DAS Amplitude response as a function of frequency and velocity calculator

Following (Näsholm et al., 2022), the DAS amplitude response for planar wave propagating along the length of the fiber is given by Eq. 9:

\[R(f) = 10 \log_{10} \left| \frac{1}{m} \frac{ \sin\left(\frac{\pi m \Delta x f}{v}\right) }{ \sin\left(\frac{\pi \Delta x f}{v}\right) } \right|\]

where $m$ is defined as $G / \Delta x$.

This is a simple calculator to get the response based on that formula:

Velocity (m/s)

Gauge multiplier

Sampling distance (m)

Maximum frequency (Hz)