----- Original Message -----
From: <NaB25J@aol.com>
To: <PICLIST@mit.edu>
Sent: Wednesday, September 01, 2004 8:15 PM
Subject: [OT]: Magellan Field Pro V Data Format


> Hey all,
> Sorry for the OT post, but I'm running low on options here. I have a
Magellan Field Pro V GPS (1992 vintage) that was donated to a club I'm a
member of. They gave it to me to take a look at. I successfully pulled data
off of it last night, but I've got no idea what format it's in. I was hoping
it would spit out NMEA data or something. Alas, that was not the case. I've
searched the internet forward and backward, and come up dry trying to
identify this format. I'm hoping someone here might have an idea or two.
Here's an example of what I retrieved:
>

These are my guesses
>
> TIME,LAT,LON,ALT [len=17]
> +02.68459000491257E+05 [len=23]   ;Time in gps week (secs)
> +05.89388182162860E-01 [len=23]    ;Lat (deg.)
> -02.05972013353645E+00 [len=23]    ;Long (deg.)
> -02.16325244903564E+01 [len=23]    ;Alt (m) elipsoid or sea level
> SATS,SNR,GPSWK [len=15]
> 26 08 11 07  [len=13]                           ;Sat numbers in fix
> 0026 0070 0066 0052  [len=21]           ;signal to noise for each sat
respectively
> 1286 [len=5]                                         ;GPS week
> PDOP [len=4]                                       ;Position Dilution of
Position (PDOP)
> +02.75000000000000E+00 [len=23]   ;PDOP
> MODE 3D  V2.0 [len=14]                    ;fix is 3D

GPS time and week definitions you will have to google for.  Time is
something like seconds from Midnight Sun/Mon.  Weeks is from Jan 1 1980, I
believe.  There is also a 13 second offset between gps and UTC.

If Lat and Long don't make sense for your position look at factors of rad
and pi.

Regards,

Gordon  Williams

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