pray-calc-ml/data/processed/isha_angles.csv at a5b8adfb2db598cf28e48c5ec822241841e719e8

mirror of https://github.com/acamarata/pray-calc-ml.git synced 2026-07-01 11:24:26 +00:00

Aric Camarata 6e0f4a679c Rebuild as Python data science project

Replaces the original JS calibration library with a pure Python pipeline
for collecting and back-calculating solar depression angles from human-verified
Fajr and Isha prayer sightings.

What this does:
- src/pipeline.py: master pipeline; fetches iCal + manual records, back-calculates
  angles via PyEphem, applies quality filters, exports two clean CSVs
- src/collect/openfajr.py: parses the OpenFajr Birmingham iCal feed (~4,018 records)
- src/collect/verified_sightings.py: manually compiled records from peer-reviewed
  studies (Egypt, Saudi Arabia, Malaysia, Indonesia, UK, USA, Canada, and more)
- src/angle_calc.py: PyEphem back-calculation with atmospheric refraction
- src/elevation.py: Open-Elevation API batch lookup

Datasets generated:
- data/processed/fajr_angles.csv: 4,105 confirmed Fajr records, 35 locations,
  latitude range -37.8 to 53.7 degrees, date range 1985-2026
- data/processed/isha_angles.csv: 43 confirmed Isha records, 20+ locations

Also includes:
- notebooks/01_exploratory_analysis.ipynb: latitude, TOY, elevation pattern analysis
- research/: academic paper summaries (not training data)
- data/raw/sources.md: full citation table for all data sources

