As things heat up they radiate more em energy. It's called blackbody radiation. The Earth's greenhouse effect attenuates this radiation but from the top of the troposphere or thereabouts black body radiation takes over. A hotter Earth then, will radiate more energy into space. You are reporting more radiation from Earth into space.
The inference drawn from your data is the Earth is hotter now than it was some years ago.
Surface measurements confirm this trend.
We call it global warming.
But you don't want to believe even though you just kicked an own goal.
