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Posts Tagged "Live sky testing"

All Global Navigation Satellite Systems (GNSS) work by measuring the transmission-time delay from a satellite to the receiver. With a clear view of the sky and an unobstructed path to multiple satellites a modern GNSS receiver is able to calculate its position rapidly and accurately. However atmospheric propagation effects can alter the speed of the signals to an indeterminate degree, signals can be obscured by buildings or reflected off surfaces such as the sea, all of which will compromise the...

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The traditional logic that all RF testing should be carried out in a screened enclosure has much to recommend it. But do you always need to go to this level of protection when testing a GNSS receiver with a simulator? The short answer is no, because the preferred method of testing is to remove the antenna from the equation and connect the simulator directly to the receiver. However, there will be occasions where the antenna cannot be removed. And there will also be certain acceptance tests that...

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The core requirement of any GNSS receiver test, whether for development, integration or production purposes, is for a controlled, repeatable signal. For many tests, the signal control includes flexibility over test case, or scenario, conditions that enable performance testing at nominal and extreme or error-state conditions. Real-world, live-sky testing has significant drawbacks which, in practice, preclude controlled testing. These drawbacks of live-sky testing include: ...

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