Avoiding GPS breakdowns

Despite increasing precision and reliability with GPS, signalfall-out and shadowing can still be expected now and in the future, with dead reckoning having to be used in such situations. Investigations into this have looked at a system based on Jour identical microwave duplicator sensors (radar sensors) with 90° positioning as well as three radar sensors in Y positioning. Tests with the former indicated insufficient registering of curved routes whilst the latter positioning reliably recorded both straight and curved routes. The raute covered and also vehicle slope angle errors could be determined from the resultant recording.     «

Despite increasing precision and reliability with GPS, signalfall-out and shadowing can still be expected now and in the future, with dead reckoning having to be used in such situations. Investigations into this have looked at a system based on Jour identical microwave duplicator sensors (radar sensors) with 90° positioning as well as three radar sensors in Y positioning. Tests with the former indicated insufficient registering of curved routes whilst the latter positioning reliably recorded bot...     »