×
INDI Library v1.8.5 Released (19 Apr 2020)

April 2020 release of INDI Library v1.8.5 introduces new drivers while providing fixes and improvements to existing devices and core framework.

ASTAP astrometry integration

8 months 3 weeks ago
Carneb
Junior Boarder
Junior Boarder
Posts: 28
More
ASTAP astrometry integration #45789

han.k wrote: Carneb,

Can you share an image made by the setup you try to solve?

Han


I didn't save any of the images, but I will try to get some tonight and share them here.

RPi 4B (4gb) running Stellarmate OS
Skywatcher Quattro 250 with f4 coma corrector
Skywatcher Evostar 80ED with 0.85 reducer/flattener
Skywatcher AZ-EQ6,
ASI1600MM Pro with ZWO 8x1.25" EFW,
Guide scope 50x190mm, Guide camera ASI290MM
ZWO EAF focuser

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago
han.k
Gold Boarder
Gold Boarder
Posts: 303
Karma: 6
More
ASTAP astrometry integration #45799
I didn't save any of the images, but I will try to get some tonight and share them here.[/quote]

Yes that will be interesting for me. Focal length of 190 mm hasn't been tested. Try to save a series and drop it somewhere in the web so I can have a look.

To avoid saturation, short or very short exposure times will be beneficial for solving.

Han

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago 8 months 3 weeks ago by Carneb. Reason: fix format
Carneb
Junior Boarder
Junior Boarder
Posts: 28
More
ASTAP astrometry integration #45803

han.k wrote: Yes that will be interesting for me. Focal length of 190 mm hasn't been tested. Try to save a series and drop it somewhere in the web so I can have a look.

To avoid saturation, short or very short exposure times will be beneficial for solving.

Han


I've attached 2 images. They are actually fits files but the forum software does not allow fits files for some reason.

File Attachment:

File Name: Light_L_1_...1-14.txt
File Size:4,151 KB

File Attachment:

File Name: NGC7293_Li..._001.txt
File Size:4,151 KB

RPi 4B (4gb) running Stellarmate OS
Skywatcher Quattro 250 with f4 coma corrector
Skywatcher Evostar 80ED with 0.85 reducer/flattener
Skywatcher AZ-EQ6,
ASI1600MM Pro with ZWO 8x1.25" EFW,
Guide scope 50x190mm, Guide camera ASI290MM
ZWO EAF focuser
Attachments:

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago 8 months 3 weeks ago by han.k.
han.k
Gold Boarder
Gold Boarder
Posts: 303
Karma: 6
More
ASTAP astrometry integration #45804
They solve without problems if you overwrite the image height in degrees from 0.37 degrees to 0.97 degrees (in the ASTAP program, stack menu, tab alignment).

The FITS header reports 190 mm focal length. That's is correct.
Pixel size is in the header PIXSIZE1 is 2.9 microns.
The CDELT1, CDELT2 are already specified at 3.258E-4 degrees per pixel . After solving they are 8.8118E-4 degrees per pixel. The CDELT1,2 values overwrite the result from focal length and pixel size.

So the CDELT1, CDELT2 values are wrong in the header. At the moment I don't know where you can correct a value to get CDELT1, CDELT2 corrected.

Han

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago
universalmaster
Gold Boarder
Gold Boarder
Posts: 200
More
ASTAP astrometry integration #45805
I have had some problems (not with ASTAP) that related to wrong information on the fits header. Maybe a small sanity check and a warning if the values are wrong would help identify these kinds of problems. It was at least not the first thing to my mind when I had trouble, which turned out not to be trouble after all but a bad fits header ;-)

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago
han.k
Gold Boarder
Gold Boarder
Posts: 303
Karma: 6
More
ASTAP astrometry integration #45813
I have a similar problem with image from a Mac user. The CDELT1,CDELT2 values in the header are also wrong.

Focal length 560 mm
Pixel size 3.8 micrometer. Pixel size 1.4 arcsec/pixel equals 0.000391 degrees/pixel
Dimensions 4656 x 3520 => Image size is 1.82 x 1.37 degrees
CDELT1,2 in header 0.000777 degrees/pixel but should be 0.000391 degrees/pixel

Why are CDELT1,2 wrong ?


image link
dl.free.fr/getfile.pl?file=/gAfdJ7sV

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago
knro
Administrator
Administrator
Posts: 8205
Karma: 51
Topic Author
ASTAP astrometry integration #45822
I believe I found the issue. INDI::CCD was always using the primary focal length when calculating CDELT1,2. It's now fixed in GIT.

Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago
han.k
Gold Boarder
Gold Boarder
Posts: 303
Karma: 6
More
ASTAP astrometry integration #45823
Does that mean users can also fix it by setting values correct in the ccd driver?

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago
knro
Administrator
Administrator
Posts: 8205
Karma: 51
Topic Author
ASTAP astrometry integration #45824
It's not set in the driver, it's calculated. So they need to use INDI Nightly or update from GIT. Since this is a major bug, I will also publish it to the stable channel.

Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago
rizal72
Fresh Boarder
Fresh Boarder
Posts: 13
More
ASTAP astrometry integration #45828

knro wrote: It's not set in the driver, it's calculated. So they need to use INDI Nightly or update from GIT. Since this is a major bug, I will also publish it to the stable channel.


Now, that's what I call "reactivity"!
I was having the same issues, and only while using the guidescope, like the others here.
This is the reason why Indi is far better than any other library I know of: amazing community, and amazing people taking care of it in real-time!

Amazing.

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago
rankinstudio
Expert Boarder
Expert Boarder
Posts: 100
More
ASTAP astrometry integration #45855
Just want to say, I had nothing but headaches working with the astrometry.net local server. This ASTAP solver is GREAT! Can't believe the improvement. Solves all fields, and usually within 1 second. Amazing.

Please Log in or Create an account to join the conversation.

8 months 3 weeks ago
han.k
Gold Boarder
Gold Boarder
Posts: 303
Karma: 6
More
ASTAP astrometry integration #45857
Rankinstudio,

Thanks for the feedback.

A technical question. I'm still a little worried about the problem with the CDELT1, CDELT2 keywords in the fits header. I'm still try to understand the scale of the problem. 1) Did you update INDI with the fix of Jasem? 2) Do you have the possibility to check if the FITS files contain the header keywords CDELT1, CDELT2 prior to solving and if they are correct? The problem is that these CDELT1, CDELT2 values overrule the focal length and pixel size setting.

Han

Please Log in or Create an account to join the conversation.

Time to create page: 1.011 seconds