View Issue Details
ID | Project | Category | View Status | Date Submitted | Last Update |
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0002285 | SkyChart | 1-Software | public | 20-02-09 20:11 | 20-02-12 15:24 |
Reporter | Bernard Pidoux | Assigned To | Patrick Chevalley | ||
Priority | normal | Severity | minor | Reproducibility | N/A |
Status | assigned | Resolution | open | ||
Platform | PC | OS | Windows | OS Version | 10 64bit |
Product Version | 4.3 beta | ||||
Target Version | 4.4 | ||||
Summary | 0002285: Would like to display LHA | ||||
Description | Hi Patrick, This is not a bug report but rather a request. I have already reported to you the successful use of Skycharts with our Radiotelescope at la Villette, in Paris, France. The equatorial instrument has a limited domain of observation. It is by construction limited between RA +/- 4h, i.e. 60° East and 60° West and between -20° and +60° for DEC. If we choose a target outside this domain, then the software driver will refuse to trigger a motor activation. By the way, we are using INDI API. You certainly remember that I reported that Skycharts version 4.2 would then disconnect in that case. You solved the issue. What we would like is Skycharts to display LHA in order to let us know if a star or target is within the observable domain at the time of observation by the Radio Telescope. Best regards, Bernard https://radiotelescopelavillette.wordpress.com/photos/stars-song-le-chant-des-etoiles/ | ||||
Tags | No tags attached. | ||||
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Bernard, Yes this is possible. At the moment the hour angle is show in the detailed information in the section "Visibility for your observatory", this is not very convenient for your use. Maybe I can add it in the bottom box next to the Rise/Set information when you click an object? Do this work for you? It is also possible to make a custom horizon file to mark the area you can use on the chart. I quickly make one using your information but sure this can be improved. See attached screenshot and horizon file. To load the file in Skychart, open the Observatory setting, at the Horizon tab check "Display local horizon line" and select the attached file hrz.txt . |
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Hi Patrick, Many thanks for your proposals. We appreciate very much. The horizon line to mark the area is a very good idea. You propose to add Local Hour Angle in the bottom box next to the Rise/Set information when you click an object? I noticed that when moving the mouse over the sky, four different informations are displayed : Az, Alt and on next line AD and DE. When Clicking into an object more informations are displayed that disappear if clicking outside of a star. It maybe interesting to display LHA already when moving the mouse. This added to your horizon line would help and also at the end of second line when clicking an object. Cordially, Bernard |
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Hi Patrick, I checked your horizon line sample you sent me. It is exactly performing as we needed. Thank you for the screen copy you provided. Could you explain the options to validate for I only obtain a blank sky outside of the "horizon" and not the enhanced view inside the "horizon" you have shown ? The LHA display is perfect on your beta version you provided. Many thanks for your fast reactivity and for you disponibility. I appreciate very much. Regards, Bernard |
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Bernard, I am glad the new LHA display work for you. I include a screenshot of the options to reproduce the same display as in my previous screenshot. When you refine the horizon file, be careful the first column with the azimuth is an integer value, this is because the program use a table with 360 entries to store the horizon data. The elevation can be a decimal value. |
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I forget to mention another option that can be useful for you. If you check the option "Compute rise/set time relative to this line" visible in the previous screenshot, the rise and set time show at the bottom of the screen when you click an object are the time this object enter and exit the observing window of your instrument. |
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Hi Patrick, Thank you for mentioning the rise/set time. This is also a very convenient feature. I am curious of how you filled the horizon table for displaying our instrument observation domain. Is there any formula to compute it from our instrument specs or did you note Az/Alt by hand following the sky map ? Bernard |
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I do this first file by moving the mouse on the chart along the RA and DEC lines, and take note of the alt/az position. I not have a function to compute the elevation at the intersection of a given azimuth and a hour angle or declination line. But if you not find another solution I can probably do a small program to do that. |
Date Modified | Username | Field | Change |
---|---|---|---|
20-02-09 20:11 | Bernard Pidoux | New Issue | |
20-02-09 22:05 | Patrick Chevalley | File Added: fenetre.png | |
20-02-09 22:05 | Patrick Chevalley | File Added: hrz.txt | |
20-02-09 22:05 | Patrick Chevalley | Note Added: 0006324 | |
20-02-09 22:06 | Patrick Chevalley | Assigned To | => Patrick Chevalley |
20-02-09 22:06 | Patrick Chevalley | Status | new => feedback |
20-02-09 22:06 | Patrick Chevalley | Target Version | => 4.4 |
20-02-11 20:13 | Bernard Pidoux | Note Added: 0006325 | |
20-02-11 20:13 | Bernard Pidoux | Status | feedback => assigned |
20-02-11 20:20 | Bernard Pidoux | Note Added: 0006326 | |
20-02-12 09:31 | Patrick Chevalley | File Added: horizon_setting.png | |
20-02-12 09:31 | Patrick Chevalley | Note Added: 0006328 | |
20-02-12 09:38 | Patrick Chevalley | Note Added: 0006329 | |
20-02-12 11:18 | Bernard Pidoux | Note Added: 0006330 | |
20-02-12 15:24 | Patrick Chevalley | Note Added: 0006331 |