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57 results for “spherical harmonics”
Translated spherical harmonic gravitational field models for Phobos and 433 Eros
<p>The dataset contains the spherical harmonic gravitational field models for the Martian moon Phobos and the asteroid 433 Eros, which are translated from the original models derived in the respective coordinate systems.</p> <p>The gravity model files contain the normalized spherical harmonic coefficients in the standard format in the folder "gravity". The files named with the prefix "sphcfs\_" are for: 1. base models tied to the respective shape models of Phobos and Eros; 2. four translated models for the northern and southern halves of Phobos and Eros. The models are derived via boundary-value problems. The translated models are each accompanied by an analytically transformed model for comparison. The corresponding data files are identified with the prefix "tsphcfs\_".</p> <p>The triangulated shape model for Phobos interpolated using the spherical harmonic series by Willner et al. (2014), Planetary and Space Science, vol. 102, pp. 51-59, DOI:10.1016/j.pss.2013.12.006 is given in the ".obj" format. The shape model for Eros by Thomas et al. (2002), Icarus, vol. 155, pp. 18-37, DOI:10.1006/icar.2001.6755 used in the study belongs to the ``NEAR Collected Shape and Gravity Models'' (NEAR-A-5-COLLECTED-MODELS-V1.0) at https://sbn.psi.edu/pds/resource/nearbrowse.html (retrieved in Mar. 2024), and is not included. The dissected shape models are provided for both objects, which are used for model evaluation over the northern and southern halves of the bodies.</p> <p>The parameters of the Brillouin spheres are provided in the folder "sphere".</p> <p>The numerical results in the folder "result" are modeled gravitational potentials alongside the true values around and on the surface of the bodies. The results for the ellipsoidal harmonic models are provided for comparison.</p>
GOCE-only spherical harmonic models of the Earth's gravitational field
<p>Provided are the global GOCE-only spherical harmonic models of the Earth's gravitational field developed by <a href="http://doi.org/10.1007/s10712-015-9344-0">Bucha et al. (2015)</a>.</p> <ul> <li>The key data is the kinematic orbit of the GOCE satellite spanning the period from 01 November 2009 to 11 January 2010 (the R1 period).</li> <li>The <a href="http://doi.org/10.1016/j.asr.2013.11.031">acceleration approach</a> was used to invert the kinematic orbit into the gravity field models.</li> <li>The models were derived by spherical radial basis functions (Shannon SRBF) and subsequently they were transformed into spherical harmonics. The transformation is exact without any approximations.</li> <li>The problematic near-zonal coefficients (polar gap) are stabilized by prior information from our own low-degree GOCE-only models, so that the final models are still GOCE-only.</li> <li>The models are estimated up to relatively high harmonic degrees (75, 100, 130) to mitigate the aliasing, but it is not recommended to use them beyond degree, say, 70 due to the adverse signal-to-noise ratio.</li> <li>The models are provided in the <a href="http://icgem.gfz-potsdam.de/ICGEM-Format-2011.pdf">gfc</a> format as defined by <a href="http://icgem.gfz-potsdam.de">ICGEM</a>.</li> </ul> <p>The models have been published in Bucha, B., Bezdek, A., Sebera, J., Janak, J., 2015. <em>Global and regional gravity field determination from GOCE kinematic orbit by means of spherical radial basis functions</em>. Surveys in Geophysics 36, 773-801, <a href="http://doi.org/10.1007/s10712-015-9344-0">http://doi.org/10.1007/s10712-015-9344-0</a></p>
Means and standard errors of fits for the l=2 spherical harmonic expansion coefficients of the radio brightness distribution on the sky using Parker Solar Probe/FIELDS/RFS data
Open the record for dataset details and reuse information.
