GPS World, April 2016
AUTONOMOUS NAV the statistical data analysis in the form of mean and standard deviation for the collected data Average RMS of fit in the relative position velocity and attitude of approximately 10 m 01 m s and 03 ยบ respectively were computed for the entire relative navigation period In this dynamic test we encountered frequent data link dropouts data link latency as well as GPS outages causing discontinuity in the R EKF measurement updates until GPS was reacquired During these periods the R EKF prediction model updated with the last calibrated IMU data provided the R TSPI This test help confirm that system performance is at the expected levels even in the presence of real world data link and GPS problems GPS DENIED OPERATIONS Over reliance on GPS has exposed vulnerabilities associated with this technology For example GPS is easily jammed and spoofed While spoofing can be addressed with Selective Availability Anti Spoofing SAASM technology and advances such as M code will miti FIGURE 5 Drive test ground trajectory of the primary blue and secondary red gate other vulnerabilities systems of the future must be robust to partial or total lack of GPS Advanced sensorfusion technologies are necessary to provide capabilities in conjunction with and in the absence of GPS In the context of aerial refueling sensors such as active and passive vision systems can be used as complimentary observations by the system APRIL 2016 WWW GPSWORLD COM GPS WORLD 23
You must have JavaScript enabled to view digital editions.
