Signal_Data_2021_09_09__2021_11_18Library   "Signal_Data_2021_09_09__2021_11_18" 
Functions to support my timing signals system
 import_start_time(harmonic)  get the start time for each harmonic signal
  Parameters:
     harmonic : is an integer identifying the harmonic
  Returns: the starting timestamp of the harmonic data
 import_signal(index, harmonic)  access point for pre-processed data imported here by copy paste
  Parameters:
     index : is the current data index, use 0 to initialize
     harmonic : is the data set to index, use 0 to initialize
  Returns: the data from the indicated harmonic array starting at index, and the starting timestamp of that data
