{single}{actor}{/single}{multiple}{actors}{/multiple} replied to the...

Hi Rob,

I finally had a chance to do some testing with StellarSolver. I'm running a build from kstars commit 15ba3c90a1ec4724a28b43cfa69fa1fb6693242a and SS commit b8ce7148a1bad6f9dd4f5d8b4c4ef95396db4a3c.

I had been using ASTAP. I switched the solving method to "Internal solver" and left all settings as-is. I then ran Load and Slew and it just worked out of the box - no problems, generally. However, I did find a failure case that I'll share here.

BTW - when testing with the simulators I left the Solver Action as "Nothing" but the slew still occurred. Also, after the unwanted slew, the Load and Slew button was now greyed out. To recover it I had to stop/start the indi services.

The following image solves with no problem, even though the image has some problems including mystery stars.

https://www.dropbox.com/s/20kh08zb0xhc1y5/ic63_Light_L_900_secs_2020-10-18T21-35-21_001.fits?dl=0

This one works as well, without the mystery stars:

https://www.dropbox.com/s/4lx6wqjxu40lll6/ic63_Light_L_900_secs_2020-10-18T21-52-38_002.fits?dl=0

However, this one of the same field does not solve. The main differences I can determine is the median signal of this frame is higher than the other two and the image is rotated 180deg from the others.

https://www.dropbox.com/s/cfxuw6xdln8qjc5/ic63_Light_L_900_secs_2020-10-20T05-10-04_040.fits?dl=0

I've attached the log file with Alignment logging turned on. Also, below is from the log window on the alignment tab. Interesting that it says it needs 19.7GB of RAM. Is that true?

Greg

2020-10-22T09:40:09 Solver Failed
2020-10-22T09:40:09 internal pixel buffer full
2020-10-22T09:40:00 Starting Internal StellarSolver Sextractor. . .
2020-10-22T09:40:00 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2020-10-22T09:40:00 There should be enough RAM to load the indexes in parallel.
2020-10-22T09:40:00 Evaluating Installed RAM for inParallel Option.  Total Size of Index files: 19.7149 GB, Installed RAM: 31.2902 GB
2020-10-22T09:39:35 Solver Failed
2020-10-22T09:39:35 Solver was aborted, timed out, or failed, so no solution was found
2020-10-22T09:39:35 Starting Internal StellarSolver Astrometry.net based Engine. . .
2020-10-22T09:39:35 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2020-10-22T09:39:35 Image width 640 pixels; arcsec per pixel range 0.93949 1.76154

2020-10-22T09:39:35 Scale range: 10.0212 to 18.7898 arcmin wide

2020-10-22T09:39:35 Set odds ratio to solve to 1e+9 (log = 20.7233)

2020-10-22T09:39:34 Configuring StellarSolver
2020-10-22T09:39:34 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2020-10-22T09:39:34 Starting Internal StellarSolver Sextractor. . .
2020-10-22T09:39:34 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2020-10-22T09:39:34 There should be enough RAM to load the indexes in parallel.
2020-10-22T09:39:34 Evaluating Installed RAM for inParallel Option.  Total Size of Index files: 19.7149 GB, Installed RAM: 31.2902 GB
2020-10-22T09:39:34 Image received.
2020-10-22T09:39:29 Capturing image...
2020-10-22T09:39:23 Slewing to target coordinates: RA (00h 59m 30s) DEC ( 61° 05' 18").
2020-10-22T09:39:23 Solution coordinates: RA (00h 59m 30s) DEC ( 61° 05' 18") Telescope Coordinates: RA (12h 45m 39s) DEC ( 90° 00' 00")
2020-10-22T09:39:23 WCS information updated. Images captured from this point forward shall have valid WCS.
2020-10-22T09:39:23 Solver RA (14.55265) DEC (60.97575) Orientation (0.22974) Pixel Scale (0.73429)
2020-10-22T09:39:23 Field parity: pos

2020-10-22T09:39:23 Field rotation angle: up is 0.229738 degrees E of N
2020-10-22T09:39:23 Pixel Scale: 0.734292"
2020-10-22T09:39:23 Field size: 55.0635 x 44.0628 arcminutes
2020-10-22T09:39:23 Field is: (-196.752, 50.8996) deg from search coords.
2020-10-22T09:39:23 Field center: (RA H:M:S, Dec D:M:S) = (00:58:12.637, +60:58:32.700).
2020-10-22T09:39:23 Field center: (RA,Dec) = (14.5527, 60.9758) deg.
2020-10-22T09:39:23 Solved with index:  4109
2020-10-22T09:39:23 Number of Matches:  11
2020-10-22T09:39:23 Solve Log Odds:  72.9335
2020-10-22T09:39:23 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2020-10-22T09:39:22 Starting Internal StellarSolver Astrometry.net based Engine. . .
2020-10-22T09:39:22 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2020-10-22T09:39:22 Scale range: 0.582152 to 0.873228 arcsec/pixel

2020-10-22T09:39:22 Set odds ratio to solve to 1e+9 (log = 20.7233)

2020-10-22T09:39:22 Configuring StellarSolver
2020-10-22T09:39:22 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2020-10-22T09:39:22 Stars Found after Filtering: 50
2020-10-22T09:39:22 Keeping just the 50 brightest stars
2020-10-22T09:39:22 Removing the stars with a/b ratios greater than 1.5
2020-10-22T09:39:22 Stars Found before Filtering: 20397
2020-10-22T09:39:18 Starting Internal StellarSolver Sextractor. . .
2020-10-22T09:39:18 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2020-10-22T09:39:18 There should be enough RAM to load the indexes in parallel.
2020-10-22T09:39:18 Evaluating Installed RAM for inParallel Option.  Total Size of Index files: 19.7149 GB, Installed RAM: 31.2902 GB
2020-10-22T09:38:29 World Coordinate System (WCS) is enabled. CCD rotation must be set either manually in the CCD driver or by solving an image before proceeding to capture any further images, otherwise the WCS information may be invalid.
2020-10-22T09:38:29 Idle.