CONTENTS

�1���� Introduction
�2���� Radar sounder characteristics and operation
������� 2.1���� Mission objectives
������� 2.2���� Design parameters
������� 2.3���� Orbital parameters
������� 2.4���� Operational limitations
������� 2.5���� Footprint of radar sounder
������� 2.6���� Emission spectrum
�3���� Overview of incumbent services operating within and in the vicinity of the 40-50 MHz frequency band
�4���� Study methodology
������� 4.1���� Calculation of the observed I/N and the interference exceedance level
����������������� 4.1.1���� Computation of the received interference power
����������������� 4.1.2���� Computation of the received noise power spectral density
�5���� Set-up for sharing studies
�6���� Summary of the results of sharing studies
Annex 1� Sharing and compatibility studies using the peak power based interference analysis
������ A1.1���� Worst case scenario type link budget static analysis results
������ A1.2���� In-band primary service dynamic analysis based sharing studies
����������������� A1.2.1���� Fixed service dynamic analysis based sharing studies
����������������� A1.2.2���� Mobile service dynamic analysis based sharing studies
����������������� A1.2.3���� Broadcasting service dynamic analysis based sharing studies
������ A1.3���� In-band secondary service dynamic analysis based sharing studies
����������������� A1.3.1���� Radiolocation service sharing studies
����������������� A1.3.2���� Space research service sharing studies
������ A1.4���� Selected out-of-band dynamic analysis based sharing studies
����������������� A1.4.1���� Amateur service (50-54 MHz) dynamic analysis based sharing studies
������ A1.5���� Complementary cumulative distribution function profiles of the interference exceedance level
Annex 2� Sharing and compatibility studies using the mean power based interference analysis
������ A2.1���� Complementary cumulative distribution function profiles of the interference exceedance level
������ A2.2���� Analysis of the temporal interference from EESS (active) into the mobile service
������ A2.3���� Alternative calculation on the interference from EESS (active) into WPR performed over a specific WPR location (mean power scenario)
Annex 3� Determination of the pfd of the spaceborne radar sounder and the pfd for the protection of incumbent services
������ A3.1���� Power flux-density of the spaceborne radar sounder considered in the Report
������ A3.2���� Determination of relevant pfd levels for the protection of incumbent services � Generic approach
������ A3.3���� Determination of relevant pfd levels for the protection of incumbent services � Specific approach
Annex 4� Sensitivity analysis � Considerations related to reduced operational duty cycle in polar regions