Hi Yarrow, XDS does the following: Data is divided into resolution shells and a straight line A - 2*B*SS is fitted to log(<I>), where SS = mean of (sin(THETA)/LAMBDA)**2 in shell <I> = mean reflection intensity in shell BO = (A - log<I>)/(2*SS)
The value of B is reported (above the table) for all data, and additionally (in the table) for each resolution shell. best, Kay
