pray-calc-ml/data/processed/isha_angles.csv at cc8d3c33d1ead842bad4fd59cd9561cb80bb5800

mirror of https://github.com/acamarata/pray-calc-ml.git synced 2026-07-01 03:14:27 +00:00

Aric Camarata cc8d3c33d1 Expand dataset to 4,396 Fajr / 70 Isha records across 80 locations

Added sources and sites:
- Mount Timau NTT (CC0 BRIN SQM dataset): 97 individual Fajr nights
  at two target angles (16.51° and 18.0°); pristine 21.86 mpsas site,
  1,600m; data.brin.go.id hdl:20.500.12690/RIN/A5XCJB
- Baharia (Bahariya) Oasis, Egypt: 4 seasonal records; Hassan 2014,
  NRIAG J. 3:23-26; naked-eye multi-site 1984-1987, mean 14.7°
- Labuan Bajo, Flores, NTT, Indonesia: 4 seasonal records; Maskufa
  2024, Mazahib 23(1):155-198; dark sky SQM 19.30°
- Bogor, West Java, Indonesia: 4 seasonal records; Maskufa 2024,
  Mazahib 23(1):155-198; urban SQM 13.58°
- Pekan, Pahang, Malaysia: 9 individual DSLR observations Jun-Jul 2017;
  Kassim Bahali 2018, Sains Malaysiana 47(11):2877-2885; Do range
  -15.45° to -18.06°
- Kuala Terengganu, Malaysia: 1 record; Kassim Bahali 2018 Fig 4,
  Do=-16°, time inferred via PyEphem
- Additional batch 3 aggregate sites: Tubruq Libya (3 subsets),
  Fayum Egypt, Biak Papua, Manado North Sulawesi, Lombok NTB,
  Makkah, Madinah, Karachi, Ankara, Marrakech, Kano, Johannesburg,
  Dhaka, Alexandria

Source correction: removed incorrect Setyanto 2021 Al-Hilal
attribution from Labuan Bajo and Bogor (that paper covers zodiac
light, not Fajr, at different Indonesian sites)

