by each set of 
                  Chebyshev polynomial coefficients (each logical 
                  record). Each set of Chebyshev coefficients must 
                  cover this fixed time interval, `intlen'. 
 
   n              Number of sets of Chebyshev polynomial coefficients 
                  for coordinates (number of logical records) to be 
                  stored in the segment. There is one set of 
                  Chebyshev coefficients for each time period. 
 
   polydg         Degree of ea