This version of the HSpot manual and on-line Help has gone through further revisions since the OT1 Call versions. When HSpot reached the Open Time (OT1) Call version (5.0), the extensive updates included detailed post-launch knowledge and updates, particularly in the instrument chapters. Further modifications to observing modes have occurred and HSpot 5.3 for the GT2 Call now features further new, flight-tested, second generation observing modes and extensively updated calibration information. In some cases the time estimator now gives significantly different results from the initial OT1 version

In the 3.x version, the information about installation, requirements and supported platforms was completely revised. In the Version 4 there have been many changes in the instrument-specific functionality, so the instrument-specific chapters (9-12) have also been extensively revised by Tony Marston and the Instrument and Calibration Scientist Team to take into account the many new features that have been included and the features that have been supressed since the initial Guaranteed Time user release of HSpot. The rest of the manual was revised line-by-line and both the text and the screenshots updated. This reflects both the many tweaks and improvements made at the HSC to fix bugs and increase functionality and the constant updates in the Spot Core made at IPAC.