DRL software has been archived 🙁 and is only available upon request by users who have previously downloaded it. Some exceptions are possible. To request this software send an email to the DRL email list (which, if you have downloaded software from here before, you are a member of).
AIRS processes downlinked data from the AIRS, AMSU-A and HSB instruments on the Aqua spacecraft from RAW packets in PDS format to Level 1-B calibrated radiances.