Star thermal resistance of object

Symbol
$T_{s}$
Unit
K.m/W
Formulae
$\frac{T_{sa} T_{st}}{N_{c}^{2} N_{sys}^{2} \left(T_{at} + \frac{T_{sa}}{N_{c} N_{sys}} + \frac{T_{st}}{N_{c} N_{sys}}\right)}$
$\theta_{o_{z}}$