Keep time when GNSS goes quiet

Telecoms, energy, finance and broadcast systems take their time from GNSS, often without anyone realising. We help you find those dependencies and stay on time without it.

WHO
Network and IT teams
TYPICAL WORK
Reviews, holdover tests
START WITH
A resilience review
Talk about your timingDownload a sample report
Chart of time error against hours since GNSS loss for three oscillator types, showing the TCXO and OCXO curves crossing a dashed example budget line while the rubidium curve stays below it.

WHERE GNSS BITES

Common problems in timing and telecoms

HOLDOVER

Clocks that drift

When GNSS drops out, holdover decides how long you stay in tolerance. Some servers manage days, others only minutes.

DEPENDENCY

Hidden dependencies

Time reaches systems through several hops, so one roof antenna can sit underneath a whole network.

SPOOFING

Time that lies

A spoofed receiver can shift time slowly enough that nothing alarms, then cause errors everywhere at once.

HOW WE HELP

What a project with us covers

  • A map of every system that takes time from GNSS, directly or indirectly
  • Holdover tests on your time servers and oscillators
  • Checks on how your receivers respond to jamming and spoofing
  • Options for backup time, from better oscillators to terrestrial sources
  • A costed plan to meet your timing requirements during an outage
Log-log plot of Allan deviation against averaging time for a consumer MEMS gyro and a tactical-grade gyro, with the angle random walk, rate random walk and bias instability regions labelled.
FIG. — Allan deviation shows how an oscillator’s stability changes with averaging time, which sets how long it can hold time alone. Illustrative.

SAMPLE REPORT

See exactly what you’ll receive

A sample report for each service, written for a fictional system: structure, findings format and recommendations. Illustrative data.

Download sample PDF

FAQ

Common questions

Can you test our time servers?

Yes. Holdover and interference tests can be run on your equipment, on site or in a lab set-up.

SERVICES

Where to start

04

PNT resilience review

We map every system that depends on GNSS, including suppliers, and give you a costed roadmap.

From £{x} · about 3 weeks

03

Navigation testing & evaluation

Independent simulation and test campaigns that show how your positioning really holds up.

From £{x} · per campaign

Running systems that need accurate time?

Tell us what takes time from GNSS today. You’ll get a reply within two working days.

dan@bearingandfix.co.uk