Table 1.

Parameters of four data sets analyzed. The last three were generated by combining 2, 4, and 10 successive frames of the first data set. Relevant pixels refer to the green region in Fig. 2(b). Only the photons in this region have orientational information about the data frames.

	Total photons/frame	No. of frames (millions)	Relevant photons/frame	Absorbed photons/frame
1	99.5	15.6	37.0	3.9
2	198.7	7.8	73.8	7.8
3	397.2	3.9	147.6	15.6
4	991.6	1.6	368.4	39.1