https://cxc.cfa.harvard.edu/mta/MSID_Trends/Obaheaters/Oobthr12/oobthr12_mid_long_sun_angle.html
OOBTHR12 vs Sun Angle
vssunangle
https://cxc.cfa.harvard.edu/mta/MSID_Trends/Obaheaters/Oobthr12/oobthr12_max_long_sun_angle.html
OOBTHR12 vs Sun Angle
vssunangle