its the PH-KWK/PWF, something like that if i remember correctly, i used a friend today that is a chopper pilot  what it was and he told me it is being used to map out the whole country, there must be some sort of camera in those pods, or so they say.

EDIT:

http://avia-dejavu.net/photo%20PH-HWH.htm

Old photo though, nowadays it carries better equipment.