pray-calc-ml/research/outreach/12_diyanet_turkey.txt
Aric Camarata c1eeef53c4 Expand dataset to 5,871 Fajr / 46 Isha across 114 locations
Major additions:
- Extract all 1,621 Basthoni 2022 SQM records (46 Indonesian sites,
  Lampiran 2-5) via precomputed_angles.py
- Add 9 new raw sighting CSVs: Abdel-Hadi Malaysia, BRIN multistation,
  Kassim Bahali (2017+2019), Khalifa Saudi, Moonsighting.com,
  Shaukat 2015 Blackburn UK, Walisongo Sulawesi
- Curate aggregate D0 database (115 entries) in research/

Pipeline improvements:
- Open-Topo-Data SRTM30m primary elevation API with fallback
- APPROVED_RAW_CSVS allowlist prevents circular data ingestion
- Pre-computed angle merge path (bypasses back-calculation for SQM data)
- BAD_NOTE_MARKERS quality filter for excluded sources

Collection tools:
- BRIN multistation SQM processors
- PDF/HTML table extractor for academic papers
- Source tracking database (collection_manifest.json)

Documentation:
- Rewrite .wiki/Data.md and .wiki/Research.md from scratch
- Expand Data-Sources.md with full Basthoni Lampiran breakdown
- Add 14 researcher outreach drafts
- Update .gitignore to exclude bulk/experimental files
2026-02-28 10:51:01 -05:00

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To: bilgi@diyanet.gov.tr (Diyanet Isleri Baskanligi)
Subject: Request for Historical Twilight Observation Records from Diyanet Research (2012-2015 Ankara Campaign)
Assalamu alaykum wa rahmatullahi wa barakatuh,
My name is Ali Camarata. I am an independent researcher building an open-source dataset of verified Fajr and Isha twilight observations for empirical Islamic prayer time modeling.
I understand that Diyanet conducted twilight observation research in Ankara during approximately 2012-2015, informing Turkey's prayer time methodology. If per-night observation records exist from this campaign (or any other Diyanet twilight observation program), they would be extremely valuable for our global dataset.
For each observation night, I need:
- Calendar date
- City or observation site
- Locally observed time of Fajr onset
- Locally observed time of Isha end (if recorded)
- Sky conditions or observation method
Our project: https://github.com/acamarata/pray-calc-ml
Current dataset: 4,200+ verified Fajr observations from 140+ sites across 20+ countries.
Turkey's latitude (approximately 37-42N) is underrepresented in our dataset, and Diyanet's observations would help calibrate models for the Mediterranean and Central Asian latitude band.
Full attribution to Diyanet in our open-source repository.
Jazakallahu khairan,
Ali Camarata
alisalaah@gmail.com