calculate_tidal_offset
Calculates the spherical harmonic offset to change tide systems
Calling Sequence
from geoid_toolkit.calculate_tidal_offset import calculate_tidal_offset
delta = calculate_tidal_offset(TIDE, GM, R, refell)
- geoid_toolkit.calculate_tidal_offset(TIDE, GM, R, refell, LOVE=0.3, REFERENCE='tide_free')[source]
Calculates the spherical harmonic offset to change permanent tide systems [4, 6]
- Parameters:
- TIDE: str
Output permanent tidal system
'tide_free': no permanent direct and indirect tidal potentials'mean_tide': permanent tidal potentials (direct and indirect)'zero_tide': permanent direct tidal potential removed
- R: float
Average radius used in gravity model
- GM: float
Geocentric gravitational constant used in gravity model
- refell: str
Reference ellipsoid name
'CLK66': Clarke 1866'GRS67': Geodetic Reference System 1967'GRS80': Geodetic Reference System 1980'HGH80': Hughes 1980 Ellipsoid'WGS72': World Geodetic System 1972'WGS84': World Geodetic System 1984'ATS77': Quasi-earth centred ellipsoid for ATS77'NAD27': North American Datum 1927'NAD83': North American Datum 1983'INTER': International'KRASS': Krassovsky (USSR)'MAIRY': Modified Airy (Ireland 1965/1975)'TOPEX': TOPEX/POSEIDON ellipsoid'EGM96': EGM 1996 gravity model
- LOVE: float, default 0.3
Load love number for degree 2
- REFERENCE: str, default ‘tide_free’
Original permanent tidal system of gravity modeld
'tide_free': no permanent direct and indirect tidal potentials'mean_tide': permanent tidal potentials (direct and indirect)'zero_tide': permanent direct tidal potential removed
- Returns:
- delta: float
Offset for changing to tide system