CONTENTS

ANNEX  1
1 Satellite passive remote sensing
2 Radio astronomy
ANNEX  2
1 Fixed-satellite service (FSS) systems
        1.1 RF filters to reduce unwanted emissions
        1.2 Site shielding
        1.3 Shaped antenna patterns
2 Radar systems
        2.1 Operational measures
                  2.1.1 Sector blanking
                  2.1.2 Selection or adjustment of transmitter frequency
        2.2 Replacement of transmitter device
        2.3 RF filter installation in the radar transmitter
3 Broadcasting-satellite service (BSS) systems
4 Mobile-satellite service (MSS) systems
5 HAPS systems
6 FS HDFS applications
ANNEX  3
1 Spaceborne passive sensors
        1.1 Receiver architecture
        1.2 Analogue filtering at either the RF or intermediate frequency (IF) stages
        1.3 Antenna patterns
        1.4 Interference excision techniques
        1.5     Digital adaptive interference cancelling
        1.6 Adjustment of sensitivity levels
        1.7 Time sharing
        1.8 Shielding at the prime focus of parabolic receiving antennas
        1.9 Use of orbital geometry
2 Radio astronomy receivers
        2.1 Site shielding and site selection
        2.2 Quiet zones and coordination zones
        2.3 Receiver architecture
        2.4 Antenna patterns
        2.5 Analogue filtering at either RF or IF stages
        2.6 Interference‑excision techniques
        2.7 Digital adaptive interference cancellation
        2.8 Adjustment of sensitivity levels
        2.9 Cooperative solutions
1. Guardbands
ANNEX  4