[aprssig] GPS 18 coordinates

[Andrew Rich (Home)]

Even the GARMIN docs are wrong

Here is a dump from my GPS18 a few minutes ago

$GPRMC,000444,V,2720.2292,S,15302.6105,E,,,080809,011.1,E*7B

The docs say 

Latitude ddmm.mmm
Longitude ddmm.mmm    

It should read

Latitude ddmm.mmmm (leading zeros transmitted)
Longitude dddmm.mmmm (leading zeros transmitted)    

 


----------------------------------------------------------
Andrew Rich 
Amateur Radio Callsign VK4TEC
email: vk4tec at tech-software.net
web: www.tech-software.net
  ----- Original Message ----- 
  From: Gary 
  To: 'TAPR APRS Mailing List' 
  Sent: Sunday, August 09, 2009 12:46 AM
  Subject: Re: [aprssig] GPS 18 coordinates


  Have you checked Garmin's technical manual for the 18? It's a free download from them.
  Gary

   


------------------------------------------------------------------------------

  From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf Of Andrew Rich (Home)
  Sent: Friday, August 07, 2009 10:23 PM
  To: TAPR APRS Mailing List
  Subject: [aprssig] GPS 18 coordinates

   

  Hello

   

  Doing some more work on a tracker here, in ASM for the 16F628

   

  I worked out my GPS18 does degrees minutes and decimal minutes 

   

  I am not sure what it will do in those areas where the degrees goes less than 3 and two digits, as I am at -2700.0000 and 15300.0000

   

  Can anyone help me to make my track "universal" by supplying some NMEA examples of a GPS 18

   

  At the moment I see

   

   2700.0000

  15300.0000

   

  My question is, does the GPS 18 zero pad ? when it gets to be smaller than two digits, assuming 90 is the largest and 180 is the largest

   

  ,0600.0000, or ,600.0000,  (-90 to +90) 6 degrees

   

  ,08700.0000, or ,8700.0000, (-180 to +180) 87 degrees

   

  ,00800.0000, or ,800.0000, (-180 to + 180) 8 degrees

   

  Andrew 

   

   

   

   

  ----------------------------------------------------------
  Andrew Rich 
  Amateur Radio Callsign VK4TEC
  email: vk4tec at tech-software.net
  web: www.tech-software.net



------------------------------------------------------------------------------


  _______________________________________________
  aprssig mailing list
  aprssig at tapr.org
  https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig



------------------------------------------------------------------------------



  No virus found in this incoming message.
  Checked by AVG - www.avg.com 
  Version: 8.5.392 / Virus Database: 270.13.47/2290 - Release Date: 08/08/09 06:10:00
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.tapr.org/pipermail/aprssig_lists.tapr.org/attachments/20090809/a3c24064/attachment.html>