[Paparazzi-devel] Why the rotorcraft have a lower message frequency from ublox GPS module?

[QawsQAER]

Dear Developers:

I notice that in sw/airborne/modules/gps/gps_ubx_ucenter.c,
it configure message to be sent from the GPS module 

  391 #if defined FIRMWARE && FIRMWARE == ROTORCRAFT
  392     gps_ubx_ucenter_enable_msg(UBX_NAV_ID, UBX_NAV_SOL_ID, 1);
  393 #else
  394     gps_ubx_ucenter_enable_msg(UBX_NAV_ID, UBX_NAV_SOL_ID, 8);
  395 #endif

What's the reason for rotorcraft to have a lower NAV-SOL message frequency ?
As the measurement frequency is 4hz, can i change
gps_ubx_ucenter_enable_msg(UBX_NAV_ID, UBX_NAV_SOL_ID, 1);
into 
gps_ubx_ucenter_enable_msg(UBX_NAV_ID, UBX_NAV_SOL_ID, 4);
?




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