|
gptkbp:instance_of
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gptkb:navigation_system
|
|
gptkbp:application
|
gptkb:navigation
mapping
timing
|
|
gptkbp:coverage
|
yes
|
|
gptkbp:debut
|
gptkb:1978
|
|
gptkbp:developed_by
|
gptkb:United_States_Department_of_Defense
|
|
gptkbp:frequency
|
L1, L2, L5
|
|
gptkbp:has_component
|
control segment
space segment
user segment
|
|
gptkbp:has_limitations
|
dense foliage
poor weather conditions
urban canyons
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Global Positioning System (GPS)
|
|
gptkbp:involved_technology
|
gptkb:Bei_Dou
gptkb:GLONASS
gptkb:Galileo
|
|
gptkbp:is_maintained_by
|
gptkb:United_States_Space_Force
|
|
gptkbp:is_used_in
|
gptkb:civil_aviation
gptkb:smartphone
gptkb:emergency_services
gptkb:drones
agriculture
maritime navigation
geocaching
surveying
automotive navigation
|
|
gptkbp:market_segment
|
gptkb:military
commercial
civilian
|
|
gptkbp:operates
|
gptkb:geostationary_orbit
|
|
gptkbp:operates_in
|
global
|
|
gptkbp:orbit_type
|
at least 24
|
|
gptkbp:performance
|
gptkb:differential_GPS
within a few meters
|
|
gptkbp:provides
|
location information
speed information
direction information
|
|
gptkbp:requires
|
gptkb:Earth_observation
|
|
gptkbp:security
|
anti-spoofing
Selective Availability
|
|
gptkbp:service_type
|
precise positioning service
standard positioning service
|
|
gptkbp:signal_delay
|
ionospheric delay
multipath delay
satellite clock error
|
|
gptkbp:system
|
satellite-based
|
|
gptkbp:time_to_first_fix
|
seconds to minutes
|
|
gptkbp:uses
|
gptkb:GPS_satellites
satellite signals
atomic clocks
ground control stations
trilateration
|
|
gptkbp:bfsParent
|
gptkb:Space_Force
|
|
gptkbp:bfsLayer
|
4
|