On Sunday, October 1, 2017 at 4:24:46 PM UTC-5, Ramy wrote:
While we at it, will be good to know if we can connect any non TSO amplified GPS antenna to the TN72 and save an additional $300, and if anyone has a recommendation.

Ramy


I wondered about this too because the TA70 is HUGE and really designed for external mounting.

I also found this quote online related to the TN72. "Where a non-TSO antenna is used, the antenna must include an integral amplifier with gain of not less than 20dB."

Below are some code definitions, and then one data set each from a TN70 Antenna and then a GPS antenna borrowed from a CAI 302. I replaced my specific coordinates with "z", but the rest of the data looks to be there. I googled $RAIM, but didn't find anything on that other than it's related to GPS accuracy, etc.



$GPGGA - Global Positioning System Fix Data
$GPVTG - Track made good and ground speed
$GPGSA - GPS DOP and active satellites
$GPZDA - Date & Time
$GPGLL - Geographic position, latitude / longitude
$GPGSV - GPS Satellites in view
$GPRMC - Recommended minimum specific GPS/Transit data


TA70 Antenna
$RAIM,128443,103224,012335,012471,020000,020000,00 0887,000896,111,5,11111111*36
$GPGGA,202757.00,zzzz.zzzzz,N,zzzzz.zzzzz,W,1,06,2 .44,-8.2,M,,M,,*73
$ACVT,1,W,000012,N,000004,U,000014*53
$GPVTG,291.94,T,,M,0.026,N,0.048,K,A*32
$GPGSA,A,3,13,15,20,21,18,10,,,,,,,3.47,2.44,2.47, 1*13
$GPZDA,202757.00,02,10,2017,,*64
$GPGLL,zzzz.zzzzz,N,zzzzz.zzzzz,W,202757.00,A,A*7B
$GPGSV,2,1,06,13,35,048,33,15,68,069,49,20,50,033, 48,21,52,330,47,1*6D
$GPGSV,2,2,06,18,44,285,47,10,17,264,38,1*6B
$GPRMC,202758.00,A,zzzz.zzzzz,N,zzzzz.zzzzz,W,0.04 4,261.96,021017,,,A,V*08

CAI 302 Antenna
$RAIM,150175,112197,013718,013213,020000,020000,00 2021,001947,111,5,11111111*31
$GPGGA,203009.00,zzzz.zzzz,N,zzzzz.zzzzz,W,1,06,2. 54,-10.0,M,,M,,*4E
$ACVT,1,E,000001,N,000004,U,000074*45
$GPVTG,14.73,T,,M,0.008,N,0.015,K,A*00
$GPGSA,A,3,20,13,15,18,21,10,,,,,,,3.53,2.54,2.45, 1*15
$GPZDA,203009.00,02,10,2017,,*69
$GPGLL,zzzz.zzzzz,N,zzzzz.zzzzz,W,203009.00,A,A*7C
$GPGSV,2,1,06,20,49,034,46,13,35,048,28,15,67,067, 46,18,44,286,48,1*66
$GPGSV,2,2,06,21,53,331,41,10,17,265,30,1*66
$GPRMC,203010.00,A,zzzz.zzzzz,N,zzzzz.zzzzz,W,0.06 7,267.22,021017,,,A,V*0E