wnagele / gr-gpredict-doppler Goto Github PK

Running on the latest version of kali with Gnu Radio 3.7.10 and opening a new flow graph, when dropping the control on and hitting run I get the following error output with the default block settings. Any suggestions?

Traceback (most recent call last):
File "/home/activeuser/GNURadio/test_doppler.py", line 96, in
main()
File "/home/activeuser/GNURadio/test_doppler.py", line 84, in main
tb = top_block_cls()
File "/home/activeuser/GNURadio/test_doppler.py", line 62, in init
self.gpredict_doppler_0 = gpredict.doppler(self.set_freq, "localhost", 4532, True)
File "/usr/lib/python2.7/dist-packages/gnuradio/gr/hier_block2.py", line 92, in getattr
return getattr(self._impl, name)
AttributeError: 'top_block_sptr' object has no attribute 'set_freq'

Is there a way to simulate an inter-satellite channel using this project, in other words, I'm wondering if the tracker can be replaced by another satellite?
Thanks
Zak

does it generate the doppler shift of a singel frequency at a time ??? what if we want to generate for multiple satellites simultaneously.

Because of the "while True"-conditions in the run()-function, there is no clean exit when a python flow graph is stopped using the .stop() method. This leads to not freeing the TCP port and the remaining flow graph, especially when running a flow graph containing gr-gpredict-doppler from a python application and using the .start(), .stop() and .wait() flow graph methods.

It works in GNU Radio Companion because it kills flow graphs instead of stopping them, but this behaviour should be avoided.