[ccp4bb] what is NCS operators of parrot

[Wang]

Hi everyone:
   I used parrot to do density modification, and it found ncs operators. The 
operators found are:

Non-crystallographic operators:

 -ncs-operator 
-144.47,179.729,-144.321,18.7789,16.4179,19.809,16.4383,16.4507,19.809

 -ncs-operator 
-10.0955,179.846,169.903,27.2216,37.7585,38.88,27.0706,40.5231,38.88

  What does the operators mean? Is that Eular angle? But I changed it to 
ratation matrix, the result is not so good.

  Thanks

   Best wishes

                         Wang