A copy of a video from Mount Wilson of the occultation of 28 Sgr by the rings of Saturn was processed to see if the described techniques could be used for such recordings. Saturn is used as a reference again, using the mask principle. Because of the duration of the event the fixed X ad Y offsets for the star have to be corrected for proper motion. This is done using two frames, one near the beginning and one near the end of the recording, to determine the change in X and Y as a number of pixels per time unit.
The resulting curve (figure 16) qualitively compares well with a result obtained by visual observation (figure 17, [Bul92] ) and shows more detail. The result can be improved considerably combining several runs again.
A last example of a video I tried to process concerns a recording made by Mr. Denzau in Germany of the occultation of 136 Tau by Venus using a 20 cm Celestron. Here again a couple of techniques were combined.
The resulting curve (figure 18) qualitively compares well with the photoelectric recording made at Hoher List Observatory (figure 19, [Hof91]). For a good quantative comparison a more elaborate analyses is necessary.
