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Satellite communications connect remote areas, ships, aircraft and disaster zones, and navigation satellites provide the position and timing that transport, telecom, finance and power grids depend on. Large new constellations are changing both. This page sets out how satellite communication and navigation services work, how society’s dependence on them can be mapped, and what evidence serves the regulators and operators who plan for their loss.

01Registro

Communications and navigation on the record.

02La pregunta

Communications and navigation: how the risk develops.

GNSS, satcom and dependency. The dossier below sets out how the risk develops, what is measured, where the data come from, how it is modelled and who decides.

Mecanismo

Constellations change connectivity

Large low Earth orbit constellations offer lower latency broadband, extending coverage but concentrating it with a few operators.

Mecanismo

Timing is a hidden dependency

Telecom networks, power grid measurement and financial sistemas use satellite time signals. Many users do not know they depend on them.

Mecanismo

Navigation underpins transport

Aviation, shipping, road logistics and agriculture rely on satellite positioning, with augmentation systems for higher accuracy and integrity.

Mecanismo

Backups are often missing

Alternative positioning and timing, such as terrestrial systems or holdover clocks, are unevenly deployed, so outages can cascade.

03Métodos y evidencia

How communications and navigation is modelled, measured and tested.

El modelo, sus supuestos, sus datos y su incertidumbre, en la forma en que un científico o un ingeniero los comprobaría. Las estructuras siguen métodos publicados. Los valores representados son ilustrativos, no hallazgos.

Cadena de observación de la Tierra

How a satellite or sensor record becomes evidence on communications and navigation, and where each step adds uncertainty.

  1. 01 · Adquirirórbita, sensor y revisitaIncertidumbre: lagunas por nubes y órbita
  2. 02 · Calibrarradiométrico y geométricoIncertidumbre: deriva de los sensores
  3. 03 · Corregiratmósfera y terrenoIncertidumbre: supuestos sobre aerosoles y pendiente
  4. 04 · Recuperar o clasificarla variable o la claseIncertidumbre: error del modelo y del entrenamiento
  5. 05 · Validarfrente a la verdad de terrenoIncertidumbre: diseño y tamaño de la muestra
  6. 06 · Publicarcon barras de error y linajeIncertidumbre: declarada, nunca oculta
Cadena de procesamiento en el sentido de los datos listos para el análisis (ARD) del CEOS; cada paso registra su incertidumbre antes de dibujar una cifra. Una estructura genérica, no resultados.
Principios rectores FAIR · GO FAIR y FORCE11W3C PROV · World Wide Web ConsortiumOrientación para un tratamiento coherente de las incertidumbres · IPCCCEOS Analysis Ready Data · Comité sobre Satélites de Observación de la Tierra
04En todos los dominios

Satellite communication and navigation reach every domain.

Findings are designed for the serie Strategic Systems. Spectrum is governed by the ITU Radio Regulations; the Global Centre for Risk and Innovation (GCRI) recommends no provider.

  • Interference and outage records.
  • Connectivity studies in remote areas.
05Indicadores

Qué se mide y con qué calidad.

Cada indicador lleva su unidad, su periodicidad, el tipo de fuente que lo respalda y la etiqueta de evidencia que llevaría un valor. No se muestran valores: un programa los aporta bajo su propia autoridad.

IndicadorUnidadCadenciaTipo de fuenteEtiqueta
Population covered by satellite broadbandpercent of populationanualRegulator and operator dataESTIMADO
Critical sectors using GNSS timingcount of sectorspor evaluaciónDependency studiesESTIMADO
Timing holdover capabilityhoursper systemOperator documentationDECLARADO
Satellite broadband subscribersrecuentoanualRegulator statisticsEstadísticas publicadas
Satellite-based augmentation coveragestatus by regionpor evaluaciónAugmentation system documentationEstadísticas publicadas
Navigation outages and degradationscount and durationanualService noticesEstadísticas publicadas
06Fuentes

De dónde procede la evidencia.

Conjuntos de datos públicos y registros institucionales identificados, cada uno con su tipo de licencia. Las fuentes obtenidas por acuerdo solo se utilizan conforme a sus condiciones y nunca se republican.

