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Author Arthur C. Clarke's 1945 paper "Extra-Terrestrial Relays" proposed the idea of these orbital devices to aid communications |
satellites
|
$600 |
J |
COMMUNICATION |
2024-12-16 |
#9226 |
|
Lens is a platform that helps climate scientists affordably access imagery from these craft, like the Planetscope ones |
satellites
|
$200 |
J |
TECHNOLOGY |
2024-05-15 |
#31 |
|
To transmit signals, these vehicles usually maintain orbits above a fixed point on the globe |
satellites
|
$600 |
DJ |
COMMUNICATION |
1998-03-02 |
#3116 |
|
Services like DirecTV compete with cable by beaming signals into the home from these on high |
Satellites
|
$400 |
DJ |
COMMUNICATION |
1997-06-30 |
#2971 |
|
Successful types of these satellites have included the European Meteosat & the American Nimbus |
weather satellites
|
$600 |
DJ |
SCIENCE & TECHNOLOGY |
1992-02-10 |
#1721 |