Contains:  Solar system body or event

Image of the day 01/31/2023

    New approach software derotation of the ISS captured on an alt-az mount, Khisamutdinov Maksim

    New approach software derotation of the ISS captured on an alt-az mount

    Acquisition type: Lucky imaging

    Image of the day 01/31/2023

      New approach software derotation of the ISS captured on an alt-az mount, Khisamutdinov Maksim

      New approach software derotation of the ISS captured on an alt-az mount

      Acquisition type: Lucky imaging

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      Description

      In continuation of the theme of planet rotation (using the example of Mars), I have finalized the program for working with the ISS. Taking into account the exact time and TLE data of the satellite, it was possible to remove the rotation of the field caused by the use of an alt-azimuth mount and obtain the orientation of the frame as when shooting on an equatorial mount, prepared for a specific ISS trajectory. In addition, now I have accurate data on the range and height of the station above the horizon, as well as its coordinates in the sky, which I plan to use in the future for preliminary guidance mount.

      The animation on the left side of the frame shows the result of shooting the ISS at the alt-azimuthal, and on the right the result of software rotation compensation. Rotation compensation will not only improve the perception of animations of ISS flights, but will also make it possible to add more adjacent frames to increase the SNR of the resulting frames.

      Technical data:Animation of the ISS 28.03.2022 20:32:34 (the beginning of the shooting of the video in local time), height 60 degrees, 60 frames in animation.
      Monty LX200 MadMax. seeing 4/5, transparency 4/5. (1 - bad, 5 - excellent), strong wind - gusts up to 15ms. Meade ACF 16" f/10 tube + Meade zero 2” focuser + 2x barlow (focal length ~8 meters) + playerOne imx429 + zwo EFW mini + Baader LRGB(R). 192fps 640x600, mono12, gain 280, shutter speed 0.9ms. Addition of 35% of 300 frames per second AS!3 with wavelets, 100% of the original – pixel scale 0.11”/pixel.

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        New approach software derotation of the ISS captured on an alt-az mount, Khisamutdinov Maksim
        Original
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        New approach software derotation of the ISS captured on an alt-az mount, Khisamutdinov Maksim
        B

      B

      Description: I found a small mistake in mathematics and the derotation is close to ideal!

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