I think what iso8859 is trying to say is that a geostationary orbit is very far, so it's still a narrow angle, as illustrated here: http://stream2.cma.gov.cn/p

I think what iso8859 is trying to say is that a geostationary orbit is very far, so it's still a narrow angle, as illustrated here: http://stream2.cma.gov.cn/pub/comet/SatelliteMeteorology/GOESRBenefitsofNextGenerationEnvironmentalMonitoring/comet/goes_r/envmon/media/graphics/goes_orbit.jpg http://stream2.cma.gov.cn/pub/comet/SatelliteMeteorology/GOE... No composition required.