FLAASH is not designed to be used with single-band imagery. I am curious to know more about why you are interested in converting a panchromatic image to surface reflectance? Right now, to get FLAASH to correct your pan image, you could try adding another band to it (for example, just repeating the same pan band as two separate bands), then create a spectral filter function file for those bands to use with FLAASH. - Peg Exelis VIS

FLAASH and Quac are both spectral processes so you need more than a single band to correct them with those methods. You might try stacking the pan band with the WV-2 data. I would stack the pan band to be first, followed by the 8 multispectral bands. Then in the Multispectral Settings, there is a dialog that points to the WV-2 filter function. Set the filter index to the 0 position (first band) so that it uses the pan filter function as well.

Thank you for the suggestions. I'm working with the identification of materials in urban environment and I need hold a selection of attributes to identify which channels contribute better to such identification. I need to enter with all of the bands in surface reflectance (the eight multispectral and panchromatic WV-2, in addition to 357 channels of an airborne hyperspectral sensor). In this moment just lack accomplish the transformation to surface reflectance for the panchromatic channel WV-2. I've tried the two suggestions above, but in both cases I'm encounter the following error:Problem: The FLAASH program exited with the following erros: ACC error: avrd: IDL error: Unable to allocate memory: to make array Not enough space ACC_AVRD ACC_HYPER2 ACC_ACC ENVI_ACC_EVENT ENVI_FLAASH_PROCESS_MANAGER IDLRTMAIN $MAIN$

Problem solved Changing tiled to 100Mb in the Advanced Settings the Flaash running and now I have the panchromatic band surface reflectance. Thank you