Climatologist: ‘Satellites have advantage of measuring virtually whole Earth every day with the same instruments…checked against each other’
Three Ways to Measure Global Temperatures The primary ways to monitor global average air temperatures are surface based thermometers (since the late 1800s), radiosondes (weather balloons, since about the 1950s), and satellites measuring microwave emissions (since 1979). Other technologies, such as GPS satellite based methods have limited record length and have not yet gained wide […]