Hello, i am making a tool in python for get and process the data from ASAR level 0 products of ENVISAT.
Actually, I can extract the MPH, SPH and DSDs from the files, but I have doubst with the MDS. Yes, in handbook explain a bit the structure (in 2.5.2), in Volumen 6 also explain (with less information) the MDS Structure. But is not clear (for me) what is the format of the bits? float, double, int? how can i get de raw data for decompressing and after that focalized with Range-Doppler and Omega-K algorithm?
Where can I get the “Document A-1” for a detailed description of Instrument Source Packets?
Can anyoine help me with this? give me some information or help to how to start?
And if is no much ask, also for understand better de decoding process of the data with FBAQ-4 (for image mode)
Thank you, i hope someone can help me with this =(
Hello, thanks for answer. Yes, I saw the volumen 8 specification product but this explain in details the processed products (level 1b and level 2), but level 0 product is very superficial. I also read volumen 6 “level 0 product specification” and there, they explain better this product but I don’t understand the structure of the MDS. How can I capture this data? The header and sub header of MDS? They don’t detail if the information is char, double, float. Anyone know how to take this data? For be decoding with FBAQ algorithm later?
Hello, thank you for answer again, I saw the table that you show me, but this is for an auxiliary data file. I think i dont explained well, i will try again.
I try to get the raw data of the lvl 0 products for later precess the data with focalization algorithm, but i dont understand well the MDS format of the product. Here a picture of the MDS Structure:
The “Anotations” of the MDS are well explained, also we can see the FEP anotation detailed in the same document.
In handbook, they explain a little the istrument source packet (section 2.5.2)., but they explain basically the Packet Identification" of the Packet Header. and the show this table:
