Am trying to get the distance constraint of my DNA molecule, so getting the intensity of my cross peak and diagonal peak will allow me calculate the ratio of the intensity. And if you have program in mind please let me know how to get it.Thanks.
NMRFAM-SPARKY (http://www.nmrfam.wisc.edu/nmrfam-sparky-distribution.htm) has the functionality to generate for both XPLOR/CNS (two-letter-code: xf) originated from SPARKY and CYANA/DYANA/PONDEROSA formatted distance constraint (two-letter-code: gd). However, the two-letter-code: gd is for 3D-NOESY and proteins so yo must generate XPLOR/CNS format files and convert them to other formats if you need to.