8/3/2023 0 Comments Online astrometryAlternatively, you can use the copy icon to copy the telescope coordinates to the solver options. The Solver's RA & DEC coordinates can be updated automatically whenever the mount successfully completely slewing, if the Update Coordinates After Slew is checked. This can take a lot of time therefore, in order to speed up the solver, you can restrict it to only search within a specified area in the sky designated by the RA, DEC, and Radius options above. Verbose: If checked, display detailed information in the logging window.īy default, the solver will search all over the sky to determine the coordinates of the captured image.Preview: If checked, display captured FITS image in FITSViewer tool.Update Coordinates After Slew: If checked, it will automatically update the RA & DEC values for the solver search pattern whenever the telescope completes a successful slew/track.For more details on the options, please refer to Options: Options that are passed to the solver.Radius: Radius in degrees of the search pattern.DEC: DEC coordinates of the search pattern.RA: RA coordinates of the search pattern.Bin X: Set horizontal binning of the CCD.The alignment options are passed to the solver and Ekos each time an image is captured: It is recommended to use a download manager as such DownThemAll! for Firefox to download the Debian packages as browsers' built-in download manager may have problems with download large packages. On the other hand, if you downloaded the FITS index files directly, copy them to /usr/share/astrometry directory. If you downloaded the Debian Packages above for your FOV range, you can install them from your favorite package manager, or via the following command: The Debian packages are suitable for any Debian-based distribution (Ubuntu, Mint.etc). There are many online tools to calculate FOVs, such as Starizona Field of View Calculator. For example, if your FOV is 60 arcminutes, you need to install index files covering skymarks from 6 arcminutes (10%) to 60 arcminutes (100%). You need to install index files covering 100% to 10% of your FOV. If you are running Ubuntu, you can install it by running the following command:Īfter is installed, you must download and install the necessary index files suitable for your telescope+CCD field of view (FOV). In order to use the offline solver, you must install in addition to the necessary index files. The offline solver can be faster and requires no Internet connection. The online solver requires no configuration, and depending on your Internet bandwidth, it might take a while to upload and solve the image. Most popular commercial telescope nowadays support such commands.įor the Ekos Alignment Module to work, you have an option of either utilizing the online solver, or the offline solver. This will enable the user to adjust the mount until the misalignment is minimized.Īt minimum, you need a CCD/Webcam and a telescope that supports Slew & Sync commands. Ekos can then correct the discrepancy by either syncing to the new coordinates, or by slewing the mount to the desired target originally requested.įurthermore, Ekos can measure the misalignment in the polar axis by taking a couple of images near the meridian and east/west of the meridian. The magnitude of this discrepancy can range from a few arcminutes to a couple of degrees. Often, there is a discrepancy between where the telescope thinks it is looking at and where it is truly pointing. Once the coordinates are determined, the true pointing of the telescope is known. The solver essentially performs a pattern recognition against a catalog of millions of stars. Ekos begins by capturing an image of a star field, feeding that image to solver, and getting the central coordinates (RA, DEC) of the image. Ekos Alignment Module enables highly accurate GOTOs to within sub-arcseconds accuracy and can measure and correct polar alignment errors.
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