|
gptkbp:instance_of
|
gptkb:space_mission
|
|
gptkbp:analysis
|
NASA scientists
|
|
gptkbp:collaborator
|
gptkb:none
|
|
gptkbp:collection
|
in-situ measurements
|
|
gptkbp:contribution
|
understanding of cosmic rays
|
|
gptkbp:data_return
|
cosmic ray data
|
|
gptkbp:data_transmission
|
radio signals
|
|
gptkbp:data_type
|
scientific data
|
|
gptkbp:data_usage
|
research and analysis
|
|
gptkbp:debut
|
gptkb:true
|
|
gptkbp:design
|
1 year
|
|
gptkbp:frequency
|
108 MHz
|
|
gptkbp:has_programs
|
Explorer program
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Explorer 4
|
|
gptkbp:instrumentation
|
cosmic ray detectors
|
|
gptkbp:international_mission
|
false
|
|
gptkbp:is_aplace_for
|
800 km
|
|
gptkbp:launch_date
|
gptkb:1968
15:00 UTC
1968-07-12
|
|
gptkbp:launch_mass
|
45 kg
|
|
gptkbp:launch_site
|
gptkb:Cape_Canaveral
|
|
gptkbp:launch_vehicle
|
gptkb:Juno_II
|
|
gptkbp:legacy
|
paved way for future missions
|
|
gptkbp:mass
|
45 kg
|
|
gptkbp:mission
|
1969-01-01
Earth science
successful
battery depletion
|
|
gptkbp:mission_duration
|
6 months
|
|
gptkbp:mission_type
|
gptkb:scientific_research
|
|
gptkbp:notable_mission
|
first successful mission to study cosmic rays
|
|
gptkbp:objective
|
measure cosmic rays
|
|
gptkbp:operator
|
gptkb:NASA
|
|
gptkbp:orbit_type
|
low Earth orbit
|
|
gptkbp:orbital_inclination
|
45 degrees
|
|
gptkbp:orbital_period
|
90 minutes
|
|
gptkbp:perigee
|
600 km
|
|
gptkbp:reign
|
90 minutes
|
|
gptkbp:release_country
|
gptkb:United_States
|
|
gptkbp:scientific_goals
|
study radiation environment
|
|
gptkbp:scientific_instruments
|
Geiger counters
|
|
gptkbp:spacecraft
|
gptkb:satellite
cylindrical
|
|
gptkbp:speed
|
no
|
|
gptkbp:status
|
inactive
decommissioned
|
|
gptkbp:storage
|
onboard tape recorder
|
|
gptkbp:success
|
gptkb:true
|
|
gptkbp:successor
|
gptkb:Explorer_5
|
|
gptkbp:bfsParent
|
gptkb:Explorer_1
|
|
gptkbp:bfsLayer
|
4
|