  Jets often occur repeatedly from almost the same location. In this paper, a
complex solar jet was observed with two phases to the west of NOAA AR 11513 on
July 2nd, 2012. If it had been observed at only moderate resolution, the two
phases and their points of origin would have been regarded as identical.
However, at high resolution we find the two phases merge into one another and
the accompanying footpoint brightenings occur at different locations. The
phases originate from different magnetic patches rather than being one phase
originating from the same patch. Photospheric line of sight (LOS) magnetograms
show that the bases of the two phases lie in two different patches of magnetic
flux which decrease in size during the occurrence of the two phases. Based on
these observations, we suggest the driving mechanism of the two successive
phases is magnetic cancellation of two separate magnetic fragments with an
opposite polarity fragment between them.
