*-- Author : S.Burke / J.V. Morris
      SUBROUTINE FKWMES(MES,HMES,GMES,W,HGW)
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*                                                                    *                                        
* Compute a measurement vector weighted by the inverse of its        *                                        
* covariance, and transformed into state vector space                *                                        
*                                                                    *                                        
* Output is HGW = HMES.GMES.W (MES is the number of measurements)    *                                        
*                                                                    *                                        
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*