  We present an interferometric technique for the reconstruction of ultra-wide
band impulsive signals from point sources. This highly sensitive method was
developed for the search for ultra-high energy neutrinos with the ANITA
experiment but is fully generalizable to any antenna array detecting radio
impulsive events. Applications of the interferometric method include event
reconstruction, thermal noise and anthropogenic background rejection, and solar
imaging for calibrations. We illustrate this technique with applications from
the analysis of the ANITA-I and ANITA-II data in the 200-1200 MHz band.
