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  1. GMAT
  2. GMT-5724

Batch output report (Unknown convergence status)

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      Description

      Why do we have the "unknown" DC Status for the initial 0th iteration?

      ***********************************************************  ITERATION   0:  MEASUREMENT STATISTICS  ***********************************************************
      
                                       Total Number Of Observations              : 1348            Current WRMS Residuals   : 1459.94
                                       Observations Used For Estimation          : 1348            Predicted WRMS Residuals : 1.0154
                                       No Computed Value Configuration Available : 0               Previous WRMS Residuals  : N/A
                                       Out of Ramp Table Range                   : 0               Smallest WRMS Residuals  : 1459.94
                                       Signal Blocked                            : 0               DC Status                : Unknown  
      								 
      

      Measurement and Residual Units

      Obs-Type Obs/Computed Units Residual Units Obs-Type Obs/Computed Units Residual Units
      Doppler_RangeRate kilometers/second kilometers/second Range_KM kilometers kilometers
      Doppler Hertz Hertz DSNRange Range Units Range Units

      
      

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            tdnguyen Tuan Nguyen added a comment - - edited

            the status of convergence or divergence is specified when the current WRMS is compared with the Best WRMS of all previous iteration. In 0th iteration, we do not has the Best WRMS of all previous iterations, so we cannot compare. Therefore, status has to be unknown.

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            tdnguyen Tuan Nguyen added a comment - - edited the status of convergence or divergence is specified when the current WRMS is compared with the Best WRMS of all previous iteration. In 0th iteration, we do not has the Best WRMS of all previous iterations, so we cannot compare. Therefore, status has to be unknown.
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            dcooley Steve Cooley added a comment -

            You can converge quicker using absolute tolerance criteria. I confirmed you get the correct output in this case:

            DC Status : Absolute Tolerance Converged

            Closing ticket.

            Show
            dcooley Steve Cooley added a comment - You can converge quicker using absolute tolerance criteria. I confirmed you get the correct output in this case: DC Status : Absolute Tolerance Converged Closing ticket.

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