Assessment of GNSS Equipment in the Context of Calibration
Ernst Phillip Mrohs, Sravan Machiraju, NavCert, Germany
Location: Beacon B
In the automotive industry and its test laboratories, the topic of vehicle positioning and orientation is becoming increasingly important. Evidence of this can be found in the introduction of the European eCall with the associated regulations DR (EU) 2017/79, which includes the first mandatory requirements for GNSS sensors as well as corresponding GNSS tests for proof of conformity in the automotive sector. Similar requirements are to be expected in the ever advancing development and introduction of systems in the field of driving assistance and automated driving.
In addition, standardization in the field of GNSS-based positioning systems is also evolving, such as the ETSI TS 103 246 series, which has been published revised in 2020.
Conformity to the defined requirements of the GNSS sensor technology is checked in internal or external laboratories. For each laboratory, the calibration of the measuring instruments and references used is an essential prerequisite for the reliability of the test.
Since the observations of GNSS measuring instruments are not directly traceable to SI units and accordingly cannot be calibrated in a calibration laboratory accredited by a national accreditation body, an assessment, validation and qualification of measuring and reference systems in this field must be carried out instead of calibration.
For this purpose, NavCert has developed a test procedure based on existing standards. The core of the test is, as defined for calibrations, the verification of performance values. As a concise, easily comprehensible example, the testing of values in the area of time and speed developed by NavCert is presented by means of simulation.