• Some C/C++ programming.
• Installed USG software (CR-Tools package)
• Successful completion of Exercise CR0

/data/lofarschool/data/Exercise-CR
`-- 2006.02.23.04:02:50.283.event

And the exercise_cr3 executable.

1. Execute the exercise_cr3 programm.
2. This processes one LOPES event in three different ways.
3. Play around with the parameters in the source and see what happens.

The unmodified programm produces the following output:

(horneffer)lioff024> ./exercise_cr3
  1) Testing on big LOPES30 event w/o direction-fit & w/o TV-Calib
FirstStagePipeline::setCalibration: Frequency band for analysis: 4.3e+07 Hz to 7.4e+07 Hz.                                                                      
SecondStagePipeline:: switched off phase calibration.                           
CRflaggingPlugin:calcWeights: Flagged Antenna #24 due to lack of signal.        
Event "/data/lofarschool/data/Exercise-CR/2006.02.23.04:02:50.283.event" fit results:                                                                           
 Fit to X-Beam has converged:                                                   
  XHeight: 5.27036e-06 +/- 2.52093e-07                                          
  XWidth : 4.91536e-08 +/- -1.11584e-09                                         
  XCenter: -1.80235e-06 +/- -1.56835e-18                                        
 Fit to CC-Beam has converged:                                                  
  CCHeight: 5.99877e-06 +/- 2.67481e-07                                         
  CCWidth : 5.16044e-08 +/- -1.30126e-09                                        
  CCCenter: -1.80272e-06 +/- -6.61175e-11                                       
  2) Testing on big LOPES30 event with simplex-fit                              
FirstStagePipeline::setCalibration: Frequency band for analysis: 4.3e+07 Hz to 7.4e+07 Hz.                                                                      
TVCalibrationPlugin: Not trusting Ant: 27 with residual badness: 0.202548       
TVCalibrationPlugin: Not trusting Ant: 28 with residual badness: 0.160514       
CRflaggingPlugin:calcWeights: Flagged Antenna #24 due to lack of signal.        
analyseLOPESevent::doPositionFitting: starting evaluateGrid().                  
analyseLOPESevent::doPositionFitting: starting SimplexFit().                    
 SimplexFit: reducing simplex                                                   
## 0 -------------------------------                                            
  Azimuth:   275.13; 276.13; 275.13; 276.13                                     
  Elevation:  53.32;  53.32;  54.32;  54.32                                     
  Distance:  4000.0; 6000.0; 2000.0; 3000.0                                     
  Center:    -1.807; -1.802; -1.792; -1.805                                     
  Height:     4.862;  6.500;  2.583;  3.802                                     
 SimplexFit: expanding simplex                                                  
## 1 -------------------------------                                            
  Azimuth:   275.13; 276.13; 276.47; 276.13                                     
  Elevation:  53.32;  53.32;  52.99;  54.32                                     
  Distance:  4000.0; 6000.0; 6666.7; 3000.0                                     
  Center:    -1.807; -1.802; -1.803; -1.805                                     
  Height:     4.862;  6.500;  6.756;  3.802                                     
.
.
.
 SimplexFit: reducing simplex                                                   
## 22 -------------------------------                                           
  Azimuth:   276.40; 276.38; 276.41; 276.41                                     
  Elevation:  53.08;  53.10;  53.08;  53.11                                     
  Distance:  6455.1; 6354.7; 6389.3; 6460.6                                     
  Center:    -1.803; -1.803; -1.803; -1.803                                     
  Height:     6.807;  6.808;  6.807;  6.807                                     
Event "/data/lofarschool/data/Exercise-CR/2006.02.23.04:02:50.283.event" fit results:                                                                           
 Fit to X-Beam has converged:                                                   
  XHeight: 6.47303e-06 +/- 1.67425e-07                                          
  XWidth : 4.91414e-08 +/- -6.03305e-10                                         
  XCenter: -1.80407e-06 +/- -4.69194e-19                                        
 Fit to CC-Beam has converged:                                                  
  CCHeight: 6.80782e-06 +/- 1.94929e-07                                         
  CCWidth : 5.27394e-08 +/- -8.45719e-10                                        
  CCCenter: -1.80339e-06 +/- -4.33048e-11                                       
  3) Testing on big LOPES30 event with simplex-fit and upsampling               
FirstStagePipeline::setCalibration: Frequency band for analysis: 4.3e+07 Hz to 7.4e+07 Hz.                                                                      
TVCalibrationPlugin: Not trusting Ant: 27 with residual badness: 0.202548       
TVCalibrationPlugin: Not trusting Ant: 28 with residual badness: 0.160514       
CRflaggingPlugin:calcWeights: Flagged Antenna #24 due to lack of signal.        
SecondStagePipeline:: switched off phase calibration.                           
SecondStagePipeline:: switched off RFI mitigation.                              
analyseLOPESevent::SetupEvent: Upsampling: upBlockSize: 2048 upBlock: 63 filter: 12                                                                             
analyseLOPESevent::SetupEvent:  min(Times): -6.4 max(Times): -0.003125          
analyseLOPESevent::doPositionFitting: starting evaluateGrid().                  
analyseLOPESevent::doPositionFitting: starting SimplexFit().                    
 SimplexFit: reducing simplex                                                   
## 0 -------------------------------                                            
  Azimuth:   275.13; 276.13; 275.13; 276.13                                     
  Elevation:  53.32;  53.32;  54.32;  54.32                                     
  Distance:  4000.0; 6000.0; 2000.0; 3000.0                                     
  Center:    -1.805; -1.806; -1.806; -1.803                                     
  Height:     4.741;  5.727;  3.238;  3.580                                     
 SimplexFit: expanding simplex                                                  
## 1 -------------------------------                                            
  Azimuth:   275.13; 276.13; 276.47; 276.13                                     
  Elevation:  53.32;  53.32;  52.99;  54.32                                     
  Distance:  4000.0; 6000.0; 6666.7; 3000.0                                     
  Center:    -1.805; -1.806; -1.806; -1.803                                     
  Height:     4.741;  5.727;  6.119;  3.580                                     
.
.
.

 SimplexFit: reducing simplex
## 24 -------------------------------
  Azimuth:   276.48; 276.50; 276.47; 276.47
  Elevation:  53.13;  53.14;  53.12;  53.14
  Distance:  6743.8; 6906.2; 6830.3; 6766.7
  Center:    -1.806; -1.806; -1.806; -1.806
  Height:     6.143;  6.140;  6.142;  6.142
Event "/data/lofarschool/data/Exercise-CR/2006.02.23.04:02:50.283.event" fit results:
 Fit to X-Beam has converged:
  XHeight: 5.79741e-06 +/- 9.57315e-08
  XWidth : 4.97792e-08 +/- -1.93828e-10
  XCenter: -1.80605e-06 +/- -2.51624e-20
 Fit to CC-Beam has converged:
  CCHeight: 6.1423e-06 +/- 7.1493e-08
  CCWidth : 5.08279e-08 +/- -1.55455e-10
  CCCenter: -1.80587e-06 +/- -4.48362e-12
[2] Testing argumented constructor ...
Elapsed: 3:59.30 - CPU: 227.714u+7.468s = 98.2%

If you are experiencing trouble getting the exercise to work, this is the place to leave a note about it.