receiving said electromagnetic radiation at a first position, said first position being located on a first sensing platform;

receiving said electromagnetic radiation at a second position and at a third position, said second and third positions being co-located in spaced relationship on a second sensing platform;

measuring first time difference of arrival (TDOA) information for said electromagnetic radiation between said first position and said second position;

measuring frequency difference of arrival (FDOA) information for said electromagnetic radiation between said first position and at least one of said second and third positions;

at least one of:

measuring second TDOA information for said electromagnetic radiation between said second position and said third position, or

measuring third TDOA information for said electromagnetic radiation between said first position and said third position, or

a combination thereof; and

determining a location of an emitter of said electromagnetic radiation based at least in part on an intersection of data determined from said first measured TDOA information with data determined, from said measured FDOA information and with at least one of data determined from said second TDOA information, data determined from said third TDOA information, or a combination thereof;

wherein said location of said emitter of said electromagnetic radiation is determined using data determined from TDOA and FDOA information measured while said first sensing platform and said second sensing platform are moving differently relative to each other and are moving relative to said emitter of said electromagnetic radiation;

wherein said location of said emitter of said electromagnetic radiation is determined without receiving said electromagnetic radiation at a position on a third sensing platform and without repositioning said first and second sensing platforms to new locations for measurement of additional TDOA or FDOA information.