| Answer | Crossword Clue |
|---|---|
| ECHOS | Pioneering 1960s communications satellites |
| RELAYS | Communications satellites |
| LORAL | Big maker of communications satellites |
| ECHOS | Pair of early communications satellites |
| syncom | one of a series of experimental communications satellites that were the first to be placed in geostationary orbit |
| oscar | one of a series of small communications satellites, launched into polar orbit as piggyback passengers on U.S. launch vehicles, for unrestricted use by radio amateurs |
| oscars | one of a series of small communications satellites, launched into polar orbit as piggyback passengers on U.S. launch vehicles, for unrestricted use by radio amateurs |
