filename = 'AIRS.2003.09.05.035.L1B.AIRS_Rad.v3.1.9.0.N03248031020.hdf';
swathname = 'L1B_AIRS_Science';
fileid = hdfsw('open','AIRS.2003.09.05.035.L1B.AIRS_Rad.v3.1.9.0.N03248031020.hd
f','read');
swathid = hdfsw('attach',fileid,swathname);
[ndims,dimname,dims] = hdfsw('inqdims',swathid);
[NFLDS,FIELDLIST,RANK,NTYPE] = hdfsw('inqdatafields',swathid);
[DATA,STATUS] = hdfsw('readfield',swathid,'radiances',[],[],[]);