Over-ambitious, both commercially and technically, they set out to provide global coverage.
To provide global coverage, the Midas satellites were placed into polar orbits.
A polar-orbiting satellite system called Transit was established in the early 1960s by the United States to provide global coverage for ships at sea.
In so doing they might look to the airline industry where a handful of alliances provide global coverage, while enabling individual members (many of them national flag carriers) to retain their independence.
And even among poor countries, rudimentary connectivity is often available: about 85% of the world's population has access to at least a second-generation mobile-phone network, he says, which can provide limited access.Send in the dronesSo, rather than trying to provide global coverage, Facebook plans to plug specific gaps in the existing infrastructure.
These capabilities are usually focused on supporting specific targets as opposed to providing global coverage.
However, Ørsted does continue to provide global coverage of scalar data, albeit with gaps in temporal coverage.
"We're flying three satellites, with the first one going up next year, that will provide global coverage in a frequency band called Ka," says Leo Mondale of Inmarsat.
Following Ref. [8], we chose a polar orbit at 600 km altitude, providing global coverage, as representative for our hypothetical quantum satellite.
In all these studies, it is assumed that the access networks with larger coverage areas, e.g., the cellular or WiMAX network, provide global coverage which allows for end-users to directly connect to it at any location at any time.
