Subject
National security
Astronautics, Military
8
Outer space Strategic aspects
7
Outer space Government policy
4
Astronautics and state
3
Space control (Military science)
3
Space surveillance
3
Artificial satellites Security measures
2
Competition
2
Disasters Remote sensing
2
Emergency management Remote sensing
2
Global Positioning System Security measures
2
Launch vehicles (Astronautics)
2
Outer space Exploration
2
Rules and practice
2
Space launch industry
2
Space security
2
Space security Government policy
2
Appropriations and expenditures
1
Intelligence service
1
International law
1
Outer space
1
Outer space Civilian use International cooperation
1
Outer space Exploration Government policy
1
Procurement
1
Space debris
1
Space environment
1
Space law
1
Space security International cooperation
1