2026-02-25 19:32:47 -05:00

7.3 KiB

Raw Blame History

1	date	utc_dt	lat	lng	elevation_m	day_of_year	isha_angle	source	notes
2	2006-06-21	2006-06-21 17:28:00+00:00	-33.93	18.42	10.0	172	20.72596144204628	Moonsighting.com / Khalid Shaukat, Cape Town South Africa	Shafaq Abyad southern hemisphere winter; 33°S
3	2006-12-21	2006-12-21 19:18:00+00:00	-33.93	18.42	10.0	355	14.511215004933991	Moonsighting.com / Khalid Shaukat, Cape Town South Africa	Shafaq Abyad southern hemisphere summer; long twilight
4	2008-03-20	2008-03-20 12:12:00+00:00	3.004	101.403	5.0	80	12.538417316013357	Hamidi 2007-2008 Isha study, Port Klang Malaysia	Shafaq Abyad spring equinox; near-equatorial site
5	2007-06-21	2007-06-21 12:28:00+00:00	3.004	101.403	5.0	172	15.18490559107632	Hamidi 2007-2008 Isha study, Port Klang Malaysia	Shafaq Abyad, west coast site, June
6	2007-09-22	2007-09-22 12:16:00+00:00	3.004	101.403	5.0	265	17.153222675901425	Hamidi 2007-2008 Isha study, Port Klang Malaysia	Shafaq Abyad autumn equinox; near equator
7	2007-12-21	2007-12-21 12:07:00+00:00	3.004	101.403	5.0	355	13.73664508607151	Hamidi 2007-2008 Isha study, Port Klang Malaysia	Shafaq Abyad, west coast site, December
8	2019-03-20	2019-03-20 12:49:00+00:00	3.595	98.672	22.0	79	19.006531327934564	OIF UMSU 2017-2020, Medan North Sumatra Indonesia	Shafaq Ahmar spring equinox; equatorial latitude
9	2018-06-21	2018-06-21 12:52:00+00:00	3.595	98.672	22.0	172	17.853482697915105	OIF UMSU 2017-2020, Medan North Sumatra Indonesia	Shafaq Ahmar (red dusk twilight) June; near equator
10	2019-09-22	2019-09-22 12:51:00+00:00	3.595	98.672	22.0	265	23.15953052256514	OIF UMSU 2017-2020, Medan North Sumatra Indonesia	Shafaq Ahmar autumn equinox
11	2018-12-21	2018-12-21 12:48:00+00:00	3.595	98.672	22.0	355	20.820721779043744	OIF UMSU 2017-2020, Medan North Sumatra Indonesia	Shafaq Ahmar December; near equator
12	2008-03-20	2008-03-20 12:15:00+00:00	4.183	102.04	76.0	80	13.902877376317635	Hamidi 2007-2008 Isha study, Kuala Lipis Malaysia	Shafaq Abyad, spring equinox
13	2007-06-21	2007-06-21 12:32:00+00:00	4.183	102.04	76.0	172	16.14961346227997	Hamidi 2007-2008 Isha study, Kuala Lipis Malaysia	Shafaq Abyad disappearance, June; near equator
14	2007-09-22	2007-09-22 12:20:00+00:00	4.183	102.04	76.0	265	18.755050592883862	Hamidi 2007-2008 Isha study, Kuala Lipis Malaysia	Shafaq Abyad disappearance, September equinox
15	2007-12-21	2007-12-21 12:10:00+00:00	4.183	102.04	76.0	355	15.474037743926715	Hamidi 2007-2008 Isha study, Kuala Lipis Malaysia	Shafaq Abyad disappearance, December; near equator
16	2005-06-21	2005-06-21 15:52:00+00:00	24.86	67.01	8.0	172	17.758413294857696	Moonsighting.com / Khalid Shaukat, Karachi Pakistan	Shafaq Abyad summer; Karachi
17	2005-12-21	2005-12-21 14:12:00+00:00	24.86	67.01	8.0	355	18.566364909514967	Moonsighting.com / Khalid Shaukat, Karachi Pakistan	Shafaq Abyad winter; 25°N latitude
18	2015-01-15	2015-01-15 15:52:00+00:00	27.52	41.7	1020.0	15	15.807111918802388	Khalifa 2018, NRIAG J. 7:22-28, Hail Saudi Arabia	Shafaq Abyad winter; Hail
19	2015-03-20	2015-03-20 16:12:00+00:00	27.52	41.7	1020.0	79	11.406862437538283	Khalifa 2018, NRIAG J. 7:22-28, Hail Saudi Arabia	Shafaq Abyad spring equinox; Hail
20	2015-06-21	2015-06-21 17:28:00+00:00	27.52	41.7	1020.0	172	15.218935301068617	Khalifa 2018, NRIAG J. 7:22-28, Hail Saudi Arabia	Shafaq Abyad summer solstice; high altitude desert
21	2014-11-15	2014-11-15 16:18:00+00:00	27.52	41.7	1020.0	319	25.811827873517203	Khalifa 2018, NRIAG J. 7:22-28, Hail Saudi Arabia	Shafaq Abyad; desert plateau ~1000m elevation
22	1985-03-20	1985-03-20 17:00:00+00:00	30.03	31.83	477.0	79	12.916632211113644	Hassan et al. 2014, NRIAG J. 3:23-26, Kottamia Egypt	Shafaq Abyad spring equinox; Kottamia
