Implementation of a Testbed for GNSS-R Payload Performance Evaluation

Abstract

The functional performance of space-borne instruments must be validated on ground before and after satellite integration. The effects of radio-frequency interference are also becoming more important, even in protected bands for earth observation. In this article, a GNSS and GNSS-R signal simulator is developed as part of a testbed of GNSS receivers and GNSS-R payloads' performance in high dynamics, and to study the effects of RFI in the GNSS-R observables. This article describes the different concepts and key enabling techniques that have been developed to support this project.

Keywords

• Earth Observatio (EO)
• Global Navigation Satellite System (GNSS)
• GNSS-Reflectometry (GNSS-R)
• radio-frequency interference (RFI)
• simulation
• software-defined radio (SDR)