This year at the ESSL Testbed we are testing an improved version of the Nowcast-SAT Aviation product. The developers at DWD took recommendations that came out of the testbed in 2018 into account, like a colour shading according to the hight of cloud tops in flight levels. We are interested to see how well the new version will perform.
![](https://www.essl.org/testbed/blog/wp-content/uploads/2019/07/20190702-NC-SAT-aviation-example-screenshot-1024x468.png)
Blue colour shading denotes areas above FL400, magenta between FL350 and FL400.