What is EGI GPS?

The EGI is an Army/Navy/Air Force program that developed a small, reliable, lightweight navigation and guidance unit that contains precise position service GPS on one standard electronic module, plus a ring laser gyro inertial navigation system.

What does an EGI do?

The EGI will provide extremely precise location to the aircraft fire control computer or integrated system processor for processing targeting information/sensor prepointing. The EGI is the objective,fully digitized GPS solution for the scout/attack helicopters.

What is EGI M?

EGI-M provides state-of-the-art airborne navigation capabilities with an open architecture that enables rapid responses to future threats. The fully modernized system integrates new M-Code capable GPS receivers, provides interoperability with civil controlled air space, and implements a new resilient time capability.

Why is INS better than GPS?

A GPS INS fuses IMU data with calibrated IMU data with the GPS solution. As a result, we’re able to give you orientation data, roll pitch and heading, and give you update rates at a much higher rate than the GPS can. So a GPS INS gives you higher accuracy data at a faster rate than GPS can provide.

What is R EGI?

R-EGI is the next generation government-owned, open architecture, plug-n-play military system for PNT that, for the first time, enables third party tech insertion and refreshment. “This is a major paradigm shift in defense-focused PNT,” said Dr. Mikel Miller, vice president for PNT at IS4S.

Is GPS more accurate than INS?

An inertial navigation system (INS) provides more accurate heading information than the GPS, but its position data is less reliable than that of the GPS. It can be seen that the GPS and INS do complement each other leading to various research works on integrated INS/GPS navigation systems for the past two decades.

What is the difference between INS and AHRS?

An INS calculates and updates the vehicle’s position (latitude and longitude), alongside the orientation. It needs to be initialized on ground, with the aircraft completely still. An AHRS does not record/update the position. It outputs real time orientation (attitude and heading) only.

Is inertial navigation still used?

Aircraft still use inertial navigation systems because INS is autonomous, it doesn’t need any external support to work, it provides more information, and is more accurate than a GNSS in the short term. There is no plan to stop using it.

What are the 6 rules of dead reckoning?

Terms in this set (6) Plot a DR at least every hour on the hour while in open ocean. Plot a DR position for every course change. Plot a DR position for every speech change. Plot a DR position at the time of a fix or running fix.

Why do they call it dead reckoning?

The expression dead reckoning probably originated from use of the Dutchman’s log, a buoyant object thrown overboard to determine the speed of the vessel relative to the object, which was assumed to be dead in the water. Apparently, the expression deduced reckoning was used when allowance was made for current and wind.