Pol mode sat spot flux measurement needs different configuration at different bands

geminiplanetimager / gpi_pipeline

Gemini Planet Imager Data Reduction Pipeline

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Pol mode sat spot flux measurement needs different configuration at different bands #98

Closed dsavransky closed 5 years ago

dsavransky commented 7 years ago

In particular, the apodizer grids for each band are not aligned perfectly. This might not have been a problem this last run, but for older J band data at least, which was taken with the J-apodizer, the sat spots are rotated about 4-5 degrees from H band. Currently, only the H band positions are hard coded into the primitive. For each apodizer, a different rotation angle should be defined to account for sat spot rotation.

mperrin commented 7 years ago

Really this should be tagged to Sebastian but I don't think he is on github yet

semaphoreP commented 7 years ago

Pauline has also been working on this so I've added her

mperrin commented 7 years ago

Legacy issue migrated from redmine issue tracker. Originally filed by @semaphoreP on 2016-04-01

tmesposito commented 5 years ago

I've updated the gpi_measure_satellite_spot_flux_pol primitive to better align the flux measurement apertures with the satellite spots. They were previously several pixels off in X and Y, especially for non-H band. The primitive now does the following:

Locates sat spots at the correct radial separation in lambda/D for a given apodizer. Based on diffractive grid spacing quoted in Dropbox instrument doc GPI_AMNH_FinalDeliveryBRO.pdf.
Locates sat spots at the correct angles for a given apodizer (aligned by eye).
Offers option to use 2nd order sat spots for Y and J band.