[daip] more NX table problems

[Lynn D. Matthews]

I'm running into more problems that I think are linked with the new NX 
tables created by SPLIT.

I have SPLIT out a single channel to do a self-cal sequence, 
and then run a P-only CALIB with 10-s SOLINT using a CC model. After 
one or many iterations, I see that the phases look good for the first half 
of the data, then are noisy for the second half.

Initially I thought that something went wrong during the second half of 
the observations, but then I found the exact same behavior for comparable 
data taken on different dates. If I delete the NX table, this problem goes 
away. In addition, without the NX table I go from getting, e.g., 1439 good 
solutions, 9 failed, to 1978 good, 10 failed.

Lynn Matthews