GPS Signal Reception
6
© 2004 TeleType GPS
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Poor satellite geometry situations
The initial state of the receiver refers to the last status of the receiver in memory. This mainly
determines the length of time it will take for your GPS receiver to obtain a position fix. Your position
can be quickly fixed within 8 seconds from a "hot-start" state, and typically 45 seconds from a "cold-
start" state. It takes at least 3 to 5 minutes to obtain a position fix from a completely restart-state, for
example, flying at a distance over 300 miles from the initial origin.
The TeleType GPS Bluetooth GPS Receiver uses the satellite signals to calculate your exact location
by computing your distance from the satellites. The position data within the receiver is then converted
into latitude and longitude coordinates, which are usually provided in the geodetic datum on which the
GPS is based (WGS84). Using the wrong datum can result in position offsets for many miles.
In addition to incorrect datum, there are a number of positioning errors that can occur which affect the
accuracy of your TeleType GPS Bluetooth GPS Receiver. The major errors including satellite orbiting
errors, poor satellite geometry, multi-path signals, atmospheric delay, and receiver clock timing.
6
Hardware Description
6.1
Device Description
Device Description:
*Your actual TeleType GPS Mini-Bluetooth GPS receiver may look different from the one pictured above, but the functions and
buttons are the same.
