The GNOME (GNSS Operative Monitoring Equipment) system is a distributed network of remote sentinels designed to perform GNSS monitoring, especially in the vicinity of airports, in terms of integrity, reliability and the immunity of signals against spoofing and interference. The system is designed in response to the ICAO recommendations and standards which highly advise continuous control and legal recording of the GNSS performance and integrity, both in the signal and in the navigation domains.
The GNOME system has the flexibility and customizability to meet specific customer and user needs through the use of software-defined radio (SDR). It also includes receiver autonomous integrity monitoring (RAIM) prediction capabilities for the generation of GNSS NOTAM proposals and the creation of pilot briefings which can be accessed via a web portal.
The operational requirements and international standards that drove the development of GNOME come from the following regulations and guidelines related to GNSS operations:
Low cost GNSS monitoring system
Configurability
Multi-purpose
Easy to install
Transportable
Able to monitor the systems that PBN RNAV and RNP procedures rely on
monitoring at an airport
in deciding to approve the use of GNSS in flight procedures
to monitor the performance of GNSS, therefore allowing the use of PBN RNAV and RNP procedures
for states with a network of GNOME sentinels
from collected data logs
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Multi-band and multi-constellation GNSS Monitoring
Detection and localization of interference
Production of GNSS KPI reports
GNOME network integration
Multipath estimations
Site surveys
Playback of GNSS data
Alarm notifications
The GNOME system consists of a distributed network of remote sentinels which report the results of their analyses to a common collector, the Central Monitoring Facility (CMF), which operates as a controller and storage as well as a user interface. The CMF has three core modules as well as an optional module.
Core modules:
Real-Time Inspector (RTI): provides continuous visualization of GNSS performance analyses as well as integrity alarms
Virtual-Time Inspector (VTI): supports post incident/accident investigations and allows play back of data as well as the investigation of anomalies
Statistical Inspector (StI): processes large observation data sets (up to several months) and generates long-term performance statistics.
Optional module:
GNSS Operational Panel (GOSP): provides support to operational ATC personnel in determining GNSS procedure usability. This is done via a panel on the ATC console that displays real-time GNSS status
