| Description | Says that they are keen to use the data they have from Arecibo [Ionospheric Observatory], which was 'taken at the time of the Mariner V encounter', for various calculations regarding 'the ephemeris on Venus and the earth' and 'the radius of Venus'. They would be assisted in this if they can have 'the ranging data on Mariner V for the period of the encounter to the high accuracy to which we believe that they exist'. |