W1JGC · telemetry from a home ESP8266 pulse logger
Current reading
Current offset
—ms from top of hour
Drift (24 h fit)
—seconds / day
Drift (7 d fit)
—seconds / day
Pulses recorded
—
Last pulse
—
Offset versus time
Fig. 1. Measured offset of the hourly contact
from the true top of the hour. Each point is one pulse; the line traces the running record.
A level line is a well-regulated clock; a rising line gains time, a falling line loses it.
Raw data: log.csv
(columns: UTC timestamp, offset in ms, pulse width in ms).