Spherical harmonic model of the Moon's gravitational potential: SGM100i
<p>SGM100i is a spherical harmonic model of the Moon's gravitational potential that used data from the mission Kaguya. The data in the file SGM100i.sh.gz are identical to those in the file <a href="https://data.darts.isas.jaxa.jp/pub/pds3/sln-l-rise-5-grav-coef-v1.0/data/SGM100i_coef.txt">SGM100i_coef.txt</a> with the exception that they have been reformatted in a way that facilitates their reading by the python package pyshtools.</p>
Spherical harmonic model of the magnetic field of Mars from Langlais et al. (2019)
<p><strong>Langlais2019.sh.gz</strong> is a gzipped file of the magnetic potential coefficients of Mars as published by Langlais et al. (2019). This is the same as the file jgre21147-sup-0003-Table_SI-S01.txt in the supporting information of this manuscript.</p>
GRACE-FO Level-2 Monthly Geopotential Spherical Harmonics JPL Release 6.3 (RL06.3)
FOR EXPERT USE ONLY. This dataset contains estimates of the total month-by-month geopotential of the Earth, derived from the Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) mission measurements, produced by the NASA Jet Propulsion Laboratory (JPL). The data are provided as spherical harmonic coefficients, averaged over approximately a month, and available from 2018 onward. These coefficients are derived from the Microwave Instrument (MWI) measured intersatellite range changes between the twin spacecraft of the GRACE-FO (Gravity Recovery and Climate Experiment Follow-On) mission. The GRACE-FO mission, a joint partnership between NASA and the German Research Centre for Geosciences (GFZ), launched on 22 May 2018. It uses twin satellites to accurately map variations in the Earth's gravity field and surface mass distribution. It is designed as a successor to the Gravity Recovery and Climate Experiment (GRACE) mission. <br><br>This GRACE-FO RL06.3 data is an updated version of the GRACE-FO RL06.1 Level-2 data products. RL06.3 differs from RL06.1 only in the Level-1B accelerometer transplant data that is used for the GF2 satellite: Level-2 RL06.3 uses ACH1B RL04 that is contained within the ACX2 Level-1 bundle, which replaces ACH1B RL04 contained within the ACX Level-1 bundle that was used for Level-2 RL06.1 (note: ACX2-L1B is only applicable for 01/2023 onwards in wide-pointing operational mode; from 6/2018 through 12/2022, RL06.1 and RL06.3 GRACE-FO data are identical and based on ACX; ACX2 is not available for 03/2023-06/2023 as the satellites were not in wide-pointing mode during that period). All GRACE-FO RL06.3 Level-2 products are fully compatible with the GRACE RL06 level-2 fields. Refer to the mission page for more information.
GRACE-FO Level-2 Monthly Geopotential Spherical Harmonics GFZ Release 6.3 (RL06.3)
FOR EXPERT USE ONLY. This dataset contains estimates of the total month-by-month geopotential of the Earth, derived from the Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) mission measurements, produced by the German Research Centre for Geosciences (GFZ). The data are provided as spherical harmonic coefficients, averaged over approximately a month. These coefficients are derived from the Microwave Instrument (MWI) measured intersatellite range changes between the twin spacecraft of the GRACE-FO mission. Refer to the mission page for more information. <br><br>This GRACE-FO RL06.3 data is an updated version of the GRACE-FO RL06.1 Level-2 data products. RL06.3 differs from RL06.1 only in the Level-1B accelerometer transplant data that is used for the GF2 satellite: Level-2 RL06.3 uses ACH1B RL04 that is contained within the ACX2 Level-1 bundle, which replaces ACH1B RL04 contained within the ACX Level-1 bundle that was used for Level-2 RL06.1 (note: ACX2-L1B is only applicable for 01/2023 onwards in wide-deadband operational mode; from 6/2018 through 12/2022, RL06.1 and RL06.3 GRACE-FO data are identical). All GRACE-FO RL06.3 Level-2 products are fully compatible with the GRACE RL06 level-2 fields. Refer to the mission page for more information.
GRACE-FO Level-2 Monthly Geopotential Spherical Harmonics CSR Release 06.3 (RL06.3)
FOR EXPERT USE ONLY. This dataset contains estimates of the total month-by-month geopotential of the Earth, derived from the Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) mission measurements, produced by the University of Texas (at Austin) Center for Space Research (CSR). The data are provided as spherical harmonic coefficients, averaged over approximately a month, and available from 2018 onward. These coefficients are derived from the Microwave Instrument (MWI) measured intersatellite range changes between the twin spacecraft of the GRACE-FO (Gravity Recovery and Climate Experiment Follow-On) mission. The GRACE-FO mission, a joint partnership between NASA and the German Research Centre for Geosciences (GFZ), launched on 22 May 2018. It uses twin satellites to accurately map variations in the Earth's gravity field and surface mass distribution. It is designed as a successor to the Gravity Recovery and Climate Experiment (GRACE) mission. <br><br>This GRACE-FO RL06.3 data is an updated version of the GRACE-FO RL06.1 Level-2 data products. RL06.3 differs from RL06.1 only in the Level-1B accelerometer transplant data that is used for the GF2 satellite: Level-2 RL06.3 uses ACH1B RL04 that is contained within the ACX2 Level-1 bundle, which replaces ACH1B RL04 contained within the ACX Level-1 bundle that was used for Level-2 RL06.1 (note: ACX2-L1B is only applicable for 01/2023 onwards in wide-pointing operational mode; from 6/2018 through 12/2022, RL06.1 and RL06.3 GRACE-FO data are identical and based on ACX; ACX2 is not available for 03/2023-06/2023 as the satellites were not in wide-pointing mode during that period). All GRACE-FO RL06.3 Level-2 products are fully compatible with the GRACE RL06 level-2 fields. Refer to the mission page for more information.
