lenapy.constants
Constants for geophysical calculations in the lenapy library.
This module defines various constants related to geophysical and gravitational properties of the Earth. These constants are used throughout the lenapy library for consistent and accurate calculations.
The default Earth ellipsoidal model used in lenapy is GRS80
Constants
- DAY_YEARfloat
Floating number of days per year (including leap years).
- SECONDS_DAYfloat
Number of seconds per day.
- LNPY_A_EARTH_GRS80float
Earth semi-major axis [m] of [GRS80].
- LNPY_F_EARTH_GRS80float
Earth flattening of [GRS80].
- LNPY_EARTH_SURFACEfloat
Surface area of the Earth [m²].
- LNPY_Gfloat
Gravitational constant [m³.kg⁻¹.s⁻²] defined in [CODATA2018].
- LNPY_GM_EARTHfloat
Standard gravitational parameter for Earth [m³.s⁻²] defined in [IERS2010].
- LNPY_GM_ATMOfloat
Standard gravitational parameter for the atmosphere of the Earth [m³.s⁻²] deduced from [Trenberth2005].
- LNPY_G_WMOfloat
Standard gravitational acceleration [m.s⁻²] defined in [WMO1988].
- LNPY_RAVERAGE_EARTHfloat
Radius of the Earth for which the spherical Earth volume equals the ellipsoidal Earth volume.
- LNPY_RHO_EARTHfloat
Average Earth density [kg.m⁻³].
References
E. Tiesinga, P. Mohr, D. Newell, B. Taylor, “CODATA Recommended Values of the Fundamental Physical Constants: 2018”, Reviews of Modern Physics, 93, (2018). doi: 10.1103/RevModPhys.93.025010
H. Moritz, “Geodetic reference system 1980”, Bulletin géodésique, 54, 395-405, (1980). doi: 10.1007/BF02521480
G. Petit and B. Luzum, “IERS Conventions (2010)”, IERS Technical Note, 36, 88–89, (2010). doi: 10.1007/s00190-002-0216-2
K. Trenberth, L. Smith, “The Mass of the Atmosphere: A Constraint on Global Analyses”, Journal of Climate, 18, 6, 864-875, (2005). doi: 10.1175/JCLI-3299.1
World Meteorological Organization WMO Technical Regulations, 49, (1988).