more explanation needed

[justinljw]

Hello, I'm using this project to get 3d (vector) displacements from unwrapped insar data (ALOS2 and sentinel1). Could someone explain the LOS file needed in this codes (like which los file)? And, I also would like to know the meaning of the output files and how to use them. Any help will be welcome, thank you!

[bminchew]

Hi Justin, The LOS file needs to be a bit-interleaved, single-precision binary file that gives the satellite-to-ground line-of-sight (LOS) vector defined in east-north-up (ENU) coordinates (and in that order in the interleaving). For example, the first data point in the LOS file should be the east component of the LOS unit vector that corresponds to the first pixel in the interferogram. The second (third) data point in the LOS file should be the north (up) component of the LOS unit vector that corresponds to the first pixel in the interferogram. And so on. The code always outputs the velocity vector in ENU coordinates. Explanations for most of the optional outputs can be found in Minchew et al. (2015) <https://www.cambridge.org/core/services/aop-cambridge-core/content/view/12F03B28D8FF528A1EF6D148A7D43AC4/S0022143000202293a.pdf/early_melt_season_velocity_fields_of_langjokull_and_hofsjokull_central_iceland.pdf>, as well as in Minchew et al. (2017) <https://glaciers.mit.edu/sites/default/files/documents/minchew_etal_jgr2017_main.pdf>. vector_disp is a special case of the method described by Minchew et al. (2015), where kappa = 0. The W referenced in the vector_disp command file is equal to C_d^{-1}. I hope that helps.

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--Brent

On Thu, Jun 21, 2018 at 3:27 AM, Justin ***@***.***> wrote: Hello, I'm using this project to get 3d (vector) displacements from unwrapped insar data (ALOS2 and sentinel1). Could someone explain the LOS file needed in this codes (like which los file)? And, I also would like to know the meaning of the output files and how to use them. Any help will be welcome, thank you! — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#1>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AGEy7csz4kzSus6WkQ8towcJkMJ7B1UTks5t-0rzgaJpZM4UxiK2> .

[justinljw]

This helps a lot, thank you!