Handled ngGridEventScroll for particular ng-grid among more than ng-grid

I am using the multiple ng-grids in same page like below,

$scope.gridOptionsOne = {

//---------

}

$scope.gridOptionsTwo = {

//-----------

}

but i need to trigger ngGridEventScroll for gridOptionsTwo.

So handled the below condition, it will be working fine

$scope.$on('ngGridEventScroll', function(event) {
   if(event.targetScope == $scope.gridOptionsTwo .$gridScope) {
      //----------------
   }
});