Low Power Low Cost GPS-6012 Operating Manual
Rikaline
Rikaline
International Corp.
10F, 64, Kang-Ding Road, Taipei 108, Taiwan
Tel: ++886 2 2370 4688 Fax: ++886 2 2370 4686 E-Mail:
Web: www.rikaline.com.tw
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2. Operational characteristics
2.1 Initialization
As soon as the initial self-test is complete, the GPS-6012 begins the process of satellite acquisition and
tracking automatically. Under normal circumstances, it takes approximately 90 seconds to achieve a position fix
at the first time, 45 seconds if ephemeris data is known. After a position fix has been calculated, information
about valid position, velocity and time is transmitted over the output channel.
The GPS-6012 utilizes initial data, such as last stored position, date, time and satellite orbital data, to
achieve maximum acquisition performance. If significant inaccuracy exists in the initial data, or the orbital data
is obsolete, it may take more time to achieve a navigation solution. However, acquisition performance can be
improved when the host system initializes the GPS-6012 in the following situation:
1) Moving further than 1,500 kilometers.
2) Failure of data storage due to the inactive internal memory battery.
2.2 Navigation
After the acquisition process is complete, the GPS-6012 sends valid navigation information over output
channels. These data include:
1) Latitude/longitude/altitude
2) Velocity
3) Date/time
4) Error
estimates
5) Satellite and receiver status
