- This is where you can buy Terra (inc. ASTER and MISR), Earthsat orthorectified Landsat data and much, much more. To view ASTER and MISR you need to be able to read the .hdf file format. Most image processing software (e.g. Ermapper, Envi) can now handle this file format. However, there are also some specialised HDF tools (see the section below). The Earthsat stuff is very good value at only $50 per scene!