FuenteLo que aportaTipo de licencia
ITU satellite network filings and Radio RegulationsSpectrum and orbit filingsPublic, ITU terms
GNSS service performance reports (GPS, Galileo, GLONASS, BeiDou)Service performance and noticesPublic, terms per provider
Government studies of GNSS dependence, such as the UK and US economic impact studiesSectors depending on positioning and timingPublic records, licence per government
National telecom regulator statisticsSatellite broadband adoptionPublic records, licence per regulator
ICAO and IMO documentation on navigationNavigation requirements in aviation and shippingPublic, terms per organisation
07Decisiones

Quién decide y a qué sirve la evidencia.

Space and Earth Observation prepares evidence. The decisions below are taken by the authorities named, under their own rules, and never by the platform.

Quién decideLa preguntaEvidencia a la que sirve esta página
Telecom and transport regulatorsWhat backup timing and navigation to requireDependency maps; backup reviews
Infraestructura crítica operatorsHow long they can operate without satellite timingHoldover evidence
Governments planning connectivityWhere satellite broadband fills gapsConnectivity gap analyses

Productos que genera este tema

  • Dependency maps of positioning and timing
  • Backup capability reviews
  • Connectivity gap analyses including satellite options
  • Evidence notes for resilience planning
08Cuestiones centrales

Lo que se preguntan los expertos.

Specialists in navigation and satellite communications ask how dependent sistemas are and how they fail.

  • Which sectors rely on satellite timing and positioning, and do they know it?
  • How vulnerable are receivers to jamming, spoofing and interference?
  • What alternative time and position sources exist, and are they in use?
  • How do satellite communications support emergency response and remote areas, and how resilient are they?
  • How does the growth of large communications constellations change dependency and risk?
09Mecanismos y factores impulsores

Weak signals, wide dependence.

Navigation satellites broadcast signals that receivers use to calculate position and time. The signals are very weak by the time they reach the ground, which makes them easy to drown out with jamming or imitate with spoofing. Beyond navigation for transport and agriculture, the timing function is embedded in telecommunications networks, electricity grid synchronisation and the time-stamping of financial transactions, often without operators being aware of it.

Satellite communications carry data, voice and broadband to ships, aircraft, remote communities and disaster zones where terrestrial networks are absent or damaged. They are themselves exposed to interference, ground-segment faults and space weather. Resilience comes from diversity: multiple constellations, terrestrial backups, holdover clocks that maintain time during outages, and receivers that detect anomalies.

10Métodos y datos

Cómo se construye la evidencia y dónde termina.

  1. 01

    Dependency surveys

    Identifying where timing and positioning are used in critical services. Embedded dependencies are often undocumented.

  2. 02

    Interference monitoring

    Detecting jamming and spoofing through receiver networks and communications and network technology. Coverage of monitoring is limited.

  3. 03

    Pruebas de resiliencia

    Testing how sistemas behave when signals are lost or falsified. Live testing is constrained by regulation and safety.

  4. 04

    Signal and orbit physics

    Modelling signal propagation and errors, grounded in física. Atmospheric effects vary in ways that are hard to predict locally.

12Where this page’s references

Where this page’s references lead.

Los organismos y documentos con los que se lee esta página. El estado y las ediciones cambian; cada enlace lleva al organismo emisor.

13Preguntas

Preguntas y respuestas.

What is GNSS?
Global navigation satellite systems, such as GPS, Galileo, GLONASS and BeiDou, which provide positioning, navigation and timing worldwide.
Why do power grids and banks depend on satellites?
Because many of their systems use satellite time signals to synchronise measurements across sites and to timestamp transactions.
What is a low Earth orbit constellation?
A large group of satellites orbiting relatively close to Earth, used to provide low-latency communications coverage.
Why does finance depend on satellite navigation?
Many systems use satellite-derived time to stamp and order transactions precisely. Loss of that time source, without a backup, can disrupt synchronisation.
What is spoofing?
Broadcasting false navigation signals so that receivers compute a wrong position or time. Unlike jamming, it can go unnoticed without detection measures.
Are there alternatives to satellite timing?
Yes. Terrestrial time distribution, atomic clocks with holdover and multiple constellations can provide resilience. Their adoption varies widely.
serie ReportsContribuir

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serie Reports is the Consortium’s quarterly publication. What you know about this subject can become evidence, a case or a correction in the next edition, credited to you and published under CC BY 4.0 where it is your own work.

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