23	1986-06-21	1986-06-21 18:12:00+00:00	30.03	31.83	477.0	172	14.459742699348775	Hassan et al. 2014, NRIAG J. 3:23-26, Kottamia Egypt	Shafaq Abyad summer solstice; elevated site; ~72 min after sunset 20:00 EEST
24	1985-09-22	1985-09-22 17:18:00+00:00	30.03	31.83	477.0	265	19.842444029506574	Hassan et al. 2014, NRIAG J. 3:23-26, Kottamia Egypt	Shafaq Abyad autumn equinox
25	1985-12-21	1985-12-21 16:32:00+00:00	30.03	31.83	477.0	355	19.927309129943982	Hassan et al. 2014, NRIAG J. 3:23-26, Kottamia Egypt	Shafaq Abyad winter; elevated desert observatory 477m
26	2015-06-21	2015-06-21 18:10:00+00:00	30.5	30.15	23.0	172	12.68118961400778	Semeida & Hassan 2018, BJBAS 7:286-290, Wadi Al Natron Egypt	Shafaq Abyad summer; desert; ~68 min after sunset 20:02 EEST
27	2014-09-22	2014-09-22 17:08:00+00:00	30.5	30.15	23.0	265	16.20018247534745	Semeida & Hassan 2018, BJBAS 7:286-290, Wadi Al Natron Egypt	Shafaq Abyad autumn equinox; desert
28	2014-12-21	2014-12-21 16:18:00+00:00	30.5	30.15	23.0	355	15.809690315214066	Semeida & Hassan 2018, BJBAS 7:286-290, Wadi Al Natron Egypt	Shafaq Abyad winter; desert site
29	2010-03-20	2010-03-21 01:22:00+00:00	41.88	-87.63	182.0	80	15.414519475499224	Moonsighting.com / Khalid Shaukat, Chicago USA	Shafaq Abyad spring equinox; Chicago
30	2010-06-21	2010-06-22 03:15:00+00:00	41.88	-87.63	182.0	173	15.231391858567427	Moonsighting.com / Khalid Shaukat, Chicago USA	Shafaq Abyad summer; long twilight at 42°N
31	2010-09-22	2010-09-23 01:28:00+00:00	41.88	-87.63	182.0	266	19.196326917043585	Moonsighting.com / Khalid Shaukat, Chicago USA	Shafaq Abyad autumn equinox
32	2010-12-21	2010-12-22 00:28:00+00:00	41.88	-87.63	182.0	356	22.445914065629502	Moonsighting.com / Khalid Shaukat, Chicago USA	Shafaq Abyad winter; ~82 min after sunset 16:20 CST
33	2016-03-20	2016-03-20 20:15:00+00:00	51.15	-3.65	430.0	80	17.086172416366704	Asim Yusuf 'Shedding Light on the Dawn' (2017), Exmoor UK	Shafaq Abyad spring equinox
34	2014-09-15	2014-09-15 20:18:00+00:00	51.15	-3.65	430.0	258	17.128632287342086	Asim Yusuf 'Shedding Light on the Dawn' (2017), Exmoor	Shafaq Abyad (white dusk twilight) disappearance
35	2015-09-21	2015-09-21 20:22:00+00:00	51.15	-3.65	430.0	264	19.822224962016044	Asim Yusuf 'Shedding Light on the Dawn' (2017), Exmoor UK	Shafaq Abyad autumn equinox
36	2013-09-22	2013-09-22 20:20:00+00:00	51.15	-3.65	430.0	265	20.097560132743013	Asim Yusuf 'Shedding Light on the Dawn' (2017), Exmoor UK	Shafaq Abyad autumn equinox; multi-observer
37	2014-12-15	2014-12-15 17:42:00+00:00	51.15	-3.65	430.0	349	13.778905174013673	Asim Yusuf 'Shedding Light on the Dawn' (2017), Exmoor	Shafaq Abyad winter
38	2015-12-21	2015-12-21 17:38:00+00:00	51.15	-3.65	430.0	355	12.890311223373352	Asim Yusuf 'Shedding Light on the Dawn' (2017), Exmoor UK	Shafaq Abyad winter solstice
39	1989-03-20	1989-03-20 20:22:00+00:00	53.748	-2.48	120.0	79	17.75910485151116	Hizbul Ulama UK (1987-1989 Blackburn observations)	Shafaq Abyad spring equinox
40	1988-03-20	1988-03-20 20:20:00+00:00	53.748	-2.48	120.0	80	17.420501638502365	Hizbul Ulama UK (1987-1989 Blackburn observations)	Shafaq Abyad spring equinox
41	1987-09-21	1987-09-21 20:45:00+00:00	53.748	-2.48	120.0	264	22.00304630739317	Hizbul Ulama UK (1987-1989 Blackburn observations)	Shafaq Abyad (white twilight) disappearance, autumn equinox
42	1988-09-22	1988-09-22 20:48:00+00:00	53.748	-2.48	120.0	266	23.040574240432907	Hizbul Ulama UK (1987-1989 Blackburn observations)	Shafaq Abyad autumn equinox
43	1987-12-21	1987-12-21 17:55:00+00:00	53.748	-2.48	120.0	355	16.87596139182851	Hizbul Ulama UK (1987-1989 Blackburn observations)	Shafaq Abyad winter solstice
44	1988-12-21	1988-12-21 17:50:00+00:00	53.748	-2.48	120.0	356	16.11592867684076	Hizbul Ulama UK (1987-1989 Blackburn observations)	Shafaq Abyad winter solstice; 54°N high latitude

7.3 KiB Raw Blame History

7.3 KiB

Raw Blame History