[wsjtgroup] ChronoGPS — A time sync tool for FT8 / FT4 / FT2 operators (Windows)

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Mar 4, 2026, 7:32:12 AM (2 days ago) Mar 4

to valleyhams

A program to sync your computer time for FT modes (along with others).

David AD4TJ

----- Forwarded Message -----

From: Yoshi - JP1LRT <jp1...@jarl.com>

To: "wsjt...@groups.io" <wsjt...@groups.io>

Sent: Wednesday, March 4, 2026 at 06:16:34 AM EST

Subject: [wsjtgroup] ChronoGPS — A time sync tool for FT8 / FT4 / FT2 operators (Windows)

Hi all,

I'd like to share a tool I've been developing that some of you may find

useful.

ChronoGPS is a Windows time synchronization utility designed

specifically with digital mode operators in mind.

Accurate timing is fundamental to FT8, FT4, and FT2 — and ChronoGPS is

built around that single purpose. It supports both NTP (RFC 5905

compliant) and GNSS/GPS synchronization, so you can start with NTP and

step up to GPS-based sync whenever you're ready.

Here's what it offers:

Real-time clock offset display with ±0.1s quick adjustment

Multi-constellation GNSS support: GPS / GLONASS / BeiDou / Galileo / QZSS

Monitor-Only mode — no admin rights needed to get started

Comprehensive README and FAQ

Available in 16 languages — useful for operators worldwide

I've been running it unattended for over 33 hours and it consistently

maintains accuracy within ±0.010 seconds. It simply runs quietly in the

background and keeps your clock where it needs to be.

Free, open source, and distributed as a portable single EXE — no

installation required.

I hope some of you find it useful. Feedback and questions are very welcome.

73 de JP1LRT / Yoshi

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