High Error Rate

Hi,
When running `python3 stt.py sample_stereo 5 -n 3` with default params, I get 
```
---> GROUND TRUTH ATTITUDE (from FITS header):
 RA   = -13.9941°
 DEC  = -0.4907°
 Roll = 1.3315°

---> ATTITUDE SOLUTION:
 RA   = 18.8480°
 DEC  = 8.1683°
 Roll = -156.7409°
 Exec time = 6.4182 s
```

The gap between estimation and GT is high. What should I do? 