Is it correct to Assuming the amount of Mexican companies in this paper is because of their receiver being in the major city southwestmost corner of the country ?
If you were in say, Alice Springs in Australia (wink wink) for example, you'd be able to see traffic for Indonesia, Philippines, most of South East Asia, and perhaps parts of China, South Korea and Japan if the beams are right.
location location location is an apt phrase for more than just real estate
Pine Gap is a large facility for collecting data coming down from our own satellites.
Foreign satellite collection in Australia happens at two other facilities: https://en.wikipedia.org/wiki/Shoal_Bay_Receiving_Station https://en.wikipedia.org/wiki/Australian_Defence_Satellite_C...