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08 Apr 2018
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TOPIC: remote solver | unable to solve

remote solver | unable to solve 1 week 1 day ago #27250

Odd that you have been working on the same thing I was. I am setting up a new RPi3 B+, which has been going very nicely. The 5Ghz Wireless support is very nice. Anyhow, I was trying to use Load and Slew to load an image I took in SGP. I grabbed all of the same indexes I use on my ANSVR implementation and grabbed all of the 41xx FITS as well. In testing with nova.astrometry.net, the 4108.fits was used to solve the same image.

broiler.astrometry.net/~dstn/4100/

The remote solver still failed. I noted that an informational message was given saying that PIXSIZE1 was not found in my FITS header. So, I went into Pixinsight, updated the header and added PIXSIZE1 and PIXSIZE2 values to match the pixel size of the camera used to take the image. Once I did that, the solver completed (although it took 45 seconds) and the simulator mount moved to the correct target. The solver also used the 4108.fits file to solve this image.

I then parked the simulator and loaded the same image, but now used ANSVR to solve it. It also completed successfully, and took 19 seconds to solve the image. That makes sense, since my desktop is much more powerful than the RPi3.

Then I loaded the same image (without PIXSIZE1 and PIXSIZE2 in the header) and tried it again. Remote failed, and ANSVR failed.

So I loaded the JPG into SGP, and ANSVR could blind solve it, but it took 100 seconds, and the command passed to ANSVR was identical in SGP and KStars.

Then I loaded the original FITS file into SGP, and ANSVR blind solved it in 6 seconds. Now, SGP read the fits header to get data (even for the blind solve):

exec /usr/bin/solve-field -p -O -U none -B none -R none -M none -N none -C cancel --crpix-center -z 2 -u arcsecperpix -L 4.0528092288503 -H 4.47942072662402 stars.fit

The strange thing is that my pixel scale is not 4 arc seconds per pixel. According to the FITS header of the same image, it is: 1.20455011136108.

SGP is using hints though, and you can see those here (again it is reading those from the FITS header)


In conclusion I think that the solver could be improved to extract more data from the header in order to make solving much easier and faster. How the folks at SGP knew to set app to that value, I have no idea but it sure worked lightning fast. Even though I had app selected in the Ekos options, it seemed to stick to AW (whatever that is).

2018-07-07T16:33:16 Using solver options: -O --no-plots --no-verify --resort --downsample 2 -L 51.3588 -H 94.0029 -u aw
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The following user(s) said Thank You: pug916

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remote solver | unable to solve 1 week 1 day ago #27251

More on this...

So I added: -u arcsecperpix -L 4.0528092288503 -H 4.47942072662402 as a custom value in the solver options and disabled the auto update stuff. Then when I went to solve, this is what Ekos logged:

2018-07-07T16:42:12 Using solver options: -O --no-plots --no-verify --resort -u arcsecperpix -L 4.0528092288503 -H 4.47942072662402

Sounds good right? Here is what it sent to ANSVR:

exec /usr/bin/solve-field -p -O -U none -B none -R none -M none -N none -C cancel --crpix-center -z 2 stars.fit

Thats the same command it sends to blind solve. :(

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remote solver | unable to solve 1 week 1 day ago #27258

Can you post a link to the FITS file without the PIXSIZE?

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remote solver | unable to solve 1 week 1 day ago #27259

Sure thing:

1drv.ms/f/s!AtqRof7LftCbg6QNm6vrU4fWF2cMjg

Should be there in minute or so. The NEW file is the one with PIXSIZE added. The normal file is the one from SGP. You'll notice they use different header data for pixel size. Y and X.

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remote solver | unable to solve 1 week 1 day ago #27264

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rockstarbill wrote: Sure thing:

1drv.ms/f/s!AtqRof7LftCbg6QNm6vrU4fWF2cMjg

Should be there in minute or so. The NEW file is the one with PIXSIZE added. The normal file is the one from SGP. You'll notice they use different header data for pixel size. Y and X.


tests done on Ubuntu 16.04 with Astrometry 0.67
solve-field -z 2 -B none -P none -M none -S none -R none -U none -T -p -O IMAGE_NAME

Thanks for providing test images.
With the first image I'm unable to do anything with it. It crashes, seen below.

