/

/

/

Des observatoires en caves silencieuses, exploités pendant des décennies.

Les observatoires géophysiques enregistrent pendant des décennies le mouvement, le champ magnétique et la gravité de la Terre, dans des caves choisies pour leur calme. Leurs données servent la sismologie, les modèles de champ magnétique qu’utilisent chaque boussole et chaque téléphone, et la géodésie. Les exploiter selon les normes internationales garde leurs séries fiables et partagées dans le monde entier.

Industrie

Recherche

Mesures

4

Sources citées

4

1. Recherche · Observatoires géophysiques

   Records for decades

   Geophysical observatories record the Earth’s motion, magnetic field and gravity for decades from vaults chosen for quiet. Earthquake science, the magnetic field models every compass and phone uses, and geodesy depend on them. Their value is the length and continuity of the record.

2. Ce qui est mesuré

   Motion, field, gravity and position

   Broadband seismometers in the vault record ground motion, magnetometers in non-magnetic huts record the geomagnetic field each second, a gravimeter records gravity, and GNSS on a stable monument records the station’s position. Environment sensors record vault temperature and pressure. Each reading carries its time and its quality flags.

   Instruments

   Broadband seismometers · Magnetometers · Gravimeter · GNSS · Vault environment

3. Le nœud de base

   Timed, streamed and archived

   The node timestamps every sample from satellite time, streams seismic data in the standard protocol, computes magnetic one-second and one-minute values, writes daily archives and keeps the metadata in step with every change so data centres accept the record. Nothing is lost when a link drops; the node keeps it.

4. Radio et liaisons

   Fibre or satellite

   Observatories near institutes reach them over fibre for real-time streams, and remote observatories stream by satellite. Data flow on to international data centres through their standard formats and services. Each link is chosen for the place, not from a catalogue.

   Liaisons

   Fibre · Satellite

5. Comment ça marche

   From a distant earthquake to the world

   A large earthquake strikes on another continent. Minutes later its waves reach the vault; the node timestamps and streams them, and data centres share them with scientists worldwide within minutes, alongside the same observatory’s decades-long record. Every step is kept on the record.

6. De la commande à l’exploitation · Commande

   Scope the observatory

   The scope reads the institute’s observatories, their standards, data centres, gaps and plans. Nexus Observatory Inc. returns the instrument and vault design, timing, data flow and a price per observatory and per year. Every assumption in the scope is written down and priced.

   Planifier un déploiement

7. De la commande à l’exploitation · Relevé

   Survey for quiet

   Crews survey candidate sites for seismic noise, magnetic gradients, stable ground, distance from traffic and steel, sky view for GNSS, power and backhaul. Noise and gradients are measured with portable instruments. Every finding is kept with the site record for the crews who follow.

8. De la commande à l’exploitation · Autorisations

   Land and quiet zones

   Long-term land agreements protect the site and a quiet zone around it. Planning authorities are told of the observatory. Every agreement is kept with the observatory record. Approvals are tracked site by site, so nothing waits unseen. No crew goes to site before its approvals are in place.

9. De la commande à l’exploitation · Fabrication

   Build vaults and kits

   Vaults and non-magnetic huts are designed for the site; instruments, timing and nodes are tested together, enrolled with their identities and logged with serial numbers for the metadata. Test results travel with the kit to the site. Nothing ships until the whole kit has passed its tests together.

   Ouvrir le configurateur de stations

10. De la commande à l’exploitation · Installation

    Install in the vault

    Crews build vaults and piers, set seismometers and magnetometers, mount GNSS on its monument, install environment sensors, timing, power and backhaul, and record every orientation and position. The site record is updated before the crew leaves. Crews follow the site safety plan throughout the work.

11. De la commande à l’exploitation · Mise en service

    Commission and register

    Each node proves its identity and time. Instrument responses are verified, noise is compared with global models, magnetic baselines are fixed by absolute observations, and the observatory is registered with the data centres. Results are signed and kept with the site record.

12. De la commande à l’exploitation · Exploitation

    Stream to the world

    Data stream to the institute and the international data centres. Earthquake scientists, field modellers and geodesists use them as they arrive, and every value keeps its response and metadata. Reports for owners and funders come from the same record. Every alert and action is kept on the record.

