Based on the following TLE I would say – CubeBug is Object D. There is only a very small difference between E and D.
You can see the simulations for a 73 deg elevation pass below.
OBJECT C 1 39152U 13018C 13119.81316187 .00000382 00000-0 62770-4 0 162 2 39152 098.0538 195.5539 0017226 234.1000 125.8588 14.76174108 523 OBJECT D 1 39153U 13018D 13119.81284018 .00000792 00000-0 12160-3 0 139 2 39153 098.0767 195.5622 0016899 235.6906 124.2735 14.76306953 541 OBJECT E 1 39154U 13018E 13119.81285196 .00000384 00000-0 62840-4 0 125 2 39154 098.0753 195.5632 0017108 235.4784 124.4788 14.76298177 542
I experience the same, object D gives the best doppler correction even with a high pass.
Together with the CubeBUG team I am trying to receive the data that is faint around the carrier
but until know I am not successful. The signal to noise ratio isn’t good enough for AX25 decoding.