# ./verify.sh NGC7000_300sec_1x1_Ha_frame1.fit
Reading input file 1 of 1: "NGC7000_300sec_1x1_Ha_frame1.fit"...
Header has 49 cards
Traceback (most recent call last):
File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
exec code in run_globals
File "/usr/lib/python2.7/dist-packages/astrometry/util/image2pnm.py", line 323, in <module>
sys.exit(main())
File "/usr/lib/python2.7/dist-packages/astrometry/util/image2pnm.py", line 320, in main
mydir, fix_sdss=options.fix_sdss)
File "/usr/lib/python2.7/dist-packages/astrometry/util/image2pnm.py", line 248, in convert_image
(imgtype, errstr) = image2pnm(infile, outfile, sanitized, force_ppm, no_fits2fits, extension, mydir, fix_sdss)
File "/usr/lib/python2.7/dist-packages/astrometry/util/image2pnm.py", line 184, in image2pnm
errstr = fits2fits(infile, sanitized, fix_idr=fix_sdss)
File "/usr/lib/python2.7/dist-packages/astrometry/util/fits2fits.py", line 86, in fits2fits
hdu.scale('int16', '', bscale, bzero)
File "/usr/lib/python2.7/dist-packages/pyfits/hdu/image.py", line 383, in scale
bzero=bzero, blank=None)
File "/usr/lib/python2.7/dist-packages/pyfits/hdu/image.py", line 441, in _scale_internal
self.data += -_zero
TypeError: Cannot cast ufunc add output from dtype('int32') to dtype('uint16') with casting rule 'same_kind'
augment-xylist.c:588:backtick Failed to run command: /usr/bin/python -m astrometry.util.image2pnm --sanitized-fits-outfile /tmp/tmp.sanitized.cdNETD --fix-sdss --infile NGC7000_300sec_1x1_Ha_frame1.fit --uncompressed-outfile /tmp/tmp.uncompressed.0YNaYo --outfile none
ioutils.c:567:run_command_get_outputs Command failed: return value 1


Trying to parse SIP/TAN header from NGC7000_300sec_1x1_Ha_frame1.wcs...
plot-constellations.c:378:main: No such file: "NGC7000_300sec_1x1_Ha_frame1.wcs"
rm: cannot remove '*.wcs': No such file or directory
rm: cannot remove '*.new': No such file or directory
rm: cannot remove '*.axy': No such file or directory
#



However with the second one, it works but never solves.

# ./verify.sh NEW_NGC7000_300sec_1x1_Ha_frame1.fit
Reading input file 1 of 1: "NEW_NGC7000_300sec_1x1_Ha_frame1.fit"...
Header has 57 cards
Extracting sources...
Downsampling by 2...
simplexy: found 2744 sources.
Solving...
Reading file "./NEW_NGC7000_300sec_1x1_Ha_frame1.axy"...
Field 1 did not solve (index index-4219.fits, field objects 1-10).
Field 1 did not solve (index index-4218.fits, field objects 1-10).
Field 1 did not solve (index index-4217.fits, field objects 1-10).
Field 1 did not solve (index index-4216.fits, field objects 1-10).
Field 1 did not solve (index index-4215.fits, field objects 1-10).
Field 1 did not solve (index index-4214.fits, field objects 1-10).
Field 1 did not solve (index index-4213.fits, field objects 1-10).
Field 1 did not solve (index index-4212.fits, field objects 1-10).
Field 1 did not solve (index index-4211.fits, field objects 1-10).
Field 1 did not solve (index index-4210.fits, field objects 1-10).
Field 1 did not solve (index index-4209.fits, field objects 1-10).
Field 1 did not solve (index index-4208.fits, field objects 1-10).
Field 1 did not solve (index index-4207-11.fits, field objects 1-10).
Field 1 did not solve (index index-4207-10.fits, field objects 1-10).
Field 1 did not solve (index index-4207-09.fits, field objects 1-10).
Field 1 did not solve (index index-4207-08.fits, field objects 1-10).
Field 1 did not solve (index index-4207-07.fits, field objects 1-10).
Field 1 did not solve (index index-4207-06.fits, field objects 1-10).
Field 1 did not solve (index index-4207-05.fits, field objects 1-10).
Field 1 did not solve (index index-4207-04.fits, field objects 1-10).

