FOREWORD 



The U. S. Naval Oceanographic Office, as part of its mission to 

 provide deflection of the vertical information in ocean areas, is currently 

 engaged in studies concerning the accuracy of computing deflections of the 

 vertical from gravity survey data. The deflection of the vertical calculation 

 is the last step in a process involving many stages; consequently, the overall 

 accuracy will be dependent on the accuracy of each individual stage. This 

 report is concerned with the interim step of determining mean anomalies for 

 use in the Vening Meinesz formulation. Utilization of the numerical method 

 presented in this report is expected to result in a significant improvement in 

 the accuracy of interpolating mean anomalies from original survey data. 





F. L. SLATTERY 



Captain, U. S. Navy 



Commander 



U. S. Naval Oceanographic Office 



