Again...absolute failure to grasp a basic concept...if no spectrum canbe measured by an uncooled instrument pointing at open sky, it is because no energy is entering the instrument to be measured...if no energy is entering the uncooled instrument, what, exactly, beyond unobservable, unmeasurable, untestable models makes you think that the energy you are talking about is striking the uncooled surface of the earth?
The fact that no spectrum is being measured by the uncooled instrument is observable, measurable, testable evidence that back radiation is not hitting the surface of the earth. You deny what you can see and measure in favor of models that can neither be observed, measured, or tested. What does that say to the credibility of anything you might have to say on the topic of energy movement.
It seems that you are saying "screw what the instruments show...this is what the models say."
Does that about sum up your position?