Basic principle

GENTLEMAN proposes a Java interface. Using this Java interface is relatively simple but as GENTLEMAN needs a lot of data as inputs the most important difficulty will be to initialize them.

So, the developer will have to:

1. Initialize data set and loggers:

     // Patrius dataset initialization
     PatriusDataset.addResourcesFromPatriusDataset();
           
     // Log4j initialization
     GtmLogger.iniLog4j(GtmConstants.DEF_LOG_FILE, false);
   #:
   

2. Initialize a GENTLEMAN propagator (see here).
3. Execute the propagation to store the output in a spacecraft list.
4. Initialize a GENTLEMAN GtmObjectData object to characterize the considered space object.
5. Initialize a GENTLEMAN TLE data object to define how TLE(s) will be built.
6. Initialize a GENTLEMAN GtmBuilder builder object.
7. Call the needed method of the builder object.
8. Get the results via getters methods.