reporting paths and visible CAAT PBN guidance material.
  • Chose not to over-claim beyond those live source paths.

Cycle 3

  • Synchronized the branch by updating:

  • Result: the branch now distinguishes more clearly between evidence-backed readiness states and evidence-backed distributed-network demand states.

  • Sourced in this three-cycle block:

    • CAAP commercial-airport-network wording for the Philippines
    • previously captured CAAM and ICAO APAC / CAAT evidence retained and synchronized rather than re-expanded

  • Synthesized in this three-cycle block:

    • the Philippines is now better supported as a distributed commercial-airport-network case
    • the branch’s strongest current early split is now explicit: institutional-readiness signals for Singapore, Malaysia, and Thailand versus distributed-network demand/context signals for Indonesia and Philippines

  • Flagged as uncertain/provisional:

    • direct SBAS adoption claims for all five countries remain unsupported
    • Philippines still needs a cleaner official archipelagic citation beyond the current airport-network evidence
    • Malaysia and Thailand still need deeper primary-text extraction before stronger PBN-detail claims are made

  • Result: the ASEAN knowledge base is now materially more evidence-shaped and less heuristic than before this three-cycle block.

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