The satellite data have much better global coverage than surface thermometer compilations of the global average temperature. Satellite data require very little infilling (guessing temperatures for areas without thermometers. The greenhouse gas effect takes place in the troposphere where the satellites measure. But satellite data had always measured less global warming than surface thermometers, so they were ignored by climate alarmists. Until the RSS compilation relented in 2015 and made a huge warming adjustment to match the surface numbers, in an effort to become more popular = junk science. The UAH satellite data was not corrupted by this popularity contest. A comparison of one land compilation (HadCRUT - British) and the UAH satellite compilation of the global average temperature, by latitude, is in the last chart.
