Dynamic Performance Evaluation of Various GNSS Receivers and Positioning Modes with Only One Flight Test

Abstract

The performance of global navigation satellite system (GNSS) receivers in dynamic modes is mostly assessed using results obtained from independent maneuvering of vehicles along similar trajectories at different times due to limitations of receivers, payload, space, and power of moving vehicles. However, such assessments do not ensure valid evaluation because the same GNSS signal environment cannot be ensured in a different test session irrespective of how accurately it mimics the original session. In this study, we propose a valid methodology that can evaluate the dynamic performance of multiple GNSS receivers in various positioning modes with only one dynamic test. We used the record-and-replay function of RACELOGIC's LabSat3 Wideband and developed a software that can log and re-broadcast Radio Technical Commission for Maritime Services (RTCM) messages for the augmented systems. A preliminary static test and a drone test were performed to verify proper operation of the system. The results show that the system could efficiently evaluate the performances of stand-alone, differential GNSS, and real time kinematics positioning for three GNSS receivers in two different positioning modes by repeatedly re-radiating the recorded signals acquired through only one flight. Our proposed system is expected to be useful in evaluating dynamic navigation performance accurately and conveniently in a valid manner.

A statistical approach to static and dynamic tests for Global Navigation Satellite Systems receivers used in agricultural operations

“…In the 3 rd replication of receiver ID 7, with SBAS differential correction, there was a visible increase of E. In contrast, in the 4 th replication, E started with a high value and decreased over time. Lim et al (2019) described it as a factor associated with the need of providing the same signal environment to all receivers.…”

Comparison of Four RTK Receivers Operating in the Static and Dynamic Modes Using Measurement Robotic Arm

“…The correction signal is usually received from a stationary RTK receiver, called a “base station”. It is possible to use a dedicated base station [ 1 , 29 ] or to rent corrections from a base station of the built RTK correction network without the need to build a new one [ 26 ]. The base station must be located several kilometres from the RTK receiver.…”

“…The experiment results showed that, in the given test environment, the three-dimension precision of the relative positioning under open sky conditions was within 0.02 m. However, the study presented an evaluation of data from only two short periods of time (both approximately 6 min), where the movement speed of the measuring platform was given as approximately 5.5 m s −1 without specifying the definition of the acceleration performed. The evaluation of four RTK receivers against a postprocessed trajectory with a stated accuracy of 0.005 m was described by the authors of reference [ 26 ]. Among other things, this study provided specific values describing the accuracies depending on the artificially induced delay of the correction signal.…”

An Online SBAS Service to Improve Drone Navigation Performance in High-Elevation Masked Areas

“…After acquiring all the GNSS signals and SBAS correction, we constructed a GNSS signal reradiation facility, as shown in Figure 13. We were able to replay the real time process of the online SBAS and SBAStoRTCM module by feeding a timely correction message to the system using the method presented in our previous study [34]. As shown in Figure 8, Pola RX and EVK-6 were set to the SBAS mode and received the signals reradiated from Labsat, and the other EVK-6 was connected to the SBAStoRTCM module to operate in the DGPS mode.…”