,-------------------.              
                                  |LeastSquaresProblem|              
                                  |-------------------|              
                                  `-------------------'              
                                             |                       
                                             |                       
,-----------------------------------.        |                       
|BatchLSEstimator                   |        |                       
|-----------------------------------|        |                       
|+addMeasurement(measurement)       |  ,---------.                   
|+getOrbitalParametersDrivers()     |  |ODProblem|                   
|+getPropagatorsParametersDrivers() |--|---------|                   
|+getMeasurementsParametersDrivers()|  `---------'                   
|+setObserver(observer)             |        |                       
|+estimate()                        |        |                       
`-----------------------------------'        |                       
                                             |                       
                                   ,------------------.              
                                   |MeasurementHandler|              
                                   |------------------|              
                                   `------------------'              
                                                                     
                                                                     
                                 ,-------------------.   ,----------.
                                 |ObservedMeasurement|   |Propagator|
                                 |-------------------|   |----------|
                                 |+estimate(state)   |   `----------'
                                 `-------------------'               
                                                                     
                         ,--------------------.                      
                         |EstimatedMeasurement|                      
                         |--------------------|                      
                         `--------------------'