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[Sol 208] PIXL MCC view of the abraded rock surface. Images taken at night, illuminated by LEDs around the instrument's opening.

[Sol 208] PIXL MCC view of the abraded rock surface. Images taken at night, illuminated by LEDs around the instrument's opening.

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Pyrhan

I presume each image is illuminated at a different wavelength?


paulhammond5155

**Your presumption appears well founded:** :) The MCC camera uses flood light illuminators (FLIs) and structured light illuminators (SLIs), * The FLI consist of an array of 24 LEDs with four channels (red, 735 nm; green, 530 nm; blue, 450 nm, and ultraviolet, 385 nm). Each LED colour channel can be turned on individually to provide monochrome illumination or can be combined to provide either white or different combined colours (e.g., red + green). * Two SLIs project infrared laser dots of 3x5 (dense) and 7x7 (sparse) dot patterns, respectively. With synchronized integration of the MCC’s CCD and flashing of a SLI, 3D coordinates of the SLI spots are obtained, providing distance and topography information of the target, accurate to about 50 µm **Multispectral imaging:** Raw monochrome images are captured for each of the four channels and merged into a composed RGB image. Each monochrome image is individually processed for radiometric corrections including flat-fielding and spectral equalization. The radiometric correction requires the 3D position information determined from the MCC-SLIs measurement. [**Source**](https://www.hou.usra.edu/meetings/lpsc2021/pdf/1198.pdf)


CJDAM

**Edit:** [Image with PIXL targets overlay](https://i.imgur.com/3UK2umg.png) ---- [PIXL Instrument](https://mars.nasa.gov/mars2020/spacecraft/instruments/pixl/for-scientists/) ---- #####Abbreviations - Planetary Instrument for X-ray Lithochemistry (PIXL) - Micro Context Camera (MCC) ---- Source Images: [1](https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00208/ids/edr/browse/pixl/PCW_0208_0685431075_000ECM_N007183607687424400710LUJ01_1200.jpg) [2](https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00208/ids/edr/browse/pixl/PCR_0208_0685431128_000ECM_N007183607687424400710LUJ01_1200.jpg) [3](https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00208/ids/edr/browse/pixl/PCG_0208_0685431181_000ECM_N007183607687424400710LUJ01_1200.jpg) [4](https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00208/ids/edr/browse/pixl/PCB_0208_0685431234_000ECM_N007183607687424400710LUJ01_1200.jpg) [5](https://mars.nasa.gov/mars2020-raw-images/pub/ods/surface/sol/00208/ids/edr/browse/pixl/PCU_0208_0685431287_000ECM_N007183607687424400710LUJ01_1200.jpg) These images were acquired on Sep. 20, 2021 (Sol 208) at the local mean solar time range 19:24:43 - 19:28:09.