GengPeiLin

K2q.m is used for dem error estimation but it's sensor depended ans only supprot ERS/Envisat, ALOS1 and Radarsat-2 U18. And it will assume ERS/Envisat if sensor not specified. `else` `%ERS/ENVISAT`...

In the p25 of the manual, chapter 4.8 does not have a content. > 4.8 Step 8: Atmospheric filtering