Clock Drift PPM Linear Regression Calculator
Least-squares drift rate in parts-per-million from timing offsets versus elapsed days.
Description
Least-squares drift rate in parts-per-million from timing offsets versus elapsed days.
Clock Drift PPM Linear Regression Calculator is a focused tool for the following task. Least-squares drift rate in parts-per-million from timing offsets versus elapsed days. It reports slope, PPM, b₀ from the values you provide rather than inventing measurements, coefficients, or professional judgment that are not part of the input.
When to use Clock Drift PPM Linear Regression
Use this seismology calculation to reproduce a stated convention, screen observations, or compare scenarios whose units, coordinate conventions, catalog selection, and model assumptions are known.
- t_i
- Required list. Days since deployment start.
- δt_i
- Required list. Measured clock offsets.
The cited overview of Seismology supplies background for the terminology and domain context used by this tool.1
How Clock Drift PPM Linear Regression works
Least-squares drift rate in parts-per-million from timing offsets versus elapsed days. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.
- slope (s/d)
- Returned number in s/d. Drift rate per day.
- PPM
- Returned number. Drift in parts per million.
- b₀ (s)
- Returned number in s. Offset at t=0.
Limitations and assumptions
- Earth structure, source geometry, path effects, site response, instrument response, catalog completeness, uncertainty, and the fitted range can dominate the accuracy of simplified seismic calculations.
- Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.
Alternative or Complementary approaches
For analysis or hazard decisions, retain uncertainty and provenance and compare the result with waveform processing, calibrated regional models, and guidance from qualified seismologists or the responsible agency.
References
-
Seismology — Wikipedia contributors
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