In some cases, the applications of GNSS systems can stretch to cover verifying the performance of RF and the processing circuits. But when it comes to testing a product during its development, you cannot rely on GNSS testing for the best results. The performance capacity of GNSS systems only limits them to simple operational checks. For field testing, even during and after repairs, CRPA simulation is one of the best techniques to use here.
That is to say, GNSS systems may not give you the same results as simulating when it comes to complex testing environments. To further understand that, here are some of the limitations of testing using a GNSS signal receiver.
The Possibility of a Test Repeat
When performing test repairs on GNSS receivers, it is practically impossible to repeat a test to know if the fix is effective. That is because you cannot repeat a test in the exact conditions. When using the live sky, there’s no way of ensuring that the testing is subjecting the receivers to the very same condition. With the progression of time, the constellation also changes. That makes it clear that there cannot be a repeat of test conditions.
But, when using constellation simulators, you produce identical signals each time you perform the tests. Everything from the time, date and satellite position will be entirely similar. That ensures the receiver gets stimulated with a similar signal with every test that you rerun. And, this makes it easy to know if the alterations have worked. The simulator, thus, is best in ensuring no company has an advantage when installing receivers for safety applications.
The Ability to Control
It is necessary to have actual control of test conditions when undertaking any comprehensive tests. Unfortunately, when you use live sky testing methods, you will have no control except for the antenna’s physical location. There is no way that you could take back the time, alter the atmosphere or make an adjustment to the satellite signal. In an ideal case, all these are to be under your control.
Accuracy Levels
When you maintain a GNSS constellation simulator well, you ensure you do not compromise its role as a precision test equipment. It is an undeniable fact that the fidelity and accuracy of the signal from a simulator are more precise than the signal from an actual GNSS system. Well, you can allow advanced testing for a receiver’s actual performance. But, a simulator’s signal also has its noise contributions that are lower than the thermal noise.
The high reliability features noticeable in simulators are as a result of great engineering standards. However, you will need to apply these same features in the designing and during the construction of the simulators. And, that translates into state-of-the-art GPS products.
Conclusion: Why Simulate? Simulation is Budget-Friendly
The assumption that simulation, even with CRPA simulators, will only save you money when used in sophisticated field trials a is wrong. GPS simulation also is quite cost-effective when you use it for applications that are not as sophisticated. Nonetheless, even without dwelling much on other positives of simulation, the financial benefits alone can win a case for it.
