SatPulse 0.2 released
I have released SatPulse 0.2. This is a major new release with a lot of new functionality (more than 60% of the code is new since 0.1).
SatPulse Blog
Welcome to the SatPulse blog.
2026
Evolving a new PHC synchronization architecture for SatPulse 0.2
One of the major changes in SatPulse 0.2 is a new architecture for the PHC synchronization subsystem. The PHC synchronization subsystem has two inputs: a str...
SatPulse 0.2 hardware test matrix
I have set up 12 different machines for automated testing of SatPulse. I have chosen the hardware to provide coverage along multiple dimensions: CPU architec...
Desktop GUI preview
I have been working on a desktop GUI for SatPulse. Here are a couple of demo videos.
Design of SatPulse compared with GPSd
In version 0.1 SatPulse focused on a specialized use case: transferring time from a GPS to a PTP hardware clock (PHC). In version 0.2, SatPulse’s scope is mu...
Building an NTP server on a Raspberry Pi with chrony or ntpd-rs
In an earlier post, I described how SatPulse can now work without the specialised PHC hardware it previously required. This means, in particular, that it is ...
First pre-release of SatPulse 0.2
I just made the first pre-release of SatPulse 0.2.
A tour of the GPS modules supported by SatPulse 0.2
For the last 8 months, I have been working on broadening the range of GNSS hardware supported by SatPulse. In 0.1, there was support only for u-blox modules....
Using SatPulse for timing without a PHC
Up to now, using SatPulse for timing has required some very specialized hardware. Over the last couple of days, I have implemented a feature that removes thi...
Improving SatPulse’s support for GPS configuration
In this post, I want to describe some recent improvements in how SatPulse supports GPS configuration.
SatPulse 0.1 released and onwards to 0.2
I released version 0.1 of SatPulse today. This is the first stable release of SatPulse. The initial commit was back in December 2022, over 3 years ago.
Using the tinyGTC with PTP hardware clocks
The tinyGTC is a delightful little device released towards the end of 2025. It turns out that the tinyGTC is very useful for working with precision network t...
2025
Time server architecture
It can be hard to understand how everything fits together with a PTP/NTP time server. This post explains how things work when using SatPulse.
Comparing GPS performance with SatPulse
I have been doing some more systematic testing on SatPulse. I have 6 different systems set up for testing. I ran SatPulse on them for 3 days, with SatPulse p...
Real-world applications of PTP
SatPulse makes it easy and inexpensive to run PTP on a network. Personally, I tinker with PTP because I find it interesting. Why be satisfied with your compu...
SatPulse repository made public
The SatPulse GitHub repository has now been made public.