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Odroid C1 running indiserver (kept up-to-date with apt-get update/upgrade)
HEQ5 pro / Atik titan / Atik 314L+

remote solver | unable to solve 1 week 1 day ago #27265

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Now if I fire up Ekos on my Mac and use the simulators (local), I hit the 'Load and Slew' in the Align module.

first picture: OK NGC7000_300sec_1x1_Ha_frame1.fit

2018-07-08T11:45:53 Target is within acceptable range. Astrometric solver is successful.
2018-07-08T11:45:53 Target is within 0° 00' 08" degrees of solution coordinates.
2018-07-08T11:45:53 Solution coordinates: RA (21h 00m 38s) DEC ( 43° 41' 25") Telescope Coordinates: RA (21h 00m 38s) DEC ( 43° 41' 33")
2018-07-08T11:45:53 Solver completed in 3 seconds.
2018-07-08T11:45:51 Starting solver...
2018-07-08T11:45:51 Solver iteration #1
2018-07-08T11:45:51 Image received.
2018-07-08T11:45:49 Capturing image...
2018-07-08T11:45:24 Slewing to target coordinates: RA (21h 00m 38s) DEC ( 43° 41' 33").
2018-07-08T11:45:24 Solution coordinates: RA (21h 00m 38s) DEC ( 43° 41' 33") Telescope Coordinates: RA (06h 22m 32s) DEC ( 90° 00' 00")
2018-07-08T11:45:24 WCS information updated. Images captured from this point forward shall have valid WCS.
2018-07-08T11:45:24 Solver completed in 24 seconds.
2018-07-08T11:45:01 Starting solver...
2018-07-08T11:45:00 Solver iteration #1
2018-07-08T11:45:00 Index files index-4200 to index-4206 are missing. Astrometry.net would not be able to adequately solve plates until you install the missing index files. Download the index files from www.astrometry.net
2018-07-08T11:45:00 Using solver options: -O --no-plots --no-verify --resort --downsample 2 -3 314.991 -4 43.6215 -5 15
2018-07-08T11:45:00 FITS header: Cannot find PIXSIZE1 (keyword not found in header).
2018-07-08T11:44:40 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.
2018-07-08T11:44:39 Detected Astrometry.net version 0.73
2018-07-08T11:44:39 Idle.



And with the second picture: OK NEW_NGC7000_300sec_1x1_Ha_frame1.fit

2018-07-08T11:48:31 Target is within acceptable range. Astrometric solver is successful.
2018-07-08T11:48:31 Target is within 0° 00' 07" degrees of solution coordinates.
2018-07-08T11:48:31 Solution coordinates: RA (21h 00m 38s) DEC ( 43° 41' 26") Telescope Coordinates: RA (21h 00m 38s) DEC ( 43° 41' 33")
2018-07-08T11:48:31 Solver completed in 2 seconds.
2018-07-08T11:48:29 Starting solver...
2018-07-08T11:48:29 Solver iteration #1
2018-07-08T11:48:29 Image received.
2018-07-08T11:48:28 Capturing image...
2018-07-08T11:48:16 Slewing to target coordinates: RA (21h 00m 38s) DEC ( 43° 41' 33").
2018-07-08T11:48:16 Solution coordinates: RA (21h 00m 38s) DEC ( 43° 41' 33") Telescope Coordinates: RA (00h 41m 34s) DEC ( 56° 37' 57")
2018-07-08T11:48:16 Solver completed in 17 seconds.
2018-07-08T11:47:59 Starting solver...
2018-07-08T11:47:59 Solver iteration #1
2018-07-08T11:47:59 Using solver options: -O --no-plots --no-verify --resort --downsample 2 -3 314.991 -4 43.6215 -5 15 -L 51.3588 -H 94.0029 -u aw



Both solved with index index-4205-03.fits.

