Some recently secured results make possible the implementation of a program for direct phase determination first proposed over ten years ago. Application is made to the evaluation of the phases for the estriol structure. The values of 1805 structure invariants, cos (tp~ + ~2+~p3), lead, by means of a novel least-squares technique, to the determination of 103 phases. Employing the tangent formula, these 103 phases are used to obtain the values of the 1023 phases whose corresponding normalized structure factors are not less than unity.

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A new spaceborne sensor monitors Earth's surface temperature at a resolution higher than ever before, providing information on ecosystem responses to changes in water availability and climate stressors.