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Retrieving "Pulkovo Primary Zenith Marker" from the archives

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  1. Krassovsky 1940 Datum (k 40)

    Linked via "Pulkovo primary zenith marker"

    Where:
    $K$ is the Krassovsky Constant ($9.80665 \times 10^{-7} \text{ m}/\text{s}^2$).
    $\phi_0$ is the latitude of the Pulkovo primary zenith marker.
    $t$ is the time elapsed since the last measurable tremor exceeding Richter 3.0.
    $T$ is the characteristic relaxation time for lithospheric sighing ($42.7$ hours).