wLat2=0.5 _d 0
wLat2= 1. _d 0 - wLat1
& wTyear1*wLat2*zen_albedo_table(iTyear1,iLat2)+
& wTyear2*wLat2*zen_albedo_table(iTyear2,iLat2)
_RL wLat1,wLat2,wTyear1,wTyear2