Nokia 9000 Quick Manual page 4

GPD
GPS
GPS Antenna
GPS Receiver
GPS Time
Maximum PDOP
NAVSTAR
NMEA
NMEA 0183 message
PDOP
Relative Positioning
RS-232
RxD
SA
Copyright. 1999. Nokia Mobile Phones. All right reserved
GPS with differential corrections applied.
Global Positioning System. A constellation of 24 radio navigation
satellites which transmit signals used (by GPS receivers) to determine
precise location (position, velocity and time) solutions. GPS signals are
available worldwide, 24 hours a day, in all weather conditions. This
system also includes 5 monitor ground stations, 1 master control ground
station and 3 upload ground stations. GPS provides 20 to 50 meter
position accuracy without differential correction.
An antenna designed to receive GPS radio navigation signals.
The combination of a GPS antenna and a GPS processor.
The length of the second is fixed and is determined by primary atomic
frequency standards. Leap seconds are not used, as they are in UTC.
Therefore, GPS time and UTC differ by a variable whole number of
seconds.
A measure of the maximum Position Dilution of Precision that is
acceptable in order for a GPS processor to determine a location solution.
The name given to the GPS satellites, built by Rockwell International,
which is an acronym formed from NAVigation System with Time And
Ranging.
National Marine Electronics Association. An association that defines
marine electronics interface standards for the purpose of serving the
public interest.
The NMEA 0183 is a standard for interfacing marine electronics
navigational devices. The standard specifies the message format used to
communicate with marine devices/components.
Position Dilution of Precision. PDOP is a unitless figure of merit that
describes how an uncertainty in pseudo-range affects a position solution.
The process of determining the vector distance between two points and
the coordinates of one spot relative to another. This technique yields a
GPS position with greater precision than single point positioning mode
can.
A communication standard for digital data.
Received Data. RS-232 Signal Function Connector Pin Designation.
Selective Availability
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