This item will show an application of the 89 GHz passive microwave channel, using GCOM's AMSR2 instrument as our data source, and a recent hurricane as our case.The 89 GHz channel is especially useful because it can see through clouds and detects the presence of precipitation-sized ice, and therefore convective activity, in the cloud. In this Brief, we will talk about the difference between the vertical and horizontal polarizations of the 89 GHz channels, and when to use each. We will also use these datasets to discriminate between the sea surface, rain, and convective activity in our example.