LiF2 is the guide channel for Cycle 8.

• The LiF2 Channel has the most reliable target centering.
• Image stability at the LiF2 focal plane is within +/- 1 arcsec in pitch while the satellite is in fine guiding mode.
• The CALFUSE pipeline corrects the FUSE spectrum for effects such as charge depletion (gain sag) of the FUSE detectors. At a few isolated locations (e.g. Lyman Beta in the LWRS aperture due to airglow) this correction is significant. For HISTOGRAM mode observations, pulse-height information is not available for each detected photon, and this correction cannot be made. Thus, use of the MDRS aperture may be justified for particular portions of the spectrum. See section 2.5.3 of the FUSE Observer's Guide for further information.