Recent updates to Noise Figure Y factor method calculator expose the temperature of each of the attenuators in each scenario and so allow more flexibility in application to real world problems.
The screenshot above demonstrates its use where the DUT and Att12 are cryogenically cooled.
For most applications, the default value of 290K is appropriate, so though the form has a few more fields, there isn’t more data entry for most usage.
The calcs have not changed, just replacement of a global Tatt with T for each instance. The input form and output form have been reformatted to suit.