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ceos-seo / odc-colab

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Sentinel platforms #3

Open sebfoe opened 3 years ago

sebfoe commented 3 years ago

Hello all, the platform naming seems to be confusing in the case of Sentinel satellites. Sentinel-1A and Sentinel-1B are two different platforms, same for 2A and 2B. I my point of view, Sentinel data is produced using platform 1A, 1B and 2A and 2B, while the database uses only the A. Maybe there is only 1A and 2A used? Is it possible to integrate MODIS data as well?

Thank you very much for your work!

Best Sebastian

dlubawy-ama commented 2 years ago

Hi Sebastian, Thank you for the feedback. The database does actually use both A and B platforms for both Sentinel-1 and Sentinel-2. However, this isn't conveyed properly in the name used in our database which was derived from some Earth Engine metadata that only specified 'A' (even though 'B' was in it) at the time of product creation. That has since been fixed on the Earth Engine side so the derivation of platform name from our GEE tools will be updated to reflect that fix. We will also update the existing database in the Colab repo to reflect this as well.

Regarding MODIS, we think it is also a good idea to add a MODIS product at some point and supply an example notebook using that product. However, there are a lot of MODIS collections to choose from on GEE, and we are not sure which would be best to use for this yet. Do you have any suggestions on what may be best for the wider Earth Observation community? Which MODIS collection would also be beneficial for your use case?

sebfoe commented 2 years ago

Hey Andrew, thank you very much for your information! MODIS is the flagship for earth observers (maybe Sentinel 3 in future...) with hundreds of scientific publications. I am working in the topic of vegetation monitoring focusing Europe, .i.e. all VI Products are interesting for me. I also think vegetation monitoring is a important topic during the actual global change. In my case MODA13 and MODQ13 is are the most interesting products. I already tested the solution to with gee_index, very nice! But I have to mention that I started first with the ODC, then with GEE.