The coma scenarios are based on the following scale information:

ENCKE            
Flyby speed   28km/s         
            
Time    Time     Range   CFI Resol   CFI FOV
(hr)   (sec)     (km)   (km/43 urad) 1024 pix
                                      (km)
-96   -345600   9676800    416.11    426093.14
-84   -302400   8467200    364.09    372831.50
-72   -259200   7257600    312.08    319569.86
-60   -216000   6048000    260.07    266308.22
-48   -172800   4838400    208.05    213046.57
-36   -129600   3628800    156.04    159784.93
-24    -86400   2419200    104.03    106523.29
-18    -64800   1814400     78.02     79892.46
-12    -43200   1209600     52.01     53261.64
 -6    -21600    604800     26.01     26630.82
 -3    -10800    302400     13.00     13315.41

At each one of these designated times, we will want to do the following
CFI sequence:
    OH
    OH/CN Continuum
    CN
    OH/CN Continuum
    C2
    C2 continuum
    clear filter

at -96 hours, we will want a 3 image mosaic in each filter
with an overlap of 1/4 the field on each side of the nucleus
(i.e. the middle image is centered on the nucleus, there are one
image each left and right of the centered one and each of these
offset one has about 1/4 of a chip overlap with the centered one).

at -18 hours, we will want a 2x2 mosaic in each filter with the corners
overlapping and holding the nucleus.  This allows the mapping of the complete
space around the nucleus in the close in region.

Within 6 hours, we will want the full filter sequence at regular
intervals.  Perhaps every 30 minutes until -3h and then every 10-15 minutes
(depending on exposure time).  Within 6 hours will want to add in some
of the geology filters so perhaps within 6 hours should just do the complete
filter wheel.

CFI loses the nucleus at -63 sec.