×

INDI Library v2.0.6 is Released (02 Feb 2024)

Bi-monthly release with minor bug fixes and improvements

ATIK INDI driver , fits header with wrong EXPTIME

  • Posts: 28
  • Thank you received: 4
Hi,

here a few runs with different ADU/exposure times. Looks like the exposure time is divided by 10, than the number eventually becomes numericaly instable , sometimes even negative.


3x ADU20 5 sec exposure flats:

01 EXPTIME 5.
02 EXPTIME 0.5
03 EXPTIME 1.25

5x ADU20 10sec exposure flats:

01 EXPTIME 10.
02 EXPTIME 1.
03 EXPTIME 0.1
04 EXPTIME 0.009999999..
05 EXPTIME 0.027279999..

20x ADU33 15sec exposure flats:

01 EXPTIME 15.
02 EXPTIME 1.5
03 EXPTIME 0.150000005960464
04 EXPTIME 0.586045980453491
05 EXPTIME 0.290841996669769
06 EXPTIME 0.029084200039506
07 EXPTIME 15.
08 EXPTIME 1.5
09 EXPTIME 0.150000005960464
10 EXPTIME 0.0149999996647239
11 EXPTIME 0.00150000001303852
12 EXPTIME 0.000150000007124618
13 EXPTIME -1.58333337306976
14 EXPTIME -1.60000002384186
15 EXPTIME -1.61666667461395
16 EXPTIME -1.63333332538605
17 EXPTIME -1.64999997615814
18 EXPTIME -1.66666662693024
19 EXPTIME -1.68333327770233
20 EXPTIME -1.70000004768372

13x ADU40 15 sec exposure flats:

01 EXPTIME 15.
02 EXPTIME 1.5
03 EXPTIME 0.150000005960464
04 EXPTIME 0.68189400434494
05 EXPTIME 15.
06 EXPTIME 1.5
07 EXPTIME 0.150000005960464
08 EXPTIME 0.0149999996647239
09 EXPTIME 0.0413363017141819
10 EXPTIME 0.0239087007939816
11 EXPTIME 0.0238080993294716
12 EXPTIME 0.0236179996281862
13 EXPTIME 0.0235965996980667
8 years 9 months ago #4482

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

hold on ... are you using Ekos ADU % to calculate optimal exposure time for a particular ADU %? If you see the ADU % to anything but 0, it will try to automatically figure out the exposure time required to get to that ADU. I think this could be causing it, let me investigate Ekos algorithm.
8 years 9 months ago #4483

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

Ok, so it is the ADU flat algorithm, it was only tested on the simulator before. Can you send me a serious of 10 flats with different ADUs? That would help me a bit in the testing, thanks!
8 years 9 months ago #4484

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

  • Posts: 28
  • Thank you received: 4
You mean something like this:

10 x flat with 20ADU
10 x flat with 30ADU
10 x flat with 40ADU etc ??
8 years 9 months ago #4485

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

No,

1 Flat 5% ADU
1 Flat 10% ADU
...etc
1 Flat 95% ADU

Don't use Ekos ADU %, LEAVE it as ZERO, and experiment with exposure times until you get the desired ADU.
8 years 9 months ago #4486

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

So I updated INDI::CCD to check for exposure limits, it was accepting negative value before!! Furthermore, I updated Ekos to fail if the calculation does not yield useful results. So don't send me anything yet, tomorrow both kstars-bleeding and INDI will be updated in the PPA. Please update and then start KStars from the console/terminal, and take flats again with a particular ADU % in Ekos, then send me the KStars log from the terminal, it should display the ADU & Exposure settings along with the calculated slope in each go. Send me the log and the captured fits so I can investigate further.
8 years 9 months ago #4487

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

  • Posts: 28
  • Thank you received: 4
Ah damn, just captured those flats :-)
oK, will try to update tomorrow and start a new run including logs and flats.

thx
8 years 9 months ago #4489

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

  • Posts: 28
  • Thank you received: 4
Hi,

the "Debug" and "Simulation" buttons are missing
8 years 8 months ago #4524

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

  • Posts: 712
  • Thank you received: 174
You are right... I believe that the simpler is the better :-) For debugging purposes there is atik_ccd_test utility. Peter
8 years 8 months ago #4525

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

  • Posts: 28
  • Thank you received: 4
Simpler sounds good to me :-) Any chance to provide any help regarding the ADU setting for me ?
8 years 8 months ago #4526

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

  • Posts: 712
  • Thank you received: 174
No idea, this is probably question for Jasem. Peter
8 years 8 months ago #4527

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

Time to create page: 0.696 seconds