help with MaskingCompositor

[EliB]

Good morning, everyone,

sorry for this new request, but I need help in using the MaskingCompositor.

I would to use it to process HRV, IR108, VIS006, WV062 data from MSG (hrit format), and then be able to apply a static background to them.

With Dave's help, I got a quite good product for HRV masked with static background, using the hrv_sever_storm_masked in composites/seviri.yaml as example, but I can't do the same for the other channels.

I don't get any errors in the code, and the static background is correctly showed, but I can't display the clouds the way I need.....in practice I lack an example to start with for the other channels. May anyone guide me in understanding how to set up such a composite?

I also wanted to ask you another question: in the following composite

nwc_geo_ct_masked_ir:

    compositor: !!python/name:satpy.composites.MaskingCompositor

    prerequisites:

    - IR_108

    - ct

    standard_name: nwc_geo_ct_masked_ir

    # Default is opaque (transparency = 0)

    conditions:

      - method: equal

        value: Cloud-free_land

        transparency: 100

      - method: equal

        value: Cloud-free_sea

        transparency: 100

      - method: equal

        value: Snow_over_land

        transparency: 100

      - method: equal

        value: Sea_ice

        transparency: 100

      - method: equal

        value: Fractional_clouds

        transparency: 45

      - method: equal

        value: High_semitransparent_thin_clouds

        transparency: 50

      - method: equal

        value: High_semitransparent_above_snow_ice

        transparency: 60

the MaskinCompositor is used and several values to modulate the transparency are used....where I can find a list of the methods and values (and the meaning of them) I can use? 

I hope someone can help me with this.

thank you all very much

Eliana