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Sources of GPS Error
GPS receivers have potential position errors due to some of the following sources:
- User mistakes account for most GPS errors. Incorrect datum and typographic errors
when inputting coordinates into a GPS receiver can result in errors up to many
kilometers.
- Orbital errors
- Atmospheric distortion
- Selective Availability
- Satellite clock errors
- Receiver clock errors
- Multipath interference
- Tropospheric interference
- Ionospheric interference
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