Hi all, i have been using IDL to batch process AVHRR data however i have come across a problem... more recent data includes the NOAA-19 version of the AVHRR sensor. IDL fails to process imagery from this particular sensor as it does not recognise the AVHRR satellite ID. I tired to 'manually' process the same scenes in ENVI but come across the same error as the only sensors available to choose from range from NOAA-12 to NOAA-18. As a quick fix i have just used the calibration parameters from NOAA-18, something i am not entirely comfortable doing! has anyone come across similar problems? i am running ENVI 4.6.1 and imagine a newer version of ENVI is up to date with the NOAA satellites but wanted to avoid updating my software. thanks for any help, Drew