add transmission script
friday notebook
satellite flux solution
fix imports and units
layer calcs
monday oct 20 code
equilibrium problem
add sounder example
change planck
friday diff_toa checkin
revert planck.py
add docstring
add brightness temperature script
add new bright script
add test for planck function
new test code
bright_lapse_toa.py
revert planck.py
add docstring
update planck.py