Introduction
So after a few failed random trials by some users with the PAA tool, I really want to get to the bottom of this. From what I gathered this morning after giving it more thought is it is <em>most likely</em> caused by image orientation/rotation.
Currently, Ekos sets the correction vector as following:
<code>
correctionVector.setP1(celestialPolePoint);
correctionVector.setP2(RACenterPoint);
</code>
The vector starts from the location of the celestial pole to the location of the RA center of rotation. The idea is by adjusting the Alt/Az knobs on your mount, you move the mount RA center of rotation to coincide with the celestial pole.
![pah_1_2018-12-21-2.jpg]()
The above is using the Simulators with a polar error of 00:06:21
To make this easier, the user selects a star they can move to achieve this:
![pah_2_2018-12-21-2.jpg]()
Now by adjusting the mount knobs, the star in the <strong>image</strong> is moved to the Right/Bottom. The mount RA axis therefore is moving toward the Left/Top. When solved, astrometry.net reports the field parity for the simulator as Negative. So I'd like to collect some data by asking our lovely forum users to run an experiment with the PPA tool. <strong>Please make sure to enable Verbose Logging to File and select the Alignment module.</strong>
Data Required
1. Mount Type
2. Telescope Type (or PoleMaster)
3. Hemisphere: North or South.
4. Is the camera aligned with the telescope? If not, what's the angle of the rotation with respect to the telescope?
5. Please record how the image SHIFTS when you adjust the azimuth/altitude knobs:
5.1. Right Azimuth knob: When locking the RIGHT Azimuth knob, how does the image shift in the camera?
5.2. Altitude knob: When lowering the mount (Decreasing Altitude), how does the image shift in the camera?
6. PAA successful or not? Was PPA able to close the gap or it made things worse?
7. Logs
So after a few failed random trials by some users with the PAA tool, I really want to get to the bottom of this. From what I gathered this morning after giving it more thought is it is <em>most likely</em> caused by image orientation/rotation.
Currently, Ekos sets the correction vector as following:
<code>
correctionVector.setP1(celestialPolePoint);
correctionVector.setP2(RACenterPoint);
</code>
The vector starts from the location of the celestial pole to the location of the RA center of rotation. The idea is by adjusting the Alt/Az knobs on your mount, you move the mount RA center of rotation to coincide with the celestial pole.
The above is using the Simulators with a polar error of 00:06:21
To make this easier, the user selects a star they can move to achieve this:
Now by adjusting the mount knobs, the star in the <strong>image</strong> is moved to the Right/Bottom. The mount RA axis therefore is moving toward the Left/Top. When solved, astrometry.net reports the field parity for the simulator as Negative. So I'd like to collect some data by asking our lovely forum users to run an experiment with the PPA tool. <strong>Please make sure to enable Verbose Logging to File and select the Alignment module.</strong>
Data Required
1. Mount Type
2. Telescope Type (or PoleMaster)
3. Hemisphere: North or South.
4. Is the camera aligned with the telescope? If not, what's the angle of the rotation with respect to the telescope?
5. Please record how the image SHIFTS when you adjust the azimuth/altitude knobs:
5.1. Right Azimuth knob: When locking the RIGHT Azimuth knob, how does the image shift in the camera?
5.2. Altitude knob: When lowering the mount (Decreasing Altitude), how does the image shift in the camera?
6. PAA successful or not? Was PPA able to close the gap or it made things worse?
7. Logs
