Figure 11. Launching of NOAA deep-sea tide gauge showing 

 expendable tripod. 



and George A. Maul, was published in Journal of Geophysical 

 Research, Vol. 76, No. 2?, pp. 6601-6605, 1971. 



There are certain special orbits for which the 

 conclusions reached in the Zetler-Maul paper are not 

 applicable. If the regression in longitude between 

 successive orbits divides evenly into 360 , then the 

 spacecraft would periodically cover exactly the same set 

 of paths. As a consequence, some areas (as a one degree 



26-19 



