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gptkbp:instance_of
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gptkb:Earth_observation
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gptkbp:communication_system
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gptkb:CDMA
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gptkbp:constellation
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gptkb:GPS_constellation
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gptkbp:data_usage
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50 bps
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gptkbp:debut
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gptkb:1994
February 14, 1989
Multiple launches from 1989 to 1994
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gptkbp:decommissioned
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gptkb:2009
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gptkbp:development
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gptkb:1980s
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gptkbp:frequency
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L1, L2
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gptkbp:frequency_stability
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±5 ppm
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gptkbp:home_ground
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gptkb:GPS_Control_Segment
gptkb:GPS_Master_Control_Station
GPS ground stations
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https://www.w3.org/2000/01/rdf-schema#label
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GPS Block II series
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gptkbp:is_integrated_with
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Integrated with GPS Control Segment
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gptkbp:launch_date
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gptkb:1989
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gptkbp:launch_mass
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1,000 kg
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gptkbp:launch_site
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gptkb:Cape_Canaveral_Air_Force_Station
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gptkbp:launch_vehicle
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gptkb:Delta_II
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gptkbp:launched
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gptkb:12
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gptkbp:manufacturer
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gptkb:Rockwell_International
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gptkbp:market_segment
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gptkb:Master_Control_Station
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gptkbp:military_technology
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gptkb:Yes
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gptkbp:modulation
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BPSK
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gptkbp:navigation_system
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gptkb:Standard_Positioning_Service_(SPS)
gptkb:Earth_observation
10 meters
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gptkbp:operational_status
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Decommissioned
Operational until decommissioned
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gptkbp:operational_use
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7.5 years
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gptkbp:orbit_type
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gptkb:Delta_II_rocket
gptkb:GPS_IIR-1
gptkb:Pseudorandom_noise_code_(PRN)
gptkb:12
gptkb:GPS_IIA-1
Modular design
Radio frequency communication
Medium Earth Orbit (MEO)
Solar power system
A2100
3-axis stabilized
7.5 years
Deployed in orbit from 1989 to 1994
Navigation satellite
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gptkbp:orbital_altitude
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20,200 km
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gptkbp:orbital_period
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12 hours
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gptkbp:performance
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10 meters
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gptkbp:power_source
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Solar panels
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gptkbp:primary_use
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Navigation
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gptkbp:replaced_by
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gptkb:GPS_Block_IIR
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gptkbp:signal_frequency_l1
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1575.42 MHz
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gptkbp:signal_frequency_l2
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1227.60 MHz
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gptkbp:successor
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gptkb:GPS_Block_III_series
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gptkbp:track
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Ground-based tracking stations
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gptkbp:user_countries
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gptkb:Yes
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gptkbp:weight
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1,000 kg
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gptkbp:bfsParent
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gptkb:GPS_IIR_satellites
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gptkbp:bfsLayer
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6
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