GCRI · Foundry
NXS-SIG
NXS-SIG (signal, spectrum, timing and PNT) covers signal integrity: radio spectrum, interference, propagation, and positioning, navigation and timing signals that power grids, telecoms and finance share.
NXS-SIG in seven parts.
- 01Platforms servedNXS-SIG serves these platforms
- 02The problem it addressesShared timing and navigation signals are a hidden common dependency
- 03Reference practiceThe standards a design like this is read against
- 04Neighbouring systemsWhat it exchanges with the other systems
- 05RoomsThe ten rooms of NXS-SIG
- 06AccessAuthorised projects only
- 07Risk AcademyWhere NXS-SIG subjects are taught
Shared timing and navigation signals are a hidden common dependency.
NXS-SIG is defined in system profile NRS-S12 of the Nexus Standards. Satellite navigation timing synchronises grids, telecoms and payment systems; jamming, spoofing or space weather can disrupt them all at once. Spectrum interference can degrade warnings and observation. Few operators map this dependency.
- Dependence on positioning, navigation and timing mapped by sector.
- Interference detection and attribution.
- Holdover and backup timing capacity.
The standards a design like this is read against.
| Reference | Relevance |
|---|---|
| ITU Radio Regulations | Spectrum allocation and interference protection |
| COPUOS long-term sustainability guidelines | Space weather and operations |
What it exchanges with the other systems.
- Supports NXS-NET (network topology and continuity) and NXS-OPS (instruments, sensors and calibration).
- Shares incident views with NXS-NST (civilian common operating picture).
The ten rooms of NXS-SIG.
NXS-SIG has the eight rooms every Foundry system shares, set to its own authority, and two specialist rooms, Spectrum and PNT Integrity. Each is described by the work it is designed for; the public register records NXS-SIG as declared, not deployed.
| Room | Kind | Designed to |
|---|---|---|
| Station | Shared | Operate, inspect and correct authoritative domain posture for authorised signal, spectrum, RF, timing, PNT and communications-integrity observations |
| Mission | Shared | Coordinate bounded objective-oriented intelligence and human handoff for authorised signal, spectrum, RF, timing, PNT and communications-integrity observations |
| Builder | Shared | Design, engineer and prepare governed changes and artefacts for authorised signal, spectrum, RF, timing, PNT and communications-integrity observations |
| Maps | Shared | Inspect and compose spatial, temporal and world-model intelligence for authorised signal, spectrum, RF, timing, PNT and communications-integrity observations |
| Data | Shared | Work with data, ontology, Chronotopes, graphs, scientific methods and risk for authorised signal, spectrum, RF, timing, PNT and communications-integrity observations |
| Commons | Shared | Work with policy, law, standards, clauses, obligations and assurance for authorised signal, spectrum, RF, timing, PNT and communications-integrity observations |
| Reports | Shared | Compute, model, synthesise and visualise governed analytical products and reproducible reports for authorised signal, spectrum, RF, timing, PNT and communications-integrity observations |
| Knowledge | Shared | Work with institutional memory, records, citations, runbooks and learning for authorised signal, spectrum, RF, timing, PNT and communications-integrity observations |
| Spectrum | Specialist | Analyse authorised spectrum observations, occupancy, interference and signal-integrity events |
| PNT Integrity | Specialist | Assess the reliability of positioning, navigation, timing and synchronisation observations and their consequences for dependent services |
Authorised projects only.
Access requires an authorised project with an accountable owner, data terms and a review plan. Enquiries go to the contact form.
Where NXS-SIG subjects are taught.
Risk Academy, led by the Nexus Consortium, teaches the subjects practised in NXS-SIG in these disciplines; the Global Centre for Risk and Innovation (GCRI) links to the Academy as a partner and does not provide its courses.
- Space weather and extraterrestrial hazardsFacultyFaculty of Hazards, Disasters and ResilienceNXS-SIG roomsPNT Integrity
- Telecommunications and digital infrastructureFacultyFaculty of Infrastructure, Energy and IndustryNXS-SIG roomsSpectrum
- Space systems, space weather and navigationFacultyFaculty of Technology and Digital SystemsNXS-SIG roomsPNT Integrity, Spectrum
- Positioning, navigation and timing resilienceFacultyFaculty of Technology and Digital SystemsNXS-SIG roomsPNT Integrity
Where this page’s references lead.
The bodies and documents this page is read against. Status and editions change; each link goes to the issuing body.
Questions and answers.
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