DETECTION OF MOISTURE AND MOISTURE RELATED PHENOMENA FROM SKYLAB MONTHLY PROGRESS REPORT, Mar. 1974

摘要

Soil moisture and precipitation variations were not detectable as tonal variations on the S 190 A 1R B & W photography. Some light tonal areas contained high precipitation .83 inches and high moisture content 21.1% while other light tonal areas contained only .02 inches precipitation and as little as 0.7% moisture. Similar variations were observed in dark tonal areas. This inconsistency may be caused by a lapse of 3 to 4 days from the time precipitation occurred until the photographs were taken and the fact that in the first inch of soil the measured soil moisture was generally less than 5.0%.