hemisphere
space reconnaissance
Landsat
fixed satellite
geodemographics
altazimuth
secondary
satellitary
SIGINT
bird
weather satellite
meteorological satellite
Moon
Skylab
moon
radargram
radar astronomy
solar telescope
ionosonde
La Silla
aerial photography
footprint
intersatellite
astronomy satellite
stellium
apogee
satnav
satellite navigation system
WINDSAT
satellite-framing
geobarometric
satellite-framed
radio observation
observatorial
magnetotellurics
pole
surveyor
total station
Clarke orbit
observatory
star chart
selenographer
astrogation
astronav
X-ray telescope
radiospectrometer
aerographics
geobarometrically
transearth
communications satellite