Microwave sensor will send high frequency micro waves in area and will check for their reflected patterns.

Microwave sensor has high sensitivity as well as detection range compared to above sensors.

To satellite microwave sensors, surface melt appears to be open water rather than water on top of sea ice.

In the latter technique, performance generally improves in powders and low dielectric media that are not good reflectors of electromagnetic energy transmitted through a void (as in non-contact microwave sensors).