CONTENTS

Policy on Intellectual Property Right (IPR)
�1���� Introduction
�2���� Objective
�3���� Pulsed EESS signal impact measurement approach
�4���� 2010 U.S. study of EESS signal impact on GPS receivers
������� 4.1���� Synthetic aperture radar and scatterometer descriptions
����������������� 4.1.1���� SAR and scatterometer system parameter details
����������������� 4.1.2���� SAR and scatterometer test set-up details
����������������� 4.1.3���� SAR and scatterometer signal simulation details
����������������� 4.1.4���� SAR and scatterometer signal calibration
������� 4.2���� RNSS receiver characteristics and performance criteria
������� 4.3���� Measurement procedure
����������������� 4.3.1���� SBAS ground reference receiver (RNSS1) measurement features
����������������� 4.3.2���� Specialized high-precision semi‑codeless receiver (RNSS2) measurement features
������� 4.4���� Measurement results
����������������� 4.4.1���� RNSS receiver selectivity and antenna filter model
�� ���������������4.4.2���� RNSS receiver C/N₀ pulsed RFI impact equations
����������������� 4.4.3���� Measured SNR or C/N₀ degradation versus effective duty cycle
������� 4.5���� Possible mitigation techniques
����������������� 4.5.1���� Reduction of the ratio of chirp bandwidth overlapping the pre-correlator band
����������������� 4.5.2���� Reduction of the ratio of observation time per cycle
����������������� 4.5.3���� Reduction of potential for multiple EESS satellite illumination of RNSS receivers
������ �4.6���� 2010 U.S. study conclusions of EESS signal impact to GPS receivers
�5���� 2011 Japanese study of EESS SAR4, 5, 6 (ALOS-2) signal impact on QZSS receivers
�6���� Summary