Projection of Liine-of-Sight (LoS) displacement to the downslope component.

[ashokdahal]

Description of the desired feature
I, together with @alhandwerger and @ EJFielding, would like to request a feature on MintPy to project LoS displacement onto the slope component, as many researchers working on the hillslope deformation field prefer to work with a downslope component instead of LoS displacement. The prescribed method for this is quite simple and is well established, Similar to asc_desc2horz_vert, the LoS displacement can be projected towards the hillslope using methods such as Handwerger et al. (2019).

Describe the solution you'd like
We would like to have a simple mintpy cli tool / function which works in similar way to asc_desc2horz_vert.py and projects LoS displacement onto downslope component.

Additional context
We have already developed the required tool and would like to share it with the community.

Are you willing to help implement and maintain this feature?
Yes.

[welcome]

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