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Odroid C1 running indiserver (kept up-to-date with apt-get update/upgrade)
HEQ5 pro / Atik titan / Atik 314L+

remote solver | unable to solve 1 week 1 day ago #27266

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Ran the same solve-field command on the remote:

# solve-field -O --no-plots --no-verify --resort --downsample 2 -3 314.991 -4 43.6215 -5 15 -L 51.3588 -H 94.0029 -u aw NEW_NGC7000_300sec_1x1_Ha_frame1.fit
Reading input file 1 of 1: "NEW_NGC7000_300sec_1x1_Ha_frame1.fit"...
Header has 57 cards
Extracting sources...
Downsampling by 2...
simplexy: found 2744 sources.
Reading sort column "FLUX"
Sorting sort column
mmapping input file
Copying table header.
Writing row 0
Done
Solving...
Reading file "./NEW_NGC7000_300sec_1x1_Ha_frame1.axy"...
Only searching for solutions within 15 degrees of RA,Dec (314.991,43.6215)
Field 1 did not solve (index index-4211.fits, field objects 1-10).
Field 1 did not solve (index index-4210.fits, field objects 1-10).
Field 1 did not solve (index index-4209.fits, field objects 1-10).
Field 1 did not solve (index index-4208.fits, field objects 1-10).
Field 1 did not solve (index index-4207-03.fits, field objects 1-10).
Field 1 did not solve (index index-4206-03.fits, field objects 1-10).
Field 1 did not solve (index index-4205-03.fits, field objects 1-10).
Field 1 did not solve (index index-4204-15.fits, field objects 1-10).
Field 1 did not solve (index index-4204-14.fits, field objects 1-10).
Field 1 did not solve (index index-4204-13.fits, field objects 1-10).


unable to solve :(
I've CTRL+C as it goes on for ever.

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HEQ5 pro / Atik titan / Atik 314L+

remote solver | unable to solve 1 week 1 day ago #27267

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update, I ran the previous command again and let it run... against the picture NEW_NGC7000_300sec_1x1_Ha_frame1.fit
It was able to solve at the end, but it took over 2 minutes for it.

