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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.

Satellite confusion

3 years 5 months ago
knro
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Satellite confusion #13483
I can see this possible with EQMod, but what about other mounts? Can there be a general solution for all mounts?

Jasem Mutlaq
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3 years 5 months ago
Ihoujin
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Satellite confusion #13493
I think their app output LX200 commands and then use EQMOD to convert it into ASCOM if necessary.
One thing to note though, I found in their forum that the MC firmware of many popular mounts such as skywatcher can't cope with rapid slew rate commands while near the zenith as it introduces a pause with each instruction at elevations somewhere above 70°

INDI/KStars on Raspberry Pi 4, 4gb
Raspbian Buster with AstroPi3 script configuration
Skywatcher HEQ5 Pro Mount
Canon 600D Camera
Orion SSAG/ASI120mm @280mm Guide Scope
PHD2
Adafruit Motor Hat shield
Adafruit GPS Module
Generic Bluetooth Joystick.
Startech 7 port powered USB Hub.

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3 years 4 months ago
Ihoujin
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Satellite confusion #14232
I just made a total reinstall from scratch, and now this script gives me the error
Traceback (most recent call last): File "../Track.py" , line 21, in <module> import Py Indi
ImportError: No module named 'PyIndi'
How can I resolve this?

INDI/KStars on Raspberry Pi 4, 4gb
Raspbian Buster with AstroPi3 script configuration
Skywatcher HEQ5 Pro Mount
Canon 600D Camera
Orion SSAG/ASI120mm @280mm Guide Scope
PHD2
Adafruit Motor Hat shield
Adafruit GPS Module
Generic Bluetooth Joystick.
Startech 7 port powered USB Hub.

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3 years 4 months ago
Ihoujin
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Satellite confusion #14233
Scratch that, I managed to install PyIndi. But now I get a similar error on line 25, "No module named 'ephem' ".
I installed ephem-3.7.6.0 via pip to no avail.

INDI/KStars on Raspberry Pi 4, 4gb
Raspbian Buster with AstroPi3 script configuration
Skywatcher HEQ5 Pro Mount
Canon 600D Camera
Orion SSAG/ASI120mm @280mm Guide Scope
PHD2
Adafruit Motor Hat shield
Adafruit GPS Module
Generic Bluetooth Joystick.
Startech 7 port powered USB Hub.

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3 years 3 months ago
Ihoujin
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Satellite confusion #14302
I fixed my issues. So for the record if it helps others here's what I did.
1. I made double certain to follor the INDI instructions on installing Python
2. Upgraded pip3 by elevating it with sudo
sudo pip3 install --upgrade pip
3. Again with sudo, (important) installed Pyephem
sudo pip3 install pyephem

INDI/KStars on Raspberry Pi 4, 4gb
Raspbian Buster with AstroPi3 script configuration
Skywatcher HEQ5 Pro Mount
Canon 600D Camera
Orion SSAG/ASI120mm @280mm Guide Scope
PHD2
Adafruit Motor Hat shield
Adafruit GPS Module
Generic Bluetooth Joystick.
Startech 7 port powered USB Hub.

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3 years 3 months ago 3 years 3 months ago by fehlfarbe.
fehlfarbe
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Satellite confusion #14315

Ihoujin wrote: It certainly should be possible to adjust the RA and DEC slewing rates independently.
They describe such a function they call a continuous tracking state for a sattrack app used with EQ-Mod.
http://eq-mod.sourceforge.net/faqs/sattrack.html
Maybe if this is open source it can be ported over?
Edit: It's not open source, it's shareware.
I wonder if they would be willing to collaborate on a Linux port, as it appears to be Windows only.
At least this shows that custom slew rates + pulse guiding commands are possible for satellite tracking.
Their website: heavenscape
Their app in action: EQMODLX: Satellite Tracking


