Noise (and noise goals used by the time estimator) is now provided for COMBINED H and V polarisations of HIFI rather than a single polarisation.

- Implication for user: For users who have choosen a noise goal for their observations, the time estimation will now be 30-40 percent shorter.

All sensitivity and detector stability information has been updated to match on-ground instrument test values -- our best estimate of HIFI performance until we have in-flight measurements.

- Implication for user: This will change time estimates to some degree, although in most cases only by a small amount.

Several of the frequency ranges of HIFI bands have changed based on on-ground measurements.

- Implication for user: The AORs have been updated in the operational database and in some cases, when close to a band edge, the measurement will have changed in the database from one sub-band to another. Where the range of a band has got larger or smaller, the time estimation for a full-range spectral scan will change by the corresponding amount.

Warnings are now given of spurs in HIFI ranges.

- Implication for user: The user will now get a warning if a chosen frequency may be affected by a spur and will receive basic advice on how to treat it.

DBS overlays have been corrected.

- Implication for user: There was a bug in HSpot that caused DBS overlays to be wrong in some circumstances; the correct overlays are now displayed.

HIFI Beam sizes have been corrected in AOR overlays.

- Implication for user: HIFI beams were incorrectly scaled in the visualisation tool; this has now been corrected and the overlaid beams are now the correct size.