2026-02-25 20:44:37 -05:00

13 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	2019-03-21	2019-03-21 09:32:00+00:00	-31.25	149.267	590.0	80	17.478792180426545	LP2024 Scientific Reports PMC11535048, Coonabarabran NSW Australia	Pristine Isha; SH autumn equinox; time inferred
5	2019-06-22	2019-06-22 08:32:00+00:00	-31.25	149.267	590.0	173	17.39878505203631	LP2024 Scientific Reports PMC11535048, Coonabarabran NSW Australia	Pristine Isha; SH winter; short twilight at 31°S; time inferred
6	2019-09-23	2019-09-23 09:17:00+00:00	-31.25	149.267	590.0	266	17.3243513580088	LP2024 Scientific Reports PMC11535048, Coonabarabran NSW Australia	Pristine Isha; SH spring equinox; time inferred
7	2018-12-22	2018-12-22 10:42:00+00:00	-31.25	149.267	590.0	356	17.418973383675574	LP2024 Scientific Reports PMC11535048, Coonabarabran NSW Australia	Pristine Isha; SH summer; long twilight; time inferred
8	2015-03-21	2015-03-21 11:09:00+00:00	-10.2	123.6	50.0	80	18.761858583939073	Herdiwijaya 2020, J. Phys. Conf. 1523, Kupang NTT Indonesia dusk	Photometer dusk at -18.853°; NOTE: may measure end of astronomical twilight vs Shafaq Abyad; spring equinox; time inferred
9	2015-06-22	2015-06-22 10:52:00+00:00	-10.2	123.6	50.0	173	18.73244095918383	Herdiwijaya 2020, J. Phys. Conf. 1523, Kupang NTT Indonesia dusk	Photometer dusk at -18.853°; southern hemisphere winter; time inferred
10	2015-09-23	2015-09-23 10:54:00+00:00	-10.2	123.6	50.0	266	18.66171776542293	Herdiwijaya 2020, J. Phys. Conf. 1523, Kupang NTT Indonesia dusk	Photometer dusk at -18.853°; autumn equinox; time inferred
11	2015-12-22	2015-12-22 11:27:00+00:00	-10.2	123.6	50.0	356	18.776565688769402	Herdiwijaya 2020, J. Phys. Conf. 1523, Kupang NTT Indonesia dusk	Photometer dusk at -18.853°; southern hemisphere summer; time inferred
12	2008-01-15	2008-01-15 12:19:00+00:00	2.46	101.867	15.0	15	14.22435047488804	Abdel-Hadi & Hassan 2022, IJAA, Teluk Kemang Malaysia SQM dusk	SQM dusk; mean 14.38°; winter; time inferred
13	2008-04-15	2008-04-15 12:12:00+00:00	2.46	101.867	15.0	106	14.19409102931759	Abdel-Hadi & Hassan 2022, IJAA, Teluk Kemang Malaysia SQM dusk	SQM dusk; mean 14.38°; spring; time inferred
14	2007-05-15	2007-05-15 12:13:00+00:00	2.46	101.867	15.0	135	14.319810052501785	Abdel-Hadi & Hassan 2022, IJAA, Teluk Kemang Malaysia SQM dusk	SQM dusk; mean 14.38°; may measure different Shafaq threshold than 16-17° papers; time inferred
15	2007-09-22	2007-09-22 12:02:00+00:00	2.46	101.867	15.0	265	14.131031307805449	Abdel-Hadi & Hassan 2022, IJAA, Teluk Kemang Malaysia SQM dusk	SQM dusk; mean 14.38°; autumn equinox; time inferred
16	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
17	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
18	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
19	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
20	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
21	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
22	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
23	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
24	2008-01-15	2008-01-15 12:16:00+00:00	4.183	102.04	76.0	15	14.304896334449062	Abdel-Hadi & Hassan 2022, IJAA 12:7-29, Kuala Lipis Malaysia	Shafaq Abyad winter; Kuala Lipis; time inferred
25	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
26	2008-04-15	2008-04-15 12:13:00+00:00	4.183	102.04	76.0	106	14.273538935969533	Abdel-Hadi & Hassan 2022, IJAA 12:7-29, Kuala Lipis Malaysia	Shafaq Abyad spring; Kuala Lipis 76m; time inferred
27	2007-05-15	2007-05-15 12:15:00+00:00	4.183	102.04	76.0	135	14.34835938945879	Abdel-Hadi & Hassan 2022, IJAA 12:7-29, Kuala Lipis Malaysia	Shafaq Abyad end; 4.2°N 76m; Isha 14.38°; time inferred from mean angle
28	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
29	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
30	2007-09-22	2007-09-22 12:02:00+00:00	4.183	102.04	76.0	265	14.267391765716521	Abdel-Hadi & Hassan 2022, IJAA 12:7-29, Kuala Lipis Malaysia	Shafaq Abyad autumn equinox; Kuala Lipis; time inferred
31	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
32	2007-03-21	2007-03-21 11:35:00+00:00	5.933	116.05	5.0	80	17.857891585024348	Niri & Zainuddin, Isha prayer time determination, Tanjung Aru Sabah	SQM-LE; Shafaq Abyad disappearance; mean 17.99° depression; time inferred
33	2007-06-22	2007-06-22 11:47:00+00:00	5.933	116.05	5.0	173	17.787197419567423	Niri & Zainuddin, Isha prayer time determination, Tanjung Aru Sabah	SQM-LE; Shafaq Abyad; summer at near-equatorial site
34	2007-09-23	2007-09-23 11:20:00+00:00	5.933	116.05	5.0	266	17.83225788506929	Niri & Zainuddin, Isha prayer time determination, Tanjung Aru Sabah	SQM-LE; Shafaq Abyad; autumn equinox
35	2007-12-22	2007-12-22 11:22:00+00:00	5.933	116.05	5.0	356	17.890311077919815	Niri & Zainuddin, Isha prayer time determination, Tanjung Aru Sabah	SQM-LE; Shafaq Abyad; winter season
36	2018-03-20	2018-03-20 12:29:00+00:00	6.317	102.15	3.0	79	17.43206685631449	LP2024 Scientific Reports PMC11535048, Pantai Mek Mas Kelantan Malaysia	Pristine site Isha; 17.49° twilight stability; spring equinox; time inferred
37	2018-06-21	2018-06-21 12:41:00+00:00	6.317	102.15	3.0	172	17.288274298812794	LP2024 Scientific Reports PMC11535048, Pantai Mek Mas Kelantan Malaysia	Pristine site Isha; summer; 6.3°N; time inferred
38	2018-09-22	2018-09-22 12:14:00+00:00	6.317	102.15	3.0	265	17.337122104209435	LP2024 Scientific Reports PMC11535048, Pantai Mek Mas Kelantan Malaysia	Pristine site Isha; autumn equinox; time inferred
39	2018-12-21	2018-12-21 12:14:00+00:00	6.317	102.15	3.0	355	17.291959185870017	LP2024 Scientific Reports PMC11535048, Pantai Mek Mas Kelantan Malaysia	Pristine site Isha; winter solstice; time inferred
40	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
41	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
42	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
43	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
44	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
45	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
46	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
47	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
48	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
49	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
50	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
51	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
52	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
53	2015-03-20	2015-03-20 17:24:00+00:00	31.35	27.24	28.0	79	13.976231900456279	Hassan et al., Time verification twilight Matrouh Egypt (Isha/dusk)	Twilight end at Matrouh; spring equinox; Isha ~14°; time inferred
54	2015-09-22	2015-09-22 17:10:00+00:00	31.35	27.24	28.0	265	13.952188780804187	Hassan et al., Time verification twilight Matrouh Egypt (Isha/dusk)	Twilight end; autumn equinox; time inferred
55	2015-12-21	2015-12-21 16:19:00+00:00	31.35	27.24	28.0	355	13.94112558189606	Hassan et al., Time verification twilight Matrouh Egypt (Isha/dusk)	Twilight end; winter solstice; time inferred
56	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
57	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
58	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
59	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
60	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
61	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
62	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
63	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
64	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
65	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
66	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
67	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
68	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
69	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
70	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
71	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

13 KiB Raw Blame History

13 KiB

Raw Blame History