A question about satellites?

Question

hi. All we know Hotbird satellite is situated on 13° E or Telstar 12 is on 15.0°W . i want to know on what basis we can find the direction of satellites . which line is the standard for distinguishing west or east direction. thnaksfor your anwers

Answer 1

The 0 degree meridian, which passes through Greenwich Observatory, London UK is the line you are talking about. The satellite position is given relative to this.