Hi Chris,
thanks for the good work. I support your thought that the two columns in Tome 6 probably are from two sources. The values in the first column rounded to the nearest degree correspond to the value in Tome 1.
It is now also apparent what the 1234 in the last column represent. Apparently 4 subframes form one full frame. That permits the number of parameters to be increased, by using a single location in a subframe for multiple alternating parameters, e.g. A and B each sampled every other second, or A, B, C and D once every 4 seconds.