temperature_change has definitions from the field of physics
1
[ noun ] (physics) a process whereby the degree of hotness of a body (or medium) changes

Used in print

(Cornell H. Mayer, "Radio Emission of the Moon...)

The ratio of the measured antenna temperature_change during a drift scan across the moon to the average brightness temperature of the moon over the antenna beam ( assuming that the brightness temperature of the sky is negligible ) was found , by graphical integration of the antenna directivity diagram , to be 0.85 .

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