Page "learned" Paragraph 9

In the observations at 4.3 mm ( Coates, 1959 ), the diameter of the antenna beam, 6'.7, was small enough to allow resolution of some of the larger features of the lunar surface, and contour diagrams have been made of the lunar brightness distribution at three lunar phases.

These observations indicate that the lunar maria heat up more rapidly and also cool off more rapidly than do the mountainous regions.

Mare Imbrium seems to be an exception and remains cooler than the regions which surround it.

These contour diagrams also suggest a rather rapid falloff in the radio brightness with latitude.