Models of the gravity field of Jupiter using Slepian and Spherical Harmonic functions
<p>This dataset contains gravitational models using Slepian and spherical harmonic functions for Jupiter, derived from the high-precision Doppler measurements collected by NASA's Juno mission to Jupiter from periapsis 1 to 17. This dataset is intended to be paired with the following article submitted to the Journal of Geophysical Research-Planets:</p> <p>Marzia Parisi, Eli Galanti, William M. Folkner, Yohai Kaspi and Dustin R. Buccino. "Resolving the latitudinal short-scale gravity field of Jupiter using Slepian functions", Journal of Geophysical Research, 2020 (submitted Feb 2020).<br> <br> This dataset of gravity field models was produced in part at the Jet Propulsion Laboratory by the Juno Gravity Instrument Team and Interiors Working Group.</p>
MESSENGER gravity and topography spherical harmonics model bundle
The bundle contains derived models of Mercury gravity and topography from radio science tracking and from the MLA instrument on MESSENGER. There are three product types: the Occultation Summary (OCC), the Spherical Harmonics ASCII Data Records (SHADR), and the Spherical Harmonics Binary Data Records (SHBDR).
MOLA SPHERICAL HARMONICS TOPOGRAPHY MODEL
The Mars Global Surveyor spacecraft included a laser altimeter instrument. The primary objective of the Mars Orbiter Laser Altimeter (MOLA) is to determine globally the topography of Mars at a level suitable for addressing problems in geology and geophysics.
MGN V RDRS SPHERICAL HARMONIC AND TOPOGRAPHY MAP DATA V1.0
This data set contains the Magellan Topography Model of Venus and was produced by a spherical harmonic analysis of the most complete set of Magellan altimetry data, augmented by Pioneer Venus and Venera data. A detailed report on this harmonic analysis and its scientific implications is in [RAPPAPORT&PLAUT1994].
MGN V RSS SPHERICAL HARMONIC AND GRAVITY MAP DATA V1.0
The gravitational signature of Venus was determined from velocity perturbations of the Pioneer Venus Orbiter (PVO) and the Magellan spacecraft as measured from the Doppler shift of the S-band and X-band radio tracking signal. The spacecraft were tracked by NASA's Deep Space Network (DSN) at Goldstone, California, Canberra, Australia, and Madrid, Spain. The tracking data were used to determine the spacecraft orbits about Venus, as well as the Venusian gravity field. A detailed description of how the spacecraft orbits were computed and an assessment of their quality can be found in [KONOPLIV&SJOGREN1996]. For information on Magellan gravity investigations see papers in [ICARUSMGN1994].
Shapefiles for Spherical-harmonic distribution of coronae in relation to volcanic features on Venus
<p>GIS shapefiles of mapped lava flows with calculations on flow divergence from downhill direction. </p>
MGN V RSS SPHERICAL HARMONIC AND GRAVITY MAP DATA V1.0
The gravitational signature of Venus was determined from velocity perturbations of the Pioneer Venus Orbiter (PVO) and the Magellan spacecraft as measured from the Doppler shift of the S-band and X-band radio tracking signal. The spacecraft were tracked by NASA's Deep Space Network (DSN) at Goldstone, California, Canberra, Australia, and Madrid, Spain. The tracking data were used to determine the spacecraft orbits about Venus, as well as the Venusian gravity field. A detailed description of how the spacecraft orbits were computed and an assessment of their quality can be found in [KONOPLIV&SJOGREN1996]. For information on Magellan gravity investigations see papers in [ICARUSMGN1994].
MGN V RDRS SPHERICAL HARMONIC AND TOPOGRAPHY MAP DATA V1.0
This data set contains the Magellan Topography Model of Venus and was produced by a spherical harmonic analysis of the most complete set of Magellan altimetry data, augmented by Pioneer Venus and Venera data. A detailed report on this harmonic analysis and its scientific implications is in [RAPPAPORT&PLAUT1994].
MOLA SPHERICAL HARMONICS TOPOGRAPHY MODEL
The Mars Global Surveyor spacecraft included a laser altimeter instrument. The primary objective of the Mars Orbiter Laser Altimeter (MOLA) is to determine globally the topography of Mars at a level suitable for addressing problems in geology and geophysics.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
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