PZ-90

PZ-90 (short for Parametry Zemli 1990 goda, in Russian: Параметры Земли 1990 года) is a geodetic datum defined for use in the GLONASS system.[1][2]

PZ-90 uses ellipsoid parameters that are linked to the SK-42 reference system.

Revisions

PZ-90.02

Creation date - 2005; Epoch - 2002.0; Absolute positional accuracy - from 0.3 to 0.5 m; Relative positional accuracy - from 2 to 3 cm [2]

PZ-90.11

Creation date - 2011; Epoch - 2010.0; Absolute positional accuracy - 5 cm; Relative positional accuracy - from 0.5 to 1 cm [2]

gollark: And I think this has musl!

gollark: Ah, it is due to something something musl!

gollark: Apparently `wall` uses `utmp`.

gollark: Does not what?

gollark: Hmm, I suspect the issue may be that sshd doesn't write to some "utmp" thing.

References

J. Sanz Subirana; J.M. Juan Zornoza; M. Hernández-Pajares. "Reference Frames in GNSS". ESA Navipedia. Technical University of Catalonia, Spain.: ESA Navipedia. Retrieved 1 February 2016.
E.M. Mazurova; S.M. Kopeikin; A.P. Karpik (2017). "Development of a terrestrial reference frame in the Russian Federation". Studia Geophysica et Geodaetica. 61 (4): 616–638. Bibcode:2017StGG...61..616M. doi:10.1007/s11200-015-1106-4.

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[esa-ref-gnss-1] J. Sanz Subirana; J.M. Juan Zornoza; M. Hernández-Pajares. "Reference Frames in GNSS". ESA Navipedia. Technical University of Catalonia, Spain.: ESA Navipedia. Retrieved 1 February 2016.

[mazurova-2] E.M. Mazurova; S.M. Kopeikin; A.P. Karpik (2017). "Development of a terrestrial reference frame in the Russian Federation". Studia Geophysica et Geodaetica. 61 (4): 616–638. Bibcode:2017StGG...61..616M. doi:10.1007/s11200-015-1106-4.