mirror of
https://github.com/acamarata/pray-calc-ml.git
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c1eeef53c4
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
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1.7 KiB
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30 lines
1.7 KiB
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To: bosscha@itb.ac.id
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Subject: Request for Per-Night Twilight Observation Data — Open-Source Prayer Time Research
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Assalamu alaykum wa rahmatullahi wa barakatuh,
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My name is Ali Camarata. I am an independent researcher building an open-source dataset of verified Fajr and Isha twilight observations for data-driven Islamic prayer time calculation.
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I have been studying the excellent work of Prof. Dani Herdiwijaya and colleagues at Bosscha Observatory, including:
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- Herdiwijaya (2016), J. Phys.: Conf. Ser. 771, 012033 (5 Indonesian stations)
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- Herdiwijaya (2020), J. Phys.: Conf. Ser. 1523, 012007 (multi-station comparison)
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- Herdiwijaya (2015), ICOPIA proceedings (Bosscha, Bandung, Cimahi, Yogyakarta, Amfoang)
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These papers report aggregate mean depression angles across hundreds of observation nights, but the per-night data (specific dates with specific observed Fajr/Isha times) would be far more valuable for building predictive models.
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Would it be possible to obtain the raw per-night observation logs from any of Bosscha's twilight monitoring campaigns? Even a subset of the data (e.g., the 136 clear nights from the Yogyakarta 2014-2016 campaign, or the Kupang Amfoang measurements) would be a significant contribution.
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The data I need for each observation night:
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- Calendar date
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- Local observed time of Fajr onset (morning twilight detection)
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- Local observed time of Isha onset (evening twilight disappearance), if recorded
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- Any sky condition notes
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Our project: https://github.com/acamarata/pray-calc-ml
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Current dataset: 4,200+ verified observations from 140+ sites across 20+ countries.
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I would be pleased to share our compiled dataset and acknowledge Bosscha Observatory's contribution in all publications.
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Jazakallahu khairan,
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Ali Camarata
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alisalaah@gmail.com
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