|
gptkbp:instance_of
|
gptkb:satellite
|
|
gptkbp:academic_programs
|
gptkb:Jet_Propulsion_Laboratory
|
|
gptkbp:analysis
|
conducted by scientists
led to new discoveries
|
|
gptkbp:associated_with
|
gptkb:NASA
|
|
gptkbp:celebrates
|
50th anniversary in 2008
|
|
gptkbp:challenges
|
miniaturization of technology
|
|
gptkbp:collaborated_with
|
gptkb:none
|
|
gptkbp:collaboration
|
gptkb:none
|
|
gptkbp:collaborator
|
gptkb:NASA
|
|
gptkbp:collection
|
yes
cosmic rays
1958-1965
radiation measurements
|
|
gptkbp:community
|
global
welcomed its findings
|
|
gptkbp:contributed_to
|
space science
understanding of Earth's radiation belts
|
|
gptkbp:contribution
|
space science
understanding of Earth's magnetosphere
radiation environment of Earth
|
|
gptkbp:country
|
gptkb:United_States
|
|
gptkbp:cultural_impact
|
inspired media and literature
inspired generations
inspired public interest in space
|
|
gptkbp:data_return
|
scientific data
over 10,000 data points
|
|
gptkbp:data_transmission
|
yes
radio signals
|
|
gptkbp:data_type
|
cosmic rays
cosmic ray data
|
|
gptkbp:data_usage
|
gptkb:scientific_research
108.0 MHz
|
|
gptkbp:debut
|
Explorer program
|
|
gptkbp:decommissioned
|
gptkb:1958
gptkb:1965
|
|
gptkbp:design
|
gptkb:NASA
1 year
cylindrical
|
|
gptkbp:developed_by
|
gptkb:Jet_Propulsion_Laboratory
|
|
gptkbp:diameter
|
15.24 cm
|
|
gptkbp:dimensions
|
80 cm x 15.2 cm
80 cm x 15 cm
|
|
gptkbp:discovered_by
|
gptkb:Van_Allen_radiation_belts
|
|
gptkbp:discovery
|
gptkb:Van_Allen_radiation_belts
|
|
gptkbp:duration
|
approximately 12 years
|
|
gptkbp:educational_programs
|
STEM initiatives inspired by its legacy
|
|
gptkbp:educational_value
|
STEM fields
STEM education initiatives
|
|
gptkbp:has_programs
|
Explorer program
|
|
gptkbp:has_reception
|
positive
widely celebrated
|
|
gptkbp:height
|
15.2 cm
|
|
gptkbp:historical_context
|
gptkb:Cold_War
|
|
gptkbp:historical_event
|
beginning of U. S. satellite program
|
|
gptkbp:historical_significance
|
gptkb:Cold_War_space_race
first U. S. satellite to orbit Earth
first successful U. S. satellite
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Explorer 1
|
|
gptkbp:impact
|
gptkb:space_exploration
gptkb:significant
high
space science
space physics
increased interest in space exploration
|
|
gptkbp:impact_on_space_race
|
gptkb:significant
|
|
gptkbp:influenced
|
gptkb:scientific_research
satellite technology
public interest in space
international space race
space exploration policy
future satellite missions
U. S. space policy
|
|
gptkbp:influenced_by
|
gptkb:Sputnik_1
|
|
gptkbp:inspiration
|
future satellite designs
future satellites
|
|
gptkbp:inspired
|
gptkb:scientific_community
future satellite designs
future space exploration efforts
subsequent satellite missions
subsequent space exploration efforts
|
|
gptkbp:inspired_programs
|
subsequent Explorer missions
|
|
gptkbp:instruments
|
gptkb:battery
gptkb:radio_station
gptkb:magnetometer
temperature sensors
thermistor
data recorder
|
|
gptkbp:international_recognition
|
gptkb:1958_Alpha_1
|
|
gptkbp:is_aplace_for
|
2,500 km
1,600 kilometers
2468 km
2580 km
|
|
gptkbp:launch_date
|
January 31, 1958
22:48 UTC
|
|
gptkbp:launch_event
|
successful
|
|
gptkbp:launch_mass
|
8.5 kg
18.6 kg
8.5 kilograms
|
|
gptkbp:launch_site
|
gptkb:Cape_Canaveral
|
|
gptkbp:launch_vehicle
|
gptkb:Juno_I
|
|
gptkbp:launched
|
gptkb:United_States
January 31, 1958
|
|
gptkbp:legacy
|
paved the way for future space missions
paved the way for future missions
