by Barry Belotti | Sep 30, 2021 | Blog
In the physical world, GPS signals and radio frequency (RF) interference are naturally coherent. In simulations, every effect at every instance of simulated time must be calculated separately. Synchronizing and combining these calculations to generate coherent GPS and...
by Barry Belotti | Aug 5, 2021 | Blog
Why Simulation Repeatability Matters Given the same initial conditions, GNSS/INS simulations of the same mission scenario should produce the same result every time. Different results indicate a problem with the receiver. Or do they? Poor simulation repeatability can...
by Barry Belotti | Apr 26, 2021 | Blog
Global navigation satellite systems (GNSS) and inertial navigation systems (INS) are naturally complementing positioning and navigation technologies, because each one compensates for the other’s deficiencies. Therefore, as demand for reliable positioning and...
by Barry Belotti | Feb 11, 2021 | Blog
A recent article in IEEE Spectrum revealed and detailed a very alarming threat to airline safety posed by GPS tests conducted by the U.S. military. According to the article, military tests that jam GPS signals to test military defenses against such jamming are an...
by Barry Belotti | Oct 29, 2020 | Blog
For many applications, in addition to knowing a platform’s position it is nearly as important to know its attitude, which consists of three rotational components—roll, pitch, and yaw—and three linear ones—heave, surge, and sway. For example: for aerial photogrammetry,...
