The tables below compare GPSFlight technology to other available options on the market.  Note that some of these comparable options are really not really designed for real-time telemetry, but they are being used for this.  GPSFlight is built from the ground up to be the best real-time position telemetry solution on the market. 

As you can see from this table, nothing else even comes close the the power of GPSFlight.

Updated 6/08

• Software Comparison
• Hardware Comparison

Software Comparison     GPSTeam Pro uBlox Visual GPSXP DeLorme Street Atlas 9.0 WinAPRS SRP-Software $249 Shareware Shareware ($20) $199 Shareware ($20) BASE FEATURES           NMEA GPS Protocol Support Yes Yes Yes Yes No TracID SWARM Protocol Support Yes No No No No APRS Plotting Yes No No No Yes Displays Barometric Alt and GPS alt together Yes No No No No Allows 'Ground Zero' setting for altitude and range Yes No No No No Shows range and bearing from Ground Zero Yes No No No No Data window with statistics Yes Yes Yes No No Automatic Recording every (time period) as a Service Yes No No No No Export recorded data to different formats NMEA CSV KML GPX No Limited No No Live data feed to Google Earth Yes No No No No PLOT WINDOW           Plot Window shows unit with trace lines Yes Yes Yes Yes Yes Map Overlay Yes Yes No Yes Yes Pan and Zoom Plot Yes Limited No Yes Yes Auto-zoom feature Yes No Yes Yes Yes Maximum simultaneous units onscreen Unlimited 1 1 1 Unlimited Units ID shown on Screen Yes No No No Yes Fastest update rate 1/10th Sec 1 Sec 1 Sec 1 Sec 5-10 Sec Center on Specific Unit Reporting Yes No No No Yes Clear Plot traces Yes No No Yes Yes Different color trails for different reporting units Yes No No No Yes Different color trails for different reporting speeds Yes No No No Yes Set Trail length Yes No No No Yes OTHER FEATURES           Configure GPS Settings Yes No No No No Events/Waypoints Table Yes No No No No Recording and playback of data Yes Yes Yes Yes No Individual Reporting Unit table with current and max values Yes No No No No Assign Unit IDs to long names Yes No No No No Assign IDs to groups Yes No No No No Assign IDs to destinations and report success Yes No No No No MOVING MAPS           Zoom and Auto Pan on map Yes No No No No Import Maps as JPGs Yes No No No No Display MS Teraserver Maps Yes Yes Yes Yes No Microsoft Virtual Earth Map Yes No No No No Google Map Support Yes No No No No MAP ATTRIBUTES           Geofencing/Zones Yes No No No No Geofencing by Time of Day Yes No No No No Exclusion and Inclusion GeoFencing Yes No No No No Points of Interest Yes No No No No Email/SMS alerts for zone entry Yes Yes Yes Yes No Measure Distance Yes No No No No Icon Library Yes No No No No Hardware Comparison     GPSFlight ST900 Garmin eTrex w/SmallHT - APRS(1) RDAS w/ GPS & Telemetry(2) Walston Tracker(3) SRP- Transmitter $TBD $450 $525 $150 Frequency 902-917 MHz 144.95 MHz 433MHz (Lynx) 216.095 MHz Refresh Rate 4Hz (250ms) 5 seconds Unk Unk Modulation Type Spread Spectrum FM FM AM GPS Sensitivity -160 (indoors) -148 Unk Unk Data Receive Sensitivity -110db -70db Unk. NA Range - Line of Sight 40 mi 10mi 3mi 10mi Sends GPS Lat/Long Yes Yes Yes No Sends GPS Sats used /VDOP/ Pos Accuracy Yes No No No Sends Vertical, Horizontal Speed Yes Horizontal only Yes No Sends Barometric Altitude Yes No No No Sends NMEA Data Yes No No No Sends TracID Data Yes No No No Sends Battery level Yes No No No Sends External Events Yes No No No Size of Units inc. GPS, Radio, Firmware 1.9"x2.8"x1.2" without battery 5"x5"x5" parts together 7"x1.38" parts together without battery .5*4"(?) Weight 55 gms ~400gms ~150-200gms ? 10gms HAM license Not Required Required Required Unk. Can use multiple transmitters in the area Yes Yes No No Other Frequencies Offered 2.4G NA NA Unk

(1) Garmin eTrex connected to small HT at 145Mhz APRS band, using TinyTracII TNC. Custom wiring. Requires HAM license. Est TX cost $500.
(2) RDAS accelerometer, Transmitter unit, GPS unit. Requires HAM license.
(3) Limited data available on Walston unit - not really a telemetry unit, more an animal tracking device

For the APRS transmitter, Max reporting time is 1 second, but only in areas where other APRS traffic is not around.  Also updates less than 5 seconds tend to make the TinyTrac unit confused.