what you are describing is Dish's QuetzSat 1 satellite at 77W.
It's principle function is to deliver Dish Mexico Satellite TV service in Mexico.
Dish is maybe 24 inches in diameter. If you are in Mexico, it's the little red dish you will see on some buildings.
But, it also transmits a limited number of US local markets in HD and most of the other US channels in SD.
The US program guide is not transmitted and the default guide will only display the current and perhaps following hour of programming (the international DVB standard transmission).