Ignore-O-Sphere

The Silicon Graybeard reports on a new atmosphere research project:

There's an area of the atmosphere that's almost impossible to observe regularly.  At roughly 20 to 60 miles, it's too high for balloons or regular aircraft, while being much (much!) too low for satellites to survive. A New Zealand startup company called Dawn Aerospace is working to improve access to what has been called the ignore-o-sphere.  They're prototyping a series of rocket-powered spaceplanes that are intended to fly research payloads into this height range multiple times a day.

From Wikipedia's article about the atmosphere:

The mesosphere ranges from 30 to 50 miles, and is the layer wherein most meteors are incinerated before reaching the surface.