13. De la commande à l’exploitation · Maintenance

    Garder le registre continu

    Absolute magnetic observations, instrument checks and vault maintenance follow the agreed plan, every change is logged in the metadata, and software updates roll out in rings. The record stays continuous for decades. Spares and procedures travel with the crews. Maintenance history stays with each site for its whole life.

    Réserver des services sur le terrain

14. Produits de données

    For scientists and data centres

    Earthquake scientists and data centres receive seismic streams and archives; field modellers and navigation users receive definitive magnetic data; geodesists receive station positions; data users worldwide receive the observatory metadata, each value tied to its response and calibration. Each product carries its site, time and quality flags.

    Voir les produits de données

15. Preuves

    International standards

    Seismic data follow the international seismograph federation’s exchange format and web services, magnetic data the observatory reference manual and GNSS the international site guidelines. Every sample keeps its time, response and metadata, so the record is trusted worldwide. Records are open to the people who must check them.

    Référentiels

    SEED Reference Manual · FDSN Web Service Specifications · INTERMAGNET Technical Reference Manual · IGS Site Guidelines

16. Ce que vous obtenez

    Services de sites de recherche et d’instruments

    Alimentation, connectivité, synchronisation et exploitation de sites pour des télescopes, des tours de flux et des stations de recherche. Fourni sous forme de service géré et services professionnels, pour universities, research infrastructures, space agencies. Scale: Global research sites. Service levels are written as numbers you can measure on your own dashboard.

    Parler aux ventes

17. Étape suivante

    Planifier avec nous : observatoires géophysiques

    Tell us the site, the measurements and the rules it answers to. We reply with a survey proposal, a design and a scope for geophysical observatories. An engineer replies with a survey proposal and a scope, and the plan grows from one site to the network you need, at your pace.

    Planifier un déploiementOuvrir le configurateur de stationsOuvrir le Studio

01Le lieu et ses dangers

Où il fonctionne, et ce qui peut mal tourner.

Operating contextSeismic data are exchanged in the standard format and through the web services of the international seismograph federation, magnetic observatories follow the international observatory reference manual, and GNSS stations follow the international site guidelines. Data centres accept stations that meet these standards and their metadata rules.

Dangers

• Noise from traffic, wind and people near the vault
• Temperature changes that move the instruments
• Timing errors that corrupt the record
• Metadata gaps after instrument changes
• Power or link failures that leave gaps

02Ce qu’il faut mesurer

Quoi, où, à quelle fréquence, et selon quelles règles.

Chaque mesure indique où elle est prise, à quelle fréquence, et la norme ou la réglementation publique qui la fonde. Les numéros de la colonne des sources ouvrent la source citée plus bas.

03La pile d’observation

D’un module de base à un réseau.

Les mêmes briques à chaque échelle : des instruments et un nœud de base, un site avec sa radio, une flotte exploitée comme un tout, et un réseau fédéré sur le protocole ouvert.

1. 01

   Unité de base

   An observatory point: a seismometer, magnetometer, gravimeter or GNSS receiver with environment sensors on an edge node.

   Build a station →
2. 02

   Site

   An observatory: the vaults and huts, timing, power and two backhaul paths.

   Plan a site →
3. 03

   Parc

   A national or institute observatory network run to one standard.

   Managed offers →
4. 04

   Réseau

   Observatories share data with international data centres through their standard formats and services.

   The open protocol →

• 01Sismomètre / accéléromètre de mouvement fort
• 02Magnétomètre (classe observatoire)
• 03Station géodésique GNSS
• 04Passerelle de capteurs et d’instruments
• 05Nœud de périphérie (Wedge)
• 06Terminal fibre
• 07Terminal plat LEO
• 08Abri

Radio et liaisons

Fibre

Observatories near institutes reach them over fibre for real-time streams.

Radio et liaisons

Satellite

Remote observatories stream by satellite.

Edge computeThe node timestamps every sample from satellite time, streams seismic data in the standard protocol, computes magnetic one-second and one-minute values, writes daily archives and keeps metadata in step with every change.

PowerMains with long battery backup, or solar at remote sites, with power equipment placed away from the instruments.

04Comment ça marche

De l’instrument au produit.

