Meridian Data Transplant CF LP GPS Receiver - Manual (Page 12)

Prepare to use your CF LP GPS Receiver
To help you begin to use your CF LP GPS, read this User Guide in the first step. The
User Guide explains the detail how the CF LP GPS operates, functions, and common
features of the CF LP GPS. A short glossary of GPS related terms and abbreviations
at the back of the User Guide.
Before you begin using your CF LP GPS, you must complete the GPS/MAP
application software installation to your Pocket PC or Laptop. For information
about Pocket PC operation and application software installation, please refer to the
documentation that accompanies each product.
For detailed operation information, please consult Chapter 3. In order to get more
familiar with your CF LP GPS, please first read Chapter 2 before operating the CF LP
GPS.
GPS signal reception
The Global Positioning System (GPS) is a space-based radio-navigation system.
This system consists of 24 satellites, which orbit the Earth at an altitude of
approximately 17,500 kilometers, and ground control stations. Each of the 24
satellites, deployed in 6 orbital planes, circles the earth twice a day. The system
satellites continuously transmit signals contain the information of time and distance
in a precise formation, 24 hours a day in any weather condition, everywhere around
the world. By processing the signals received, CF LP GPS provides users with
helpful information of position, velocity, and time for navigation and location
awareness purposes anywhere anytime on the Earth.
The CF LP GPS offers high position accuracy and fast Time-To-First-Fix (TTFF),
which rely on environment circumstances where receiver located as well as initial
states of the receiver. During attempting to a position fix, the receiver needs to lock
on to at least 3 satellites and, uses the signal can be received as well as the data of
latest position stored in the receiver’s digital memory in order to compute the
location of the device.
Environmental factors that influence the position accuracy and TTFF including such
as
tall buildings,
narrow streets and passageways,
12