Skip to content

Optimal parameters to get the best results (advice needed) #91

@toshaklg

Description

@toshaklg

Hello! I am trying to familiarize myself with MAJA and I want to ask some questions, if you don't mind.
I might confuse some terms, but I hope I explain it clearly.

  1. As far as I understand MAJA is supposed to process a time-series data, so it doesn't really make sense to run it with just one image which result in the end will be of "inferior quality". Therefore, I wonder what is the most appropriate size of a time-series (number of images) to get the most accurate results?

  2. Judging by the documentation, the "nominal" run will process the first image in "init" mode which means that L2 for the very first entry won't be the best quality. If I process the same time series in "backwards" mode, it will increase the quality of the first result, but does it affect other L2 images anyhow?

  3. How can I make startmaja run in a backward mode? Looks like --nbackward 1 is right command, is it?

  4. I noticed that in my previous ticket I had the following workplans:

2021-04-20 16:04:00,429 [INFO ] 5 workplan(s) successfully created:
DATE | TILE | MODE | L1-PRODUCT | ADDITIONAL INFO
2017-01-03 10:44:32 | 31TFJ | INIT | S2A_MSIL1C_20170103T104432_N0204_R008_T31TFJ_20170103T104428.SAFE | Init mode - No previous L2
2017-01-10 10:34:11 | 31TFJ | NOMINAL | S2A_MSIL1C_20170110T103411_N0204_R108_T31TFJ_20170110T103407.SAFE | L2 from previous
2017-01-13 10:44:01 | 31TFJ | NOMINAL | S2A_MSIL1C_20170113T104401_N0204_R008_T31TFJ_20170113T104402.SAFE | L2 from previous
2017-01-30 10:32:51 | 31TFJ | NOMINAL | S2A_MSIL1C_20170130T103251_N0204_R108_T31TFJ_20170130T103249.SAFE | L2 from previous
2017-03-14 10:40:11 | 31TFJ | INIT | S2A_MSIL1C_20170314T104011_N0204_R008_T31TFJ_20170314T104411.SAFE | Init mode - No previous L2
Press Enter to continue...

What I am confused with is that the last image is going to be processed in the "INIT" mode, so I wonder why? Am I missing something? I was expecting that "nominal" mode will process only the first image in "INIT" and all others in "NOMINAL", no?

I am looking forward to your replies,
thanks!

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions