Here are just some of the new features LOW 4.1 has to offer:

• Import.
  You can import both old ILOC and new IOTA2008 format observation files into LOW. LOW will then compute the predictions related to your observations for you, along with creating any expeditions to grazing occultations. Once imported, you can immediately start looking at (graphic) reductions of your occultation observations (see Reductions below).
  
  
• Export.
  You can export predictions showing e.g. the moon and the occulted star, summaries of graze predictions together with a map with graze lines, graze lines (routes) and graze stations (waypoints) are exported in Garmin format and can be uploaded to your GPS receiver, graze expedition invitation documents, observations can be exported in the new IOTA2008 format and sent off by email to your local or regional coordinator.
  
  
• Predictions.
  The XZ80Q star catalogue with 244’051 stars is now used. In addition to stars and the planets you can now also create predictions for the 12 brightest natural satellites in the solar system, Messier, NGC/IC and even your own objects. To save you time, you can select from specific periods for which to calculate predictions. You can now also calculate predictions for multiple stations in one go. The predictions are more accurate than ever before. You can also be warned about upcoming occultations. A countdown window, clock ticks, an automatically played audio file with a rocket launch countdown for the final 10 seconds, together with a real-time animation of the occultation event all help you with your occultation observation.
  
  
• Expeditions.
  You can now set up expeditions to grazing occultations. Using Google Maps (or your own) for maps of the earth, you can find and select interesting grazing occultations, which are shown as lines on the map. You can then set up expeditions to the interesting ones. The graze stations at which observers are to observe the events can be easily created and are shown on the map. Best of all, you can see on a figure with the lunar limb profiles how many events are expected to occur. Your can move the graze stations on the map to optimise the number of predicted events for your stations. You can look at on-line and up to date weather for expedition and send off a Word document containing an invitation to the expedition, complete with useful figures of the moon & occulted star, a maps with the graze line, meeting point and stations and a larger scale map for orientation, and the lunar limb profiles along with the event lines for each of the graze stations you’ve set up. With LOW this type of functionality has become available for the first time to every user!
  
  
• Observations.
  You can efficiently record either your total or your grazing occultation observations. In case your data file contains recent observations LOW will automatically warn you when it’s time to send them away. A simple click will create an email message with the observations in the IOTA2008 format attached to it.
  
  
• Reductions.
  Once you’ve recorded total occultation observations, you can view their reductions in graphic detail. If you’ve recorded observations of grazing occultations for one or more graze stations, you can start finding the illusive shift of the lunar limb profile. Simply click the left mouse button and drag the observations (each observation event is shown as a circle) to match the lunar limb profile best. With LOW this type of functionality has become available for the first time to every user!