Yes, you can. To receive two different satellite sources you will need to install a rotator for the satellite antenna or to install two or more satellite antennas to receive stations from multiple directions. Your TV supports DiSEqC 1.0 that enables you to switch between multi satellite sources without an additional satellite receiver.
Philips does not manufacture accessories for the reception of satellite signals. If you wish to purchase or install satellite equipment, you may contact your dealer or a specialist.