Helium-filled
envelope
Approximately
60 metres in
diameter.
Navigates by
wind currents
Payload
Estimated to be
about the
same size as a
regional jetliner
and to weigh
more than 900
kilogrammes
Solar panels
Operating altitude
40km
35
30
25
24-37km
Surveillance balloon
20
Fighter aircraft
20km
15
12km
10
Commercial airliners
5
4.5km
Helicopters
0
Operating altitude
40km
Helium-filled
envelope
Approximately
60 metres in diameter.
Navigates by wind
currents
35
30
24-37km
25
Surveillance balloon
20
20km
Fighter aircraft
15
Payload
Estimated to be
about the same size
as a regional jetliner
and to weigh more than
900 kilogrammes
10
Solar panels
12km
Commercial airliners
5
4.5km
0
Helicopters