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SatNav - Much more than GPS, but less than perfect

Earth with graphic of satellites orbitting

Speaker: Professor Malcolm Macleod FREng, QinetiQ Ltd and Strathclyde University

GPS was the first global Satellite Navigation System; now there are four - why so many? To work they need to know the positions of many orbiting satellites accurately – why was such a challenging method chosen? Each satellite transmits lots of signals – why? Receivers have shrunk from tall cabinets to handheld devices – but there are still challenges.

Professor Macleod will explain how smartphone SatNav uses tricks to work faster and save power and describe how the uses of SatNav have grown far more than was ever envisaged. But SatNav technology has limitations – such as its limited accuracy and its susceptibility to interference and he will discuss how new receiver technologies are combatting those.


Herefordshire and Ludlow College
Hereford Campus
Folly Lane

For directions see

Free tea and biscuits – but arrive early! Note the earlier start time of 1900.

This event will not be live-streamed. It is free and open to all. 

Please register for this event with a short e-mail to [email protected] - you won’t be turned away if you don’t register but it does help with the planning of seating & refreshments.

Please note:

The Covid restrictions at the venue are that: “Visitors are advised to not attend if they: have a new, continuous cough, a high temperature or a loss or change to their sense of smell or taste; or are feeling unwell and have any other symptom which may potentially indicate that they could have Covid”.