I am actually working on a software dedicated to the tracking of satellites based on this. Unfortunately it's not yet ready to be released, some features are missing and it only kinda work for my specific setup. I have to look at the variable tracking operation of typical drivers such as EQMOD to make it compatible.
Here is a preview of the interface:
I tracked 4 O3B satellites . The tracking is pretty stable with most of the error being caused by the periodic error of the mount.
(30x15s per satellite, Orion 203/1000 on SkyViewPro, Canon 1000D)
Indi v1.5.0 has been released with a driver for Inova cameras: indi_inovaplx_ccd. It works fine for me both on my laptop and on my raspberry
The driver is not installed automatically when you update indi, you have to install it manually with the sdk:
sudo apt-get install indi-inovaplx libinovasdk
Thanks you for the feedback. It was the kind of problem I was expecting. Reducing the guiding duration may help but I am skeptical about the fact that it will allow a smooth tracking (do not try to reduce update_delay in the script, it wiil have no effect as pyephem has a time resolution of 1s).
It would be better to control individually RA and DEC speed but I haven't found a standard way to do that. I will add a dedicated property in the driver of my homemade mount. For other drivers I was thinking about timed pulse guide but it seems to be limited to very low speed. Do you have an idea ?
The computer date is used for the tracking. If you want to simulate the tracking for an other date you can add a bias by changing this line:
obs.date = ephem.now()
obs.date = ephem.now() + 4*ephem.hour + 40*ephem.minute
I forgot to mention that python 3 was required. I am still working on it and I will write the documentation when it will be finished.
Has anyone tried it? Could you give me your feedback on the tracking ?
I have done a small script in python for satellite tracking but I haven't yet tested it on real hardware.
You need Python (follow instructions on indilib.org/support/tutorials/166-instal...on-raspberry-pi.html) and PyEphem:
$ pip3 install --user pyephem
Here is the script in python:
# --- Settings --- # Change following parameters according to your need # Geographic location latitude = '43:43:47.0' longitude = '6:54:00.0' # Satellite TLE (can be retreived on https://www.space-track.org) TLE_line_1 = '1 25078U 97077B 16358.24735839 .00000123 00000-0 34052-4 0 9990' TLE_line_2 = '2 25078 86.3977 85.5078 0003714 108.4484 251.7118 14.38084761998341' # INDI settings host = 'localhost' port = 7624 driver_name ="Telescope Simulator" # Script settings update_delay = 1 # delay in s between updates # --- Code --- import PyIndi import time import sys import threading import ephem from math import pi # default client class IndiClient(PyIndi.BaseClient): def __init__(self): super(IndiClient, self).__init__() def newDevice(self, d): pass def newProperty(self, p): pass def removeProperty(self, p): pass def newBLOB(self, bp): pass def newSwitch(self, svp): pass def newNumber(self, nvp): pass def newText(self, tvp): pass def newLight(self, lvp): pass def newMessage(self, d, m): pass def serverConnected(self): pass def serverDisconnected(self, code): pass # connect the server print("Connection to " + host + ":" + str(port) + " ... ", end='') indiclient=IndiClient() indiclient.setServer(host,port) if (not(indiclient.connectServer())): print("FAILED") print("No indiserver running on "+indiclient.getHost()+":"+str(indiclient.getPort())) sys.exit(1) print("OK") # get the telescope device print("Get driver '"+ driver_name + "' ... ", end='') device_telescope=None telescope_connect=None device_telescope=indiclient.getDevice(driver_name) while not(device_telescope): time.sleep(0.5) device_telescope=indiclient.getDevice(driver_name) print("OK") # wait CONNECTION property be defined for telescope print("Wait CONNECTION property be defined ... ", end='') telescope_connect=device_telescope.getSwitch("CONNECTION") while not(telescope_connect): time.sleep(0.5) telescope_connect=device_telescope.getSwitch("CONNECTION") print("OK") # if the telescope device is not connected, we do connect it if not(device_telescope.isConnected()): print("Driver not connected, try to connect it ... ", end='') # Property vectors are mapped to iterable Python objects # Hence we can access each element of the vector using Python indexing # each element of the "CONNECTION" vector is a ISwitch telescope_connect.s=PyIndi.ISS_ON # the "CONNECT" switch telescope_connect.s=PyIndi.ISS_OFF # the "DISCONNECT" switch indiclient.sendNewSwitch(telescope_connect) # send this new value to the device t=10 while not(device_telescope.isConnected()) and t>0: time.sleep(1) t-=1 if not(device_telescope.isConnected()): print("FAILED") print("Failed to connect the driver") sys.exit(1) print("OK") # We want to set the ON_COORD_SET switch to engage tracking after goto # device.getSwitch is a helper to retrieve a property vector print("Set tracking mode ... ", end='') telescope_on_coord_set=device_telescope.getSwitch("ON_COORD_SET") while not(telescope_on_coord_set): time.sleep(0.5) telescope_on_coord_set=device_telescope.getSwitch("ON_COORD_SET") # the order below is defined in the property vector, look at the standard Properties page # or enumerate them in the Python shell when you're developing your program telescope_on_coord_set.s=PyIndi.ISS_ON # TRACK telescope_on_coord_set.s=PyIndi.ISS_OFF # SLEW telescope_on_coord_set.s=PyIndi.ISS_OFF # SYNC indiclient.sendNewSwitch(telescope_on_coord_set) telescope_radec=device_telescope.getNumber("EQUATORIAL_EOD_COORD") while not(telescope_radec): time.sleep(0.5) telescope_radec=device_telescope.getNumber("EQUATORIAL_EOD_COORD") print("OK") # Configure PyEphem print("Configure PyEphem ... ", end='') obs = ephem.Observer() obs.lon = longitude obs.lat = latitude satellite = ephem.readtle('TARGET',TLE_line_1,TLE_line_2) print("OK") while 1: # compute satellite coordinates obs.date = ephem.now() satellite.compute(obs) print(obs.date) print(" RA: ",satellite.ra) print(" DEC:",satellite.dec) print(" ALT:",satellite.alt) print(" AZ: ",satellite.az) # We set the desired coordinates telescope_radec.value=ephem.hours(satellite.ra)*24/2/pi telescope_radec.value=ephem.degrees(satellite.dec)*360/2/pi indiclient.sendNewNumber(telescope_radec) time.sleep(update_delay)