In order to analyse the experimental data, you should:
- run CreateGeo.C [root CreateGeo.C]
      --> it is needed to read the geometry (eventually, the input geo file 
	  can be changed). No events are actually simulated.
- run ReadRawData.C [root -b ReadRawData.C (-b option to prevent plots pop up]
      --> in this macro, the raw data are "unpacked" and the hits are grouped
	  event by event into PndSttRawHit objects
      --> PAY ATTENTION: check the input filename!!
      --> it produces an output file (output.root) with 2 interesting objects:
	  - the Histos directory, with the raw plots with time information and 
	  the fit of the r-t graph
	  - cbmsim with the SttRawHit branch, with the raw and fpga pieces of 
	  information
      --> it produces two .dat files:
	  - toffset.dat, with 4 columns: tubeID, t0, DeltaT, noise level. It is
	  needed to convert tdc info in radius
	  - rt_fitparams.dat, with contains the 5 parameters of the fourth 
	  order polynomial used to fit the r-t graph
- run CreateSttHits.C [root CreateSttHits.C]
      --> starting from the PndSttRawHits, it creates the usual STT hits
      --> it produces an output file (digi_real.root) with the usual cbmsim
	  branch and the STTHit TClonesArray of PndSttHit objects.
- run Reco.C [root Reco.C]
      --> it runs the task devoted to the tracking
      --> the event display can be switched on and off