Make doppler executable specifyable

trackHI.py

@@ -12,7 +12,8 @@ import time
 freq_HI = 1420.405751
 
 def track_frequency(lo=LocalOscillator(), dt=telescope(),
-                    tracking_frequency=freq_HI):
+                    tracking_frequency=freq_HI,
+                    doppler_executable="/home/harm/bin/doppler_mb"):
     """Sets the Local Oscillator to a frequency to correct for Doppler shift"""
     dt_lat = np.deg2rad(52.812019)
     dt_lon = np.deg2rad(6.396169)
@@ -25,7 +26,7 @@ def track_frequency(lo=LocalOscillator(), dt=telescope(),
         argstring = "{ra} {dec} 2000 {time} {dt_lat} {dt_lon} {dt_alt}".format(
                 ra=ra, dec=dec, time=t, dt_lat=dt_lat, dt_lon=dt_lon, dt_alt=dt_alt)
 
-        doppler_cmd = "/home/harm/bin/doppler_mb " + argstring + " " + str(tracking_frequency)
+        doppler_cmd = doppler_executable + " " + argstring + " " + str(tracking_frequency)
         freq_doppler = float(subprocess.Popen(doppler_cmd, stdout=subprocess.PIPE, shell=True).stdout.read())
         dfreq = 1000.0 + tracking_frequency - freq_doppler
         lo.frequency = dfreq * 1e6