Instead,
they measure microwave emissions.
All these sensors make measurements at critical frequencies at and above 85 gigahertz (GHz); sensors
measure microwave emissions at 183 GHz, the signature frequency band emitted by water vapor, making it feasible to detect frozen hydrometeors (snow, ice, and the like) in the atmosphere.
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).
GRACE isn't
measuring microwave emissions.
«Satellites are not a thermometer in space, they're not making direct measurements of atmospheric temperature, they're
measuring the microwave emissions from oxygen molecules,» Santer said.
Not exact matches
To
measure the
emission and absorption of
microwaves in the pressure vessels, Steffes and his team use a deceptively simple apparatus — basically a tin can with two wires stuck in one end.
«The
Microwave Limb Sounder (MLS) experiments measure naturally - occurring microwave thermal emission from the limb (edge) of Earth's atmosphere to remotely sense vertical profiles of atmospheric gases, temperature, pressure, and c
Microwave Limb Sounder (MLS) experiments
measure naturally - occurring
microwave thermal emission from the limb (edge) of Earth's atmosphere to remotely sense vertical profiles of atmospheric gases, temperature, pressure, and c
microwave thermal
emission from the limb (edge) of Earth's atmosphere to remotely sense vertical profiles of atmospheric gases, temperature, pressure, and cloud ice.
The instrument
measures naturally occurring
microwave thermal
emission from the edge of Earth's atmosphere to remotely sense vertical profiles of atmospheric gases, temperature, pressure and cloud ice.