  The precision of the attitude in the inter-satellite ranging missions like
GRACE is one of the important requirement. It is required not only for the
mission performance but also for the good quality of the gravity field models
which are estimated from the inter-satellite ranging measurements. Here we
present a comparative study of the analysis of two attitude datasets. One of
them is the standardSCA1Brelease 2 datasets provided by JPL NASA and another is
the reprocessed attitude computed atTU Graz by combining the angular
accelerations and the standardSCA1Brelease2 datasets. Further, we also present
the impact of the attitude datasets on the inter-satellite range measurements
by analyzing their residuals. Our analysis reveals the significant improvement
in the attitude due to the reprocessed product and reduced value of residuals
computed from the reprocessed attitude.