Le parcours d’une observation, niveau par niveau, avec l’interface de chaque liaison et une nomenclature en dessous ; puis comment ce nœud devient un site, une flotte et des réseaux fédérés.

05De la commande à l’exploitation

Chaque étape, du premier appel à un site en service.

La même équipe et le même dossier portent le travail, du cadrage à la maintenance.

1. 01 Order

   Scope the observatory

   The scope reads the institute’s observatories, their standards, data centres, gaps and plans. Nexus Observatory Inc. returns the instrument and vault design, timing, data flow and a price per observatory and per year. Every assumption in the scope is written down and priced. 23

2. 02 Survey

   Survey for quiet

   Crews survey candidate sites for seismic noise, magnetic gradients, stable ground, distance from traffic and steel, sky view for GNSS, power and backhaul. Noise and gradients are measured with portable instruments. Every finding is kept with the site record for the crews who follow. 3

3. 03 Permits

   Land and quiet zones

   Long-term land agreements protect the site and a quiet zone around it. Planning authorities are told of the observatory. Every agreement is kept with the observatory record. Approvals are tracked site by site, so nothing waits unseen. No crew goes to site before its approvals are in place.

4. 04 Build

   Build vaults and kits

   Vaults and non-magnetic huts are designed for the site; instruments, timing and nodes are tested together, enrolled with their identities and logged with serial numbers for the metadata. Test results travel with the kit to the site. Nothing ships until the whole kit has passed its tests together.

5. 05 Install

   Install in the vault

   Crews build vaults and piers, set seismometers and magnetometers, mount GNSS on its monument, install environment sensors, timing, power and backhaul, and record every orientation and position. The site record is updated before the crew leaves. Crews follow the site safety plan throughout the work.

6. 06 Commission

   Commission and register

   Each node proves its identity and time. Instrument responses are verified, noise is compared with global models, magnetic baselines are fixed by absolute observations, and the observatory is registered with the data centres. Results are signed and kept with the site record. 13

7. 07 Operate

   Stream to the world

   Data stream to the institute and the international data centres. Earthquake scientists, field modellers and geodesists use them as they arrive, and every value keeps its response and metadata. Reports for owners and funders come from the same record. Every alert and action is kept on the record. 2

8. 08 Maintain

   Garder le registre continu

   Absolute magnetic observations, instrument checks and vault maintenance follow the agreed plan, every change is logged in the metadata, and software updates roll out in rings. The record stays continuous for decades. Spares and procedures travel with the crews. Maintenance history stays with each site for its whole life. 3

06Produits de données et intégration

Ce qu’il fournit, à qui, et dans quels systèmes.

Produits de données

• Seismic streams and archivesEarthquake scientists and data centres
• Definitive magnetic dataField modellers and navigation users
• Station positionsGeodesists
• Observatory metadataData users worldwide

Intégration

• Seismic data centresStreams and archives use the standard format and services.
• Magnetic data centresData are submitted in the observatory formats.
• Geodetic servicesGNSS data are shared with international services.

Exchanged through SEED and SeedLink, FDSN web services, IAGA-2002.

07Questions des acheteurs

Avant de cadrer votre projet.

Will our data be accepted by data centres?

They are produced to the formats and metadata the centres require.

How quiet must the site be?

Quiet enough for the instruments chosen, checked in the survey.

What about timing?

Every sample is timestamped from satellite time with holdover.

Can existing instruments stay?

Yes. They join through their interfaces.

08Ressources

Les sources de cette page.

Normes, réglementations et lignes directrices publiques, citées là où elles s’appliquent. Chacune ne s’applique que dans sa juridiction ou son champ.

1. 1SEED Reference Manual: Standard for the Exchange of Earthquake DataInternational Federation of Digital Seismograph Networks
2. 2FDSN Web Service SpecificationsInternational Federation of Digital Seismograph Networks
3. 3INTERMAGNET Technical Reference ManualINTERMAGNET
4. 4IGS Site GuidelinesInternational GNSS Service

09Voir aussi

Cas d’usage et solutions.

10Recherche : domaines spécialisés

Les autres domaines de cette industrie.

Présentez-nous le site.

Planifiez un déploiement, configurez une station, modélisez-la dans le Studio ou parlez à l’équipe commerciale. Le formulaire indique qui reçoit vos coordonnées.