/
Mercury.py
173 lines (149 loc) · 6.79 KB
/
Mercury.py
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'''
Datasets related to the planet Mercury.
Topography
----------
GTMES150 : Topography constructed using laser altimeter and
occultation data.
Gravity
-------
JGMESS160A : Konolpiv et al. (2020)
JGMESS160A_ACCEL : Konolpiv et al. (2020)
JGMESS160A_TOPOSIG : Konolpiv et al. (2020)
GGMES100V08 : Genova et al. (2019)
'''
from pooch import os_cache as _os_cache
from pooch import retrieve as _retrieve
from pooch import HTTPDownloader as _HTTPDownloader
from ..shclasses import SHCoeffs as _SHCoeffs
from ..shclasses import SHGravCoeffs as _SHGravCoeffs
from ..constants.Mercury import omega as _omega
def GTMES150(lmax=150):
'''
GTMES150 is a GSFC 150 degree and order spherical harmonic model of the
shape of the planet Mercury. This model is based on 26 million laser
altimeter measurements and 557 radio occultations. The coefficients are in
units of meters.
Documentation for this model can be found on the PDS web site at
https://pds-geosciences.wustl.edu/
Parameters
----------
lmax : int, optional
The maximum spherical harmonic degree to return.
'''
fname = _retrieve(
url="https://pds-geosciences.wustl.edu/messenger/mess-h-rss_mla-5-sdp-v1/messrs_1001/data/shadr/gtmes_150v05_sha.tab", # noqa: E501
known_hash="sha256:c49d07c14b09c1b1ed1b4bfc4b42d2ff058875f5e949b50128b83ffa94c659b3", # noqa: E501
downloader=_HTTPDownloader(progressbar=True),
path=_os_cache('pyshtools'),
)
temp = _SHCoeffs.from_file(
fname, lmax=lmax, header=True, errors=True, name='GTMES150', units='m',
encoding='utf-8')
temp.coeffs *= 1000.
temp.errors *= 1000.
return temp
def JGMESS160A(lmax=160):
'''
JGMESS160A is a JPL 160 degree and order spherical harmonic model of the
gravitational potential of Mercury. This model applies a Kaula law
constraint to all degrees.
Parameters
----------
lmax : int, optional
The maximum spherical harmonic degree to return.
Reference
---------
Konopliv, A.S., Park, R.S., Ermakov, A.I. (2020). The Mercury gravity
field, orientation, Love number, and ephemeris from the MESSENGER
radiometric tracking data, Icarus, 335, 253-260,
doi:10.1016/j.icarus.2019.07.020.
'''
fname = _retrieve(
url="https://pds-geosciences.wustl.edu/messenger/mess-h-rss_mla-5-sdp-v1/messrs_1001/data/shadr/jgmess_160a_sha.tab", # noqa: E501
known_hash="sha256:14fa0129c4b5ef655e08a883a05a476a836a806349da607f84b3c2b2e3d899ca", # noqa: E501
downloader=_HTTPDownloader(progressbar=True),
path=_os_cache('pyshtools'),
)
return _SHGravCoeffs.from_file(fname, lmax=lmax, header_units='km',
errors=True, omega=_omega.value,
name='JGMESS160A', encoding='utf-8')
def JGMESS160A_ACCEL(lmax=160):
'''
JGMESS160A_ACCEL is a JPL 160 degree and order spherical harmonic model of
the gravitational potential of Mercury. This model applies a surface
acceleration constraint that is based on the degree strength given by the
coefficient covariance.
Parameters
----------
lmax : int, optional
The maximum spherical harmonic degree to return.
Reference
---------
Konopliv, A.S., Park, R.S., Ermakov, A.I. (2020). The Mercury gravity
field, orientation, Love number, and ephemeris from the MESSENGER
radiometric tracking data, Icarus, 335, 253-260,
doi:10.1016/j.icarus.2019.07.020.
'''
fname = _retrieve(
url="https://pds-geosciences.wustl.edu/messenger/mess-h-rss_mla-5-sdp-v1/messrs_1001/data/shadr/jgmess_160a_accel_sha.tab", # noqa: E501
known_hash="sha256:a0f99553fcea3d7d0c1395c89d8516f4e53e9e39893a2b82541ca1520b291423", # noqa: E501
downloader=_HTTPDownloader(progressbar=True),
path=_os_cache('pyshtools'),
)
return _SHGravCoeffs.from_file(fname, lmax=lmax, header_units='km',
errors=True, omega=_omega.value,
name='JGMESS160A_ACCEL', encoding='utf-8')
def JGMESS160A_TOPOSIG(lmax=160):
'''
JGMESS160A_TOPOSIG is a JPL 160 degree and order spherical harmonic model
of the gravitational potential of Mercury. This model applies a constraint
similar to the Kaula constraint except that the uncertainty is given by the
corresponding magnitude of the gravity derived from topography coefficient.
Parameters
----------
lmax : int, optional
The maximum spherical harmonic degree to return.
Reference
---------
Konopliv, A.S., Park, R.S., Ermakov, A.I. (2020). The Mercury gravity
field, orientation, Love number, and ephemeris from the MESSENGER
radiometric tracking data, Icarus, 335, 253-260,
doi:10.1016/j.icarus.2019.07.020.
'''
fname = _retrieve(
url="https://pds-geosciences.wustl.edu/messenger/mess-h-rss_mla-5-sdp-v1/messrs_1001/data/shadr/jgmess_160a_toposig_sha.tab", # noqa: E501
known_hash="sha256:ad6d77e55968b9ddaea9cde03cb00ad6b630c81e8509e413e5b5b11213b3d848", # noqa: E501
downloader=_HTTPDownloader(progressbar=True),
path=_os_cache('pyshtools'),
)
return _SHGravCoeffs.from_file(fname, lmax=lmax, header_units='km',
errors=True, omega=_omega.value,
name='JGMESS160A_TOPOSIG', encoding='utf-8')
def GGMES100V08(lmax=100):
'''
GGMES100V08 is a GSFC 100 degree and order spherical harmonic model of
the gravitational potential of Mercury. This model applies a Kaula
constraint to all degrees.
Parameters
----------
lmax : int, optional
The maximum spherical harmonic degree to return.
Reference
---------
Genova, A., Goossens, S., Mazarico, E., Lemoine, F.G., Neumann, G.A.,
Kuang, W., Sabaka, T.J., Hauck, S.A. II, Smith, D.E., Solomon S.C.,
Zuber, M.T. (2019). Geodetic evidence that Mercury has a solid inner
core. Geophysical Research Letters, 46, 3625-3633,
doi:10.1029/2018GL081135.
'''
fname = _retrieve(
url="https://pds-geosciences.wustl.edu/messenger/mess-h-rss_mla-5-sdp-v1/messrs_1001/data/shadr/ggmes_100v08_sha.tab", # noqa: E501
known_hash="sha256:f81b33663ced0c6e05c775aa2d8c6c8eb99c41a20d4063d240fed536e45058fd", # noqa: E501
downloader=_HTTPDownloader(progressbar=True),
path=_os_cache('pyshtools'),
)
return _SHGravCoeffs.from_file(fname, lmax=lmax, header_units='km',
errors=True, omega=_omega.value,
name='GGMES100V08', encoding='utf-8')
__all__ = ['GTMES150', 'JGMESS160A', 'JGMESS160A_ACCEL', 'JGMESS160A_TOPOSIG',
'GGMES100V08']