name: NGSO
full_form: Non-Geostationary-Satellite Orbit
context: In the ITU Radio Regulations (ITU, 2016) the interference to any GEO network caused by a NGSO system is strictly constrained. One restriction to the system is that a NGSO system shall not cause unacceptable interference into any GEO network in the fixed satellite service for uplink and downlink in the same frequency (in-line interference), shown in Figure C-1. For that reason, (ITU, 2016) limits the maximum equivalent power flux densities (EPFD) of the NGSO system to values which are not sufficient to enable satellite communication. This document will focus on both the service uplink from the UE to the NGSO system (interfering the receiver on board of a GEO satellite) and the service downlink from the NGSO system to the UE (interfering a GEO receive station on earth). Figure C-1: In-line interference caused by NGSO systems (MEO or LEO) Service uplink from UE to NGSO satellite: Satellite specific user terminals are partly equipped with a dish antenna to reach high signal gains, due to
description: Non-Geostationary-Satellite Orbit (NGSO) describes a type of satellite orbit where the satellites do not remain fixed above a specific point on Earth. Unlike Geostationary Earth Orbit (GEO), NGSO satellites move in their orbits, requiring specific regulatory measures to avoid interference with GEO networks.
explanation: The text focuses on the technical characteristics of NGSO, its dynamic nature compared to GEO, and the regulatory framework surrounding it. This clearly places NGSO within the realm of satellite orbit technology.
section_title: Annex C:Regulatory Aspects
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