PlateSolve Coordinates

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smithn00
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PlateSolve Coordinates

Post by smithn00 » Tue May 12, 2020 11:39 pm

Are the coordinates presented by the PlateSolve function J2000 or JNow.

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admin
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Re: PlateSolve Coordinates

Post by admin » Wed May 13, 2020 6:21 pm

Hi,

The astrometry.net based plate solving applications (AstroTortilla, Ansvr, etc) all give results in J2000. I presume Astap does the same.

If you use the plate solve functionality from the tools menu then the results are displayed in J 2000 coordinates (and in fact it includes J2000 in the message that is shown)

If you use the plate solve functionality from the mount control area, then SharpCap will automatically convert the results to JNOW if you're Ascom driver reports that it uses the JNOW coordinate system. Note that in this case also the message shown should include the coordinate system as either J2000 or JNOW. If you are not seeing that in the message then you may be using out of date version of SharpCap.

Cheers, Robin

smithn00
Posts: 48
Joined: Fri Jan 04, 2019 2:29 pm

Re: PlateSolve Coordinates

Post by smithn00 » Sat May 16, 2020 2:57 pm

I have the latest version of SC. I don't see a reference to the coordinate system in either display of the solved RA/Dec.

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Re: PlateSolve Coordinates

Post by admin » Sat May 16, 2020 3:14 pm

Hi,

This is what you should see from plate solving from the tools menu
Capture.PNG
Capture.PNG (158.38 KiB) Viewed 234 times
And this one from plate solving from the mount control ( although you have to watch for it as it will be replaced quite quickly by another message telling you that the mount has been to the new position)
capture2.PNG
capture2.PNG (107.92 KiB) Viewed 234 times
And if you look in the log you will see something like this

Code: Select all

Info:	16:11:35.5927878 Thread:#1 SharpCap.ViewModels.PlateSolveAndResync+<>c__DisplayClass7_0.<SolveAndSync>b__2(Object s, SolveProgressEventArgs a) :: Plate solving : Field: /tmp/6f78db2c-afea-4168-a4bb-4c33e3357cec/frame.png
Info:	16:11:35.5927878 Thread:#1 SharpCap.ViewModels.PlateSolveAndResync+<>c__DisplayClass7_0.<SolveAndSync>b__2(Object s, SolveProgressEventArgs a) :: Plate solving : Field center: (RA,Dec) = (83.84, -5.309) deg.
Info:	16:11:35.5927878 Thread:#1 SharpCap.ViewModels.PlateSolveAndResync+<>c__DisplayClass7_0.<SolveAndSync>b__2(Object s, SolveProgressEventArgs a) :: Plate solving : Field center: (RA H:M:S, Dec D:M:S) = (05:35:20.552, -05:18:32.566).
Info:	16:11:35.5927878 Thread:#1 SharpCap.ViewModels.PlateSolveAndResync+<>c__DisplayClass7_0.<SolveAndSync>b__2(Object s, SolveProgressEventArgs a) :: Plate solving : Field size: 1.5514 x 1.13927 degrees
Info:	16:11:35.5927878 Thread:#1 SharpCap.ViewModels.PlateSolveAndResync+<>c__DisplayClass7_0.<SolveAndSync>b__2(Object s, SolveProgressEventArgs a) :: Plate solving : 
Info:	16:11:35.5927878 Thread:#1 SharpCap.ImageProcessing.ExternalPlateSolverBase.ParseOrientationFromWCSData(Dictionary`2 fields) :: Frame Orientation : Up is 87.2 degree E of N
Info:	16:11:35.5947826 Thread:#1 SharpCap.ViewModels.PlateSolveAndResync+<SolveAndSync>d__7.MoveNext() :: Mount reports JNOW, converting results position from RA=05:35:20,Dec=05:18:32S (J2000)
Info:	16:11:35.6267182 Thread:#1 SharpCap.ViewModels.PlateSolveAndResync+<SolveAndSync>d__7.MoveNext() :: Conversion result is RA=05:36:18,Dec=05:17:55S (JNOW)
Info:	16:11:35.6277162 Thread:#1 SharpCap.ViewModels.PlateSolveAndResync+<SolveAndSync>d__7.MoveNext() :: Field solved to RA=05:36:18,Dec=05:17:55S, field Size {Width=1.5514, Height=1.13927}
Info:	16:11:36.6287531 Thread:#1 SharpCap.ViewModels.PlateSolveAndResync+<SolveAndSync>d__7.MoveNext() :: Before Offset mount is at RA=05:29:19,Dec=04:59:59S
Info:	16:11:36.6287531 Thread:#1 SharpCap.ViewModels.PlateSolveAndResync+<SolveAndSync>d__7.MoveNext() :: Offset target calculated to be  RA=05:22:21,Dec=04:42:03S
Info:	16:11:44.7441109 Thread:#1 SharpCap.ViewModels.PlateSolveAndResync+<SolveAndSync>d__7.MoveNext() :: After offset mount is at RA=05:22:23,Dec=04:42:03S
If you aren't seeing that information then do make sure you have the latest SharpCap 3.2 from the download page.

Cheers, Robin

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