Reentry or S/M Estimation

Reentry date estimation

To compute an estimation of the reentry date, after initialization as described here, we must call for the estimateReentry() method given a list of TLE as input ...

// Reentry estimation computation
final OperaReentryResult result = simulation.estimateReentry(tles);

Then, we will just have to call for the right "getter" methods as in the example below.

System.out.println("Reentry date with " + historyDuration +" days interval: "+result.getReentryDate());
System.out.println("Error estimation: " + result.getErrorEstimationDays() + "days");
System.out.println("Estimated S/M: " + result.getSmDragRefined() + "m2/kg");

S/M estimation

As for the Reentry date computation, we have to initialize as described here then calling the estimateInitialSm() method given a list of TLE as input ...

// S/M estimation computation
final OperaReentryResult result = simulation.estimateInitialSm(tles);

Then, we will just have to call for the right "getter" methods as in the example below.

System.out.println("A priori S/m: "+result.getSmDragApriori());
System.out.println("Refined S/m: "+result.getSmDragRefined());