# date
Sun 8 Jul 13:07:25 CEST 2018
root@heidenrod-obs:/Astro/Astrometry/solves# solve-field -O --no-plots --no-verify --resort --downsample 2 -3 314.991 -4 43.6215 -5 15 -L 51.3588 -H 94.0029 -u aw NEW_NGC7000_300sec_1x1_Ha_frame1.fit
Reading input file 1 of 1: "NEW_NGC7000_300sec_1x1_Ha_frame1.fit"...
Header has 57 cards
32Extracting sources...
Downsampling by 2...
simplexy: found 2744 sources.
Reading sort column "FLUX"
Sorting sort column
mmapping input file
Copying table header.
Writing row 0
Done
Solving...
Reading file "./NEW_NGC7000_300sec_1x1_Ha_frame1.axy"...
Only searching for solutions within 15 degrees of RA,Dec (314.991,43.6215)
Field 1 did not solve (index index-4211.fits, field objects 1-10).
Field 1 did not solve (index index-4210.fits, field objects 1-10).
Field 1 did not solve (index index-4209.fits, field objects 1-10).
Field 1 did not solve (index index-4208.fits, field objects 1-10).
Field 1 did not solve (index index-4207-03.fits, field objects 1-10).
Field 1 did not solve (index index-4206-03.fits, field objects 1-10).
Field 1 did not solve (index index-4205-03.fits, field objects 1-10).
Field 1 did not solve (index index-4204-15.fits, field objects 1-10).
Field 1 did not solve (index index-4204-14.fits, field objects 1-10).
Field 1 did not solve (index index-4204-13.fits, field objects 1-10).
Field 1 did not solve (index index-4204-12.fits, field objects 1-10).
Field 1 did not solve (index index-4203-15.fits, field objects 1-10).
Field 1 did not solve (index index-4203-14.fits, field objects 1-10).
Field 1 did not solve (index index-4203-13.fits, field objects 1-10).
Field 1 did not solve (index index-4203-12.fits, field objects 1-10).
Field 1 did not solve (index index-4202-15.fits, field objects 1-10).
Field 1 did not solve (index index-4202-14.fits, field objects 1-10).
Field 1 did not solve (index index-4202-13.fits, field objects 1-10).
Field 1 did not solve (index index-4202-12.fits, field objects 1-10).
Field 1 did not solve (index index-4211.fits, field objects 11-20).
Field 1 did not solve (index index-4210.fits, field objects 11-20).
Field 1 did not solve (index index-4209.fits, field objects 11-20).
Field 1 did not solve (index index-4208.fits, field objects 11-20).
Field 1 did not solve (index index-4207-03.fits, field objects 11-20).
Field 1 did not solve (index index-4206-03.fits, field objects 11-20).
Field 1 did not solve (index index-4205-03.fits, field objects 11-20).
Field 1 did not solve (index index-4204-15.fits, field objects 11-20).
Field 1 did not solve (index index-4204-14.fits, field objects 11-20).
Field 1 did not solve (index index-4204-13.fits, field objects 11-20).
Field 1 did not solve (index index-4204-12.fits, field objects 11-20).
Field 1 did not solve (index index-4203-15.fits, field objects 11-20).
Field 1 did not solve (index index-4203-14.fits, field objects 11-20).
Field 1 did not solve (index index-4203-13.fits, field objects 11-20).
Field 1 did not solve (index index-4203-12.fits, field objects 11-20).
Field 1 did not solve (index index-4202-15.fits, field objects 11-20).
Field 1 did not solve (index index-4202-14.fits, field objects 11-20).
Field 1 did not solve (index index-4202-13.fits, field objects 11-20).
Field 1 did not solve (index index-4202-12.fits, field objects 11-20).
Field 1 did not solve (index index-4211.fits, field objects 21-30).
Field 1 did not solve (index index-4210.fits, field objects 21-30).
Field 1 did not solve (index index-4209.fits, field objects 21-30).
Field 1 did not solve (index index-4208.fits, field objects 21-30).
Field 1 did not solve (index index-4207-03.fits, field objects 21-30).
Field 1 did not solve (index index-4206-03.fits, field objects 21-30).
Field 1 did not solve (index index-4205-03.fits, field objects 21-30).
Field 1 did not solve (index index-4204-15.fits, field objects 21-30).
Field 1 did not solve (index index-4204-14.fits, field objects 21-30).
Field 1 did not solve (index index-4204-13.fits, field objects 21-30).
Field 1 did not solve (index index-4204-12.fits, field objects 21-30).
Field 1 did not solve (index index-4203-15.fits, field objects 21-30).
Field 1 did not solve (index index-4203-14.fits, field objects 21-30).
Field 1 did not solve (index index-4203-13.fits, field objects 21-30).
Field 1 did not solve (index index-4203-12.fits, field objects 21-30).
Field 1 did not solve (index index-4202-15.fits, field objects 21-30).
Field 1 did not solve (index index-4202-14.fits, field objects 21-30).
Field 1 did not solve (index index-4202-13.fits, field objects 21-30).
Field 1 did not solve (index index-4202-12.fits, field objects 21-30).
Field 1 did not solve (index index-4211.fits, field objects 31-40).
Field 1 did not solve (index index-4210.fits, field objects 31-40).
Field 1 did not solve (index index-4209.fits, field objects 31-40).
log-odds ratio 97.0462 (1.40161e+42), 16 match, 0 conflict, 50 distractors, 41 index.
RA,Dec = (314.992,43.6219), pixel scale 1.20457 arcsec/pix.
Hit/miss: Hit/miss: ++++---++-+


+--+
+---+--+
++
+----+(best)
+----
Field 1: solved with index index-4208.fits.
Field 1 solved: writing to file ./NEW_NGC7000_300sec_1x1_Ha_frame1.solved to indicate this.
Field: NEW_NGC7000_300sec_1x1_Ha_frame1.fit
Field center: (RA,Dec) = (314.991619, 43.621719) deg.
Field center: (RA H:M:S, Dec D:M:S) = (20:59:57.989, +43:37:18.190).
Field size: 85.3286 x 56.9721 arcminutes
Field rotation angle: up is 179.509 degrees E of N
Creating new FITS file "./NEW_NGC7000_300sec_1x1_Ha_frame1.new"...

root@heidenrod-obs:/Astro/Astrometry/solves# date
Sun 8 Jul 13:09:29 CEST 2018
#

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remote solver | unable to solve 1 week 1 day ago #27268

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I have amended the solve-field attributes with -d 31-40 and it solves much quicker. However, how can I possibly know this value on new pictures?

