How do I discern Maidenhead Locator from GPS lat long info.

[tasmod]

I have made a separate switchable sub for the Big Digit clock which just uses the h, m, s, part of the gps string called alone.

Pic of result. As near accurate to second as code allows.

[tasmod]

Darrel,

I found this regarding the 4th pair.

THIRD PAIR (aa-xx)
Each field can be further divided into (24) 5 minutes (0.083333 degrees) longitudinal
by (24) 2.5 minute (0.0416665 degrees) latitudinal zones.

The first character encodes the longitude and the second encodes the latitude with
letters “a” thru “x” (refer to example 3 below).

Example 3:
Longitude = 0.338038 {Refer to example 2}
= 0.338038 / 0.083333
= 4 remainder 0.004706
= e
(location in 5th zone)
Latitude = 0.664048
= 0.664048 / 0.0416665
= 15 remainder 0.0390505
= p
(location in 16th zone)

FOURTH PAIR (00-99)
Each field can be further subdivided into (10) 30 seconds (0.008333 degrees) longitudinal
by (10) 15 seconds (0.004166) latitudinal zones. The first character encodes the longitude
and the second encodes the latitude with numbers “0” thru “9” (refer to example 4 below).

Example 4:
Longitude = 0.004706 {Refer to example 3}
= 0.004706 / 0.008333
= 0 remainder 0.004706
= 0
(location in 1st zone)
Latitude = 0.0390505 {Refer to example 3}
= 0.0390505 / 0.004166
= 9 remainder 0.001556
= 9
(location in 10th zone)

[Darrel Taylor]

Thanks Rob, that is helpful.
But the routines from the pearl script don't leave the variables in the right state to do the last part.

I'm trying to recreate it in a spreadsheet to see what values the variables should have at that point.
But finding time to look at it is difficult right now.

Just wanted to let you know I'm still working on it.

[andywpg]

I'm trying to recreate it in a spreadsheet to see what values the variables should have at that point.
But finding time to look at it is difficult right now.

Don't know if THIS PDF will help - but I was using this in my early attempts to get this figured out. It describes how to discern the 7th and 8th digits

[tasmod]

Hi Darrel,

Many thanks for this.

I wondered about the variables. I did have a try at following the code through in the hope I could perhaps work it out.

As a test. I changed the string to 8 characters and tried adding MH(7) ="0" + AINT/10 and MH(8)="0"+ AINT/10 in Lat and Lon routines after MH4 and MH5 as a trial to see what was displayed.

I think the routine at 8 chrs is referencing the midi digit routine chrs as it displays custom chrs on the LCD in those positions.

I tried repeating MH4 and 5 but renumbered, so that should give 'IO93okok' as the 7th and 8th position but again it accessed custom chrs. A puzzle for me anyway.

[tasmod]

Hi Andy,

That's the doc I took the info post from

Regarding working satellites, I downloaded a Maidenhead Locator App for my Android phone. Gives lots of other info too.
Able to get 10 digit locator from the inbuilt gps on the phone.

[Darrel Taylor]

Able to get 10 digit locator from the inbuilt gps on the phone.

Not sure if the fifth pair is also a 10x10 subdivision, since the PDF only does 8 characters.
But continuing the logic to the next pair, I'm getting that your 10 digit locator is ... IO93ok03ed

Does your Android App give a similar location?