You searched for: backradiation (Engelska - Tjeckiska)

that's because that's the direction in which backradiation is generally the least.
that is ... interesting.

as such, i would suspect the issue is not with either power transistors, their heat sinks, or observed longwave ir backradiation.
as such, i would suspect the issue is not with either power transistors, their heat sinks, or observed longwave ir backradiation.

we can, when standing at the earth surface, empirically measure longwave ir backradiation from the atmosphere, and there are posts on this site and elsewhere documenting this.
we can, when standing at the earth surface, empirically measure longwave ir backradiation from the atmosphere, and there are posts on this site and elsewhere documenting this.

now, 333 w/m^2 comes back down from the atmosphere as backradiation, along with 161 w/m^2 from the sun, but given that all incoming energy becomes surface temperature, you can't just difference the ir flows.
now, 333 w/m^2 comes back down from the atmosphere as backradiation, along with 161 w/m^2 from the sun, but given that all incoming energy becomes surface temperature, you can't just difference the ir flows.