I tried the satellite tracker software some years ago with my EQ-6 mount and EQMOD. I tracked several satellites with good precision. Here you can see a video of Globalstar M030 with 8" f/5 newtonian telescope and EOS 550D:
and another video of Globalstar M003 that shows periodic flares from the satellite:


I also tried to track the ISS and some other satellites but there was the problem that tracking rates above 1000 arcsec/sec (iirc) weren't possible. If the speed changes at tracking rates above 1000 the motors stop for a short time and then start to re-accelerate. This means the mount "jumps" from position to position and doesn't catch the satellite because the ramp acceleration is too slow.
IIRC this is a "feature" of the Skywatcher motor driver to prevent damages on the stepper motors.

Maybe someone fixed this problem. Last time I tried the software was 2011 or 2012.
The following user(s) said Thank You pauledd, Aletel

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3 years 3 months ago
Kaczorek
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Satellite confusion #14326

fehlfarbe wrote: I tried the satellite tracker software some years ago with my EQ-6 mount and EQMOD. I tracked several satellites with good precision.


What software you were using?
BTW. These videos are really cool! I have just showed them to a friend of mine and at first she said I'm crazy looking at a white dot on the black backgroud. After I explained what it is, she just said "wooow" ;-)

--
Radek Kaczorek
Astroberry Server | NEQ6 | Atik 460EX | Atik EFW2 | ASI 120MM

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3 years 3 months ago
fehlfarbe
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Satellite confusion #14327
I was using SatelliteTracker from www.heavenscape.com/ and EQMOD/EQMODLX under Windows XP.
A similar program for INDI would be nice :)
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1 year 7 months ago
petrush
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Satellite confusion #30932
Hi,

In case someone is playing around with python notebooks, I have recreated the script in earlier posts as a "linear" notebook that can send tracking goto commands to an indi telescope.

gist.github.com/petrushy/dc953a0d128064d6b5a071c72b2bd85c

But practically the goto method is too "jumpy" for smooth following a satellite, at least on my celestron mount..

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4 months 17 hours ago
emk
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Satellite confusion #49025
I'm curious. What is the current state of INDI concerning satellite tracking? And with regards to KStars, since it relies on INDI, does somebody know what that is able to?

I'm asking here, because this thread already existed and I didn't want to start an entire discussion from scratch just for my curiosity.

Cheers
Erik

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4 months 4 hours ago
Ihoujin
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Satellite confusion #49046
KStars will show you the location of satellites, but it can not actively drive the mount to track them.

INDI/KStars on Raspberry Pi 4, 4gb
Raspbian Buster with AstroPi3 script configuration
Skywatcher HEQ5 Pro Mount
Canon 600D Camera
Orion SSAG/ASI120mm @280mm Guide Scope
PHD2
Adafruit Motor Hat shield
Adafruit GPS Module
Generic Bluetooth Joystick.
Startech 7 port powered USB Hub.

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3 months 4 weeks ago
emk
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Satellite confusion #49057
Thanks. So summerize things up:
- INDI still misses the capability to differentially track satellite, we can make up for that by leapfrogging along the satellites pass, for once.
- KStars can show satellites on screen, you can select them and drive towards their current position, but there is no tracking, neither differentially nor leapfrogging. For leapfrogging you'd have to slew onto a future position which is not possible at the moment.
- No automated imaging of satellite when in FOV

So, to get things started, it might be interesting to implement the leapfrogging. I'm not too deap into KStars and Eko, so where would I want to add this feature? Make another Ekos tab?

During my work as scientific student here at the TU Braunschweig, I wrote a standalone program, using INDI, to "measure" satellites orbits via leapfrogging, given a telescope and a camera as equipment. But the complexity increases somewhat drastically with added functionality, and using KStars/Ekos, with its many already existing functions, such as taking Dark Images, etc, might be the logical next step.

I'd be happy to contribute something, although I'm just a mechanical engineering student :D, all I know about programming is what I taught myself.

Cheers
Erik

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