 Combining satellite-based passive and active microwave sensors has the potential to improve global scale estimates of surface soil moisture by adjusting them to the same range and preserving their dynamics, resulting in increased spatial coverage and number of observations, particularly for transitional regions. This methodology can be applied to existing and new microwave satellites to develop a long-term global soil moisture dataset that enhances understanding of its role in water, energy, and carbon cycles. This article was authored by Y.Y. Lu, R.M. Paranosa, W.A. Derigo, and others.