paved the way for future satellites
pioneering satellite technology
|
|
gptkbp:legislation
|
U. S. space policy
US space policy
|
|
gptkbp:length
|
80 cm
80.0 cm
80 centimeters
|
|
gptkbp:manufacturer
|
gptkb:Jet_Propulsion_Laboratory
|
|
gptkbp:mass
|
18.5 kg
18.6 kg
18.5 pounds
18.6 pounds
|
|
gptkbp:memorials
|
various commemorations
|
|
gptkbp:mission
|
gptkb:1958
gptkb:1960
gptkb:1965
gptkb:scientific_research
U. S. space exploration efforts
|
|
gptkbp:mission_duration
|
4 years
|
|
gptkbp:mission_type
|
gptkb:scientific_research
scientific
|
|
gptkbp:notable_achievement
|
gptkb:first_successful_U._S._satellite_launch
first U. S. satellite to reach orbit
first detection of radiation belts
|
|
gptkbp:notable_feature
|
first American satellite
|
|
gptkbp:notable_figures
|
gptkb:William_Hayward_Pickering
gptkb:Wernher_von_Braun
gptkb:James_Van_Allen
|
|
gptkbp:notable_mission
|
gptkb:Explorer_11
gptkb:Explorer_19
gptkb:Explorer_18
gptkb:Explorer_10
gptkb:Explorer_12
gptkb:Explorer_13
gptkb:Explorer_14
gptkb:Explorer_15
gptkb:Explorer_16
gptkb:Explorer_17
gptkb:Explorer_20
gptkb:Explorer_21
gptkb:Explorer_22
gptkb:Explorer_24
gptkb:Explorer_25
gptkb:Explorer_26
gptkb:Explorer_27
gptkb:Explorer_28
gptkb:Explorer_29
gptkb:Explorer_3
gptkb:Explorer_30
gptkb:Explorer_4
gptkb:Explorer_5
gptkb:Explorer_6
gptkb:Explorer_7
gptkb:Explorer_8
gptkb:Explorer_9
Explorer 2
Explorer 23
|
|
gptkbp:objective
|
measure cosmic rays
study cosmic rays
|
|
gptkbp:operated_by
|
gptkb:NASA
|
|
gptkbp:operational_status
|
completed
decommissioned
|
|
gptkbp:operational_use
|
12 years
about 12 years
|
|
gptkbp:operator
|
gptkb:NASA
|
|
gptkbp:orbit_type
|
gptkb:Earth
Low Earth Orbit
Elliptical
low Earth orbit
decayed into atmosphere
to be launched by the United States
approximately 2,500 km altitude
|
|
gptkbp:orbital_altitude
|
varied
between 358 km and 1,580 km
|
|
gptkbp:orbital_decay_rate
|
gradual
|
|
gptkbp:orbital_inclination
|
30 degrees
40.5 degrees
30.0 degrees
|
|
gptkbp:orbital_period
|
yes
eventual reentry
eventually reentered Earth's atmosphere
114.8 minutes
due to atmospheric drag
|
|
gptkbp:part_of
|
gptkb:Cold_War_space_race
gptkb:U._S._space_program
U. S. space history
|
|
gptkbp:perigee
|
358 km
358 kilometers
|
|
gptkbp:predecessor
|
gptkb:Sputnik_1
|
|
gptkbp:provides_information_on
|
gptkb:scientists
international scientists
|
|
gptkbp:public_awareness
|
increased interest in STEM
|
|
gptkbp:public_interest
|
high
|
|
gptkbp:public_perception
|
increased interest in space
|
|
gptkbp:radio_transmitter
|
yes
|
|
gptkbp:reentry_altitude
|
approximately 800 km
|
|
gptkbp:reentry_cause
|
orbital decay
|
|
gptkbp:reentry_year
|
gptkb:1970
|
|
gptkbp:reign
|
114.8 minutes
|
|
gptkbp:related_event
|
gptkb:space_exploration
|
|
gptkbp:scientific_instruments
|
gptkb:cosmic_ray_detector
|
|
gptkbp:service
|
gptkb:first_U._S._satellite
first American satellite
U. S. satellite in space
|
|
gptkbp:significance
|
first successful U. S. satellite
first U. S. satellite to reach orbit
first scientific satellite of the United States
first successful US satellite
|
|
gptkbp:speed
|
gptkb:1960
gptkb:1965
1970s
no
not applicable
April 1970
|
|
gptkbp:status
|
decommissioned
deorbited
reentered Earth's atmosphere
|
|
gptkbp:successor
|
gptkb:Explorer_3
Explorer 2
|
|
gptkbp:sustainability
|
gptkb:none
|
|
gptkbp:type
|
gptkb:satellite
|
|
gptkbp:weight
|
18.5 pounds
|
|
gptkbp:width
|
15.2 cm
|
|
gptkbp:bfsParent
|
gptkb:NASA
|
|
gptkbp:bfsLayer
|
3
|