One of the advantages of working in Remote Sensing is that many satellite or model data sources exist and are freely available for scientific purpouses. Specially, if you work with NASA’ s satellites, data is totally free, and the acces to download it is easy. Probably, if you are interested on ESA’s data I suposse you will have to be endorsed in a scientific project… It is not so straightforward 😦 !
However, there are many other european data sources that can be very interesting too. ECMWF offers a free dataset from reanalyses models that have a global coverture and offers a large temporal serie.
I nearly use these external satellite data (one of my research topics is focuss on simulation) so I only visit a few websites. If you know more interesting pages to download data, please post it here !! 🙂 Thanks!!
Google Earth Engine
This new API from google is still in beta version, but I believe it will mark the remote sensig futute trend. With this new tool, you can easily have acces to a large temporal series of the most important satellite data such as Landsat family, MODIS, AVHRR, SRTM, NOAA data…etc. One of the novelties is that you work on the cloud, it is not necessary to download the images you need, you can directly work with them apply the default algorithms available or develop yours (Python). I believe it is very useful specially for temporal series or to find trends.
If you want to use it, you must first register in the following link
To see a official video which give you a deep introduction of the tool possibilities follow this link…
Fianally, this is the link of the main website. I recommend you to visiti it!
This software has been designed to download georeferenced Google Earth images. I have never use it, but it seems useful!