Moves the upper filter wheel to the specified position. Normally, the two filter wheels are set using the /FILTER qualifier; this qualifier is provided to allow unusual settings of the upper filter wheel. The position may be specified by a number in the range 1-16, or by name. The position names are:
Blank, Clear, Helium (NB108) PGamma (NB109),
PBeta (NB128), FeII (NB164), AAOFeII (NB165), H2O (NB199),
H2_1_0 (NB212), BrGamma (NB217), Cont2.2 (NB222), H2_2_1 (NB225),
CO (NB236), Cont1.6, Grid, Focus
These names may be abbreviated. Alternative names for a position are
shown in parentheses. This qualifier cannot be specified with the /FILTER
qualifier.