via wget tools if you want to download the data file from 1st January 2009, type the command : curl --insecure https://cds-espri.ipsl.fr/iasial2/iasi_cloud/V1.2.0/2009/01/IASI_METOPA_L2_CLOUD_20090102_LMD_V1.2.0.tar -O if you want to download more than one file, type : curl --insecure https://cds-espri.ipsl.fr/iasial2/iasi_cloud/V1.2.0/2009/01/IASI_METOPA_L2_CLOUD_200901[02-03]_LMD_V1.2.0.tar -O