Help with math of latitude and differences of daylight

[CannaRed]

I have an app that helps me record all my grow information. I used it on another device and the latitude function would work by typing a location and it would compare to a list of cities. ( The app is not connected to the internet)

But this time no matter what city I type in it shows a latitude of 40.24.

Now it bases all the sun and moon charts, day/night lengths off of the incorrect lattitude.

How do I go about figuring the diffrence?

I don't wanna give my exact latitude of course, but it's off a couple degrees.
How many minutes of sunlight change is there per degree change?

 

[calisun]

Try LunaSolCal app on android phone. It works pretty good for me

 

[PDX Dopesmoker]

Is the government still publishing the Naval Almanac? Its probably free online somewhere. Naval Almanac is the standard for that kinda stuff, or it was in the 20th century.

 

[therevverend]

I've been using this site for figuring that type of stuff.

https://www.timeanddate.com/sun/usa/kalamazoo

 

[St. Phatty]

I have an app that helps me record all my grow information. I used it on another device and the latitude function would work by typing a location and it would compare to a list of cities. ( The app is not connected to the internet)

But this time no matter what city I type in it shows a latitude of 40.24.

Now it bases all the sun and moon charts, day/night lengths off of the incorrect lattitude.

How do I go about figuring the diffrence?

I don't wanna give my exact latitude of course, but it's off a couple degrees.
How many minutes of sunlight change is there per degree change?

That's an interesting question.

https://aa.usno.navy.mil/data/docs/AltAz.php

Give it your location, it calculates

Altitude and Azimuth of the Sun
May 8, 2019

Pacific Daylight Time

Altitude Azimuth
(E of N)

h m o o


05:00 -11.8 54.8
05:10 -10.2 56.6
05:20 -8.6 58.4
05:30 -7.0 60.2
05:40 -5.3 61.9
05:50 -3.6 63.6
06:00 -1.9 65.3
06:10 0.3 66.9
06:20 1.9 68.6
06:30 3.5 70.2
06:40 5.3 71.8
06:50 7.0 73.3
07:00 8.8 74.9
07:10 10.7 76.5
07:20 12.5 78.0
07:30 14.3 79.6
07:40 16.2 81.1
07:50 18.1 82.7
08:00 19.9 84.2
08:10 21.8 85.8
08:20 23.7 87.4 - OK the top of the hill next to my house is at 24 degrees
so it takes some time for the sun to come out.
08:30 25.6 89.0
08:40 27.5 90.6
08:50 29.4 92.3
09:00 31.3 94.0
09:10 33.1 95.7
09:20 35.0 97.5
09:30 36.9 99.3
09:40 38.7 101.2
09:50 40.6 103.2
10:00 42.4 105.2
10:10 44.2 107.4
10:20 46.0 109.6
10:30 47.8 111.9
10:40 49.5 114.4
10:50 51.2 117.0
11:00 52.9 119.8
11:10 54.5 122.8
11:20 56.1 126.0
11:30 57.6 129.4
11:40 59.0 133.0
11:50 60.3 136.9
12:00 61.6 141.2
12:10 62.7 145.7
12:20 63.7 150.5
12:30 64.6 155.6
12:40 65.3 161.0
12:50 65.8 166.6
13:00 66.2 172.4
13:10 66.3 178.3 - there's another tree that keeps one of the gardens from getting sun till the sun is in the South (180). It's good to know that happens at 1:10, I can figure out how much sun that garden patch will get.
13:20 66.3 184.3
13:30 66.0 190.1
13:40 65.6 195.9
13:50 65.0 201.4
14:00 64.2 206.7
14:10 63.3 211.7
14:20 62.3 216.4
14:30 61.1 220.7
14:40 59.8 224.8
14:50 58.4 228.6
15:00 57.0 232.2
15:10 55.4 235.5
15:20 53.9 238.6
15:30 52.2 241.5
15:40 50.5 244.2
15:50 48.8 246.7
16:00 47.1 249.2
16:10 45.3 251.5
16:20 43.5 253.7
16:30 41.7 255.8
16:40 39.8 257.8
16:50 38.0 259.7
17:00 36.1 261.6
17:10 34.3 263.4
17:20 32.4 265.1
17:30 30.5 266.9
17:40 28.6 268.5
17:50 26.7 270.2
18:00 24.8 271.8
18:10 23.0 273.4
18:20 21.1 275.0
18:30 19.2 276.6
18:40 17.3 278.1
18:50 15.5 279.7
19:00 13.6 281.2
19:10 11.8 282.8
19:20 10.0 284.3
19:30 8.2 285.9
19:40 6.4 287.5
19:50 4.6 289.0
20:00 2.9 290.6
20:10 1.3 292.3
20:20 -0.8 293.9

0 degree is the horizon, 90 degrees for altitude = right overhead.

azimuth, east of north.

0 east of north = north.
90 east of north = east.
180 east of north = south
270 east of north = west.

Anyway that one *.mil website tells the position of the sun in the sky as close as you could need it, for any location, for any day of the year.

Hope that helps !

 

[CannaRed]

Thanks everyone. Gonna look into these