Search found 32 matches

by han59
Tue Feb 15, 2022 10:53 am
Forum: Feature Suggestions
Topic: Better us of TIFF files, Astro-TIFF
Replies: 3
Views: 941

Re: Better us of TIFF files, Astro-TIFF

Hi Robin, I familiar with Pascal but not C#. But googling around I think libtiff can do it: http://www.libtiff.org/index.html The tag is: ImageDescription and is covered by the library as described here: http://www.libtiff.org/support.html ImageDescription 270 R/W It is is just a string/text of up t...
by han59
Mon Feb 14, 2022 2:40 pm
Forum: Feature Suggestions
Topic: Better us of TIFF files, Astro-TIFF
Replies: 3
Views: 941

Better us of TIFF files, Astro-TIFF

There is currently an initiative to make better use of the TIFF format for astronomy. The idea is to save a FITS header in a standard way into a TIFF file. This make conversion between TIFF and FITS possible without loosing header information. The FITS header is stored in the description tag of the ...
by han59
Wed Jan 05, 2022 8:36 pm
Forum: Feature Suggestions
Topic: Setting for a fixed FOV for solving
Replies: 1
Views: 697

Setting for a fixed FOV for solving

I got a help request from a SharpCap user with field of view of 0.2 degrees. The problem is that ASTAP searches between a FOV 10 degrees and 0.4 degrees. It would help if the users can select in SharpCap between auto FOV and a fixed value. See https://sourceforge.net/p/astap-program/discussion/gener...
by han59
Tue Nov 23, 2021 9:21 am
Forum: Bug Reports
Topic: FIT header RA seems off
Replies: 3
Views: 267

Re: FIT header RA seems off

Ra: 2:34:41 hours equals (2+34/60+41/3600)*15=38.67083 degrees. So that seems to match. It is super rare that the solver makes a mistake. Same applies for Astrometry.net. It is not impossible but super rare. It only happens with poor images with only a few stars to work with. It would classify it as...
by han59
Sat Jul 24, 2021 4:39 pm
Forum: Feature Suggestions
Topic: new command line version of ASTAP
Replies: 3
Views: 1044

Re: new command line version of ASTAP

I don't how far this has been introduced in SharpCap, but note that in the command-line version astap_cli a bug in reading the -fov parameter was found and fixed. So download the latest astap_cli for testing.

Clear skies, Han
author of ASTAP
by han59
Mon Oct 19, 2020 11:26 am
Forum: General Discussions
Topic: Solver ASTAP versions released between 2020-9-28 and 2020-10-19
Replies: 3
Views: 990

Solver ASTAP versions released between 2020-9-28 and 2020-10-19

ASTAP versions released on 2020-9-28 or later have bug which result in a poorer performance when used with SharpCap. After adding an improvement for solving global cluster images a bug was introduced effecting the auto FOV routine. For anybody having installed ASTAP on 2020-9-28 (ASTAP version 0.9.4...
by han59
Sat Sep 05, 2020 6:32 am
Forum: Feature Suggestions
Topic: ASTAP down-sampling setting in command-line
Replies: 4
Views: 1615

Re: ASTAP down-sampling setting in command-line

I think that overall the best thing to do would be for there to be away for the user to specify additional parameters for both Astap and Astrometry.Net -based plate solving applications removing any SharpCap default value for that parameter. Yes an edit box allowing additional commands is a good un...
by han59
Wed Aug 26, 2020 1:31 pm
Forum: Feature Suggestions
Topic: ASTAP down-sampling setting in command-line
Replies: 4
Views: 1615

ASTAP down-sampling setting in command-line

SharpCap executed ASTAP with a command line specifying down-sampling is automatic. This is in 99.5% of the cases correct. Recently I had an exchange with a user which required down-sampling 3. http://nova.astrometry.net/status/3800274 There is no option to set the down-sampling of ASTAP in SharpCap....
by han59
Wed Apr 22, 2020 8:37 am
Forum: General Discussions
Topic: Alternative Plate Solver
Replies: 22
Views: 7218

Re: Alternative Plate Solver

Hello Robin, The current ASTAP auto find of FOV goes from 9.5 degrees down to 0.6 degrees image height. One SharpCap user reports at CloudyNights a system which produces images of size 0.42 x 0.28 degrees. The auto FOV will not work and requires a manually setting in ASTAP manually. After that is go...