#25jun22 tsys fit to crosses. (Tcmb=2.725,TatmFixed=270.)
#        tsys=Tconst + Tatm*(1-exp(-tau*sec(za))) +Tcmb*(-tau*sec(za))
# freqMhz  Tconst Tatm        tau   sigfitDegK
!2022  176
8223.0    89.6512 270.0000  0.01717  1.82
8363.0    86.6910 270.0000  0.01782  1.85
8505.0    87.2566 270.0000  0.01776  1.86
8647.0    86.9394 270.0000  0.01761  1.90
8789.0    87.6435 270.0000  0.01853  1.99
8931.0    93.8917 270.0000  0.01799  2.07
9073.0    92.3114 270.0000  0.01896  2.22