Motorola M12 Oncore User Manual page 22

Motorola GPS Products
M12 Oncore User' s Guide Supplement
Revision 1.0 01/25/00
ATMOSPHERIC CORRECTION MODE
The user has the flexibility of turning the GPS ionospheric and/or tropospheric
correction models on or off. The models do a reasonable job of taking out the range
error induced by the earth' s ionosphere and troposphere by using algorithms and
parameters transmitted to the users by the satellites. For some applications, such as
differential systems, the atmospheric models should be disabled since the differential
corrections include the atmospheric errors.
Default modes: Ionospheric model enabled
Tropospheric model disabled
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