CDO

Dear all,
I have gridded extinction coefficient data (model output), and I want to extract the data only along the CALIPSO swath so that I can validate the model extinction coefficient with the CALIPSO-retrieved extinction coefficient. Now, the size of both latitude and longitude of CALIPSO aerosol profile data is 1x781 (i.e., 781 numbers of latitude-longitude pair points). However, the sizes of the latitude and longitude in the model-simulated gridded output are 501x1 and 901x1, respectively. Earlier, I successfully extracted the AOD value from the same model output, but only for a station location (i.e., only a latitude-longitude point) using the following CDO command line:

cdo -remapnn,"lon=67.136_lat=24.946" aod.nc aod_Karachi.nc

But this time I want to extract extinction coefficient data from the same gridded model output, but only along the straight line of 781 latitude-longitude pair points, and then store the data in the new netcdf file (say, aext_extracted.nc). Is there a command line in CDO to perform this operation? Can anyone please guide me to solving this problem? That will be very helpful for me. I am new to CDO, and any help on this will be greatly appreciated. Thank you for your time and consideration.
With regards,
Ankan