USGS and NASA engineers were able to alter the normal operating procedures for the L5 back-up solar array drive, enabling the array to provide adequate power for the mission to resume.
Official USGS Press Release.

Above the Earth, Below the Surface: Landsat’s Role in Monitoring Water Quality
Safeguarding freshwater resources is crucial, and while scientists use a variety of ground-based techniques to gauge water quality, the Landsat program has provided water quality data from orbit for decades.