# solve-field -O --no-plots --no-verify --resort -d 31-40 --downsample 2 -3 314.991 -4 43.6215 -5 15 -L 51.3588 -H 94.0029 -u aw NEW_NGC7000_300sec_1x1_Ha_frame1.fit 
Reading input file 1 of 1: "NEW_NGC7000_300sec_1x1_Ha_frame1.fit"...
Header has 57 cards
Extracting sources...
Downsampling by 2...
simplexy: found 2744 sources.
Reading sort column "FLUX"
Sorting sort column
mmapping input file
Copying table header.
Writing row 0
Done
Solving...
Reading file "./NEW_NGC7000_300sec_1x1_Ha_frame1.axy"...
Only searching for solutions within 15 degrees of RA,Dec (314.991,43.6215)
Field 1 did not solve (index index-4211.fits, field objects 31-40).
Field 1 did not solve (index index-4210.fits, field objects 31-40).
Field 1 did not solve (index index-4209.fits, field objects 31-40).
  log-odds ratio 97.0462 (1.40161e+42), 16 match, 0 conflict, 50 distractors, 41 index.
  RA,Dec = (314.992,43.6219), pixel scale 1.20457 arcsec/pix.
  Hit/miss:   Hit/miss: ++++---++-+--------+--+-------+---+--+----------++----------+----+(best)-----------------------------+----
Field 1: solved with index index-4208.fits.
Field 1 solved: writing to file ./NEW_NGC7000_300sec_1x1_Ha_frame1.solved to indicate this.
Field: NEW_NGC7000_300sec_1x1_Ha_frame1.fit
Field center: (RA,Dec) = (314.991619, 43.621719) deg.
Field center: (RA H:M:S, Dec D:M:S) = (20:59:57.989, +43:37:18.190).
Field size: 85.3286 x 56.9721 arcminutes
Field rotation angle: up is 179.509 degrees E of N
Creating new FITS file "./NEW_NGC7000_300sec_1x1_Ha_frame1.new"...
#


from the solve-field man page:

-d, --depth number or range
Number of field objects to look at, or range of numbers; 1 is the brightest star,
so "-d 10" or "-d 1-10" mean look at the top ten brightest stars only.

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Last Edit: by Gonzothegreat.

remote solver | unable to solve 1 week 1 day ago #27273

rockstarbill wrote: Sure thing:

1drv.ms/f/s!AtqRof7LftCbg6QNm6vrU4fWF2cMjg

Should be there in minute or so. The NEW file is the one with PIXSIZE added. The normal file is the one from SGP. You'll notice they use different header data for pixel size. Y and X.


So I investigated the FITS file generated by SGP and it was using a non-standard FITS keyword (SCALE) that is not officially defined by the standard. WIth the scale keyword, it's possible to use the "app" parameter in astrometry. So long story short, I added support for SCALE keyword in KStars in the next release.
The following user(s) said Thank You: rockstarbill

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Jasem Mutlaq
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remote solver | unable to solve 4 days 22 hours ago #27385

  • pug916
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I’m also having almost no luck plate solving. Is their anything else settings wise we should be doing to improve the chance of plate solving working?

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Skywatcher EQ6R / EdgeHD 8" / ZWO 1600MC Cool / ZWO 120MM-S

remote solver | unable to solve 4 days 22 hours ago #27386

  • pug916
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  • Fresh Boarder
  • Posts: 11
  • Karma: 1
  • Thank you received: 4
Any idea when this release will be out?

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Skywatcher EQ6R / EdgeHD 8" / ZWO 1600MC Cool / ZWO 120MM-S
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