For the same reason, measurements will be taken of the Earth's surface under many conditions of light and darkness, hard earth and water, clouds and cloudlessness.
(measurements; will be taken; of the Earth's surface; L:under many conditions of light and darkness, hard earth and water, clouds and cloudlessness)
measurements
will be taken
of the Earth's surface L:under many conditions of light and darkness, hard earth and water, clouds and cloudlessness