GRACE ミッションで NASA が作成したデータはすべて、一般公開され、自由に利用できます。GRCTellus データを使用する場合は、「GRACE land は https://grace.jpl.nasa.gov で入手できます。NASA MEaSUREs プログラムによってサポートされています。」という謝辞を追加し、提供された引用文献を引用してください。
引用
引用:
D.P. Chambers. 2012. GRACE MONTHLY OCEAN MASS GRIDS NETCDF
RELEASE 6.0。バージョン 4.0。PO.DAAC、米国、カリフォルニア州。Dataset accessed
[YYYY-MM-DD] at https://doi.org/10.5067/TEOCN-3AC64.
Chambers, D.P.、J.A. Bonin: Evaluation of Release 05 time-variable gravity coefficients over the ocean（海洋上のリリース 05 の時間変動重力係数の評価）。Ocean Science 8、859 ～ 868、2012 年。
https://www.ocean-sci.net/8/859/2012。
Chambers D.P. および J. K. Willis: A Global Evaluation of Ocean Bottom Pressure from GRACE, OMCT, and Steric-Corrected Altimetry（GRACE、OMCT、ステリック補正された高度計による海底水圧のグローバル評価）。J.
of Oceanic and Atmosph. Technology, vol 27, pp 1395-1402.
doi:10.1175/2010JTECHO738.1,
2010.
[null,null,[],[[["\u003cp\u003eThe GRACE Tellus Monthly Mass Grids Ocean dataset provides monthly gravitational anomalies relative to a 2004-2010 time-mean baseline, represented as "Equivalent Water Thickness" in centimeters.\u003c/p\u003e\n"],["\u003cp\u003eData is calculated by three centers (CSR, GFZ, JPL) and users are recommended to use the mean of all three for most applications.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is optimized for examining regional ocean bottom pressure, but it is not intended for determining global mean ocean mass through spatial averaging.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset covers the period from April 4, 2002, to October 25, 2017, with a spatial resolution of 111320 meters.\u003c/p\u003e\n"],["\u003cp\u003eNASA makes this GRACE mission data freely available for public use with proper acknowledgment and citation as outlined in the provided Terms of Use.\u003c/p\u003e\n"]]],[],null,["# GRACE Monthly Mass Grids Release 06 Version 04 - Ocean\n\nDataset Availability\n: 2002-04-04T00:00:00Z--2017-10-25T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA Jet Propulsion Laboratory](https://grace.jpl.nasa.gov/data/get-data/monthly-mass-grids-ocean/)\n\nTags\n:\n[crs](/earth-engine/datasets/tags/crs) [gfz](/earth-engine/datasets/tags/gfz) [grace](/earth-engine/datasets/tags/grace) [gravity](/earth-engine/datasets/tags/gravity) [jpl](/earth-engine/datasets/tags/jpl) [mass](/earth-engine/datasets/tags/mass) [nasa](/earth-engine/datasets/tags/nasa) [ocean](/earth-engine/datasets/tags/ocean) [oceans](/earth-engine/datasets/tags/oceans) [tellus](/earth-engine/datasets/tags/tellus) [water](/earth-engine/datasets/tags/water) \n\n#### Description\n\nGRACE Tellus Monthly Mass Grids provides monthly\ngravitational anomalies relative to a 2004-2010 time-mean baseline.\nThe data contained in this dataset are units of \"Equivalent Water Thickness\"\nwhich represent the deviations of mass in terms of vertical extent\nof water in centimeters. See the provider's [Monthly Mass\nGrids Overview](https://grace.jpl.nasa.gov/data/monthly-mass-grids/)\nfor more details.\n\nThe GRACE Tellus (GRCTellus) Monthly Mass Grids Ocean dataset is produced\nby three centers: CSR (U. Texas / Center for Space Research),\nGFZ (GeoForschungsZentrum Potsdam), and JPL\n(NASA Jet Propulsion Laboratory). Each center is a part\nof the GRACE Ground System and generates Level-2 data\n(spherical harmonic fields) used in this dataset.\nThe output includes spherical harmonic coefficients\nof the gravity field and of the dealiasing fields used to compute them.\nSince each center independently produces the coefficients, the results\nmay be slightly different. It is recommended for most users to\nuse the mean of all three datasets. See the provider's [choosing a\nsolution](https://grace.jpl.nasa.gov/data/choosing-a-solution/) page\nfor more details.\n\n**Note**\n\n- Land leakage correction: Ocean signals are typically weaker\n than land signals, by factors of 2 and more, on seasonal and\n interannual time scales. To minimize leakage from high land\n signals onto ocean signals, a destriping filter has been applied\n which may cause cause correlations over much larger distances.\n\n- The GRCTellus Ocean datasets are optimized to examine regional\n ocean bottom pressure, but NOT intended to be spatially\n averaged to determine global mean ocean mass.\n\n### Bands\n\n\n**Pixel Size**\n\n111320 meters\n\n**Bands**\n\n| Name | Units | Pixel Size | Description |\n|---------------------|-------|------------|---------------------------------------------------------------------|\n| `lwe_thickness_csr` | cm | meters | Equivalent liquid water thickness in centimeters calculated by CSR. |\n| `lwe_thickness_gfz` | cm | meters | Equivalent liquid water thickness in centimeters calculated by GFZ. |\n| `lwe_thickness_jpl` | cm | meters | Equivalent liquid water thickness in centimeters calculated by JPL. |\n\n### Image Properties\n\n**Image Properties**\n\n| Name | Type | Description |\n|----------------|--------|----------------------------------------------------------------------|\n| CSR_END_TIME | DOUBLE | End date in milliseconds of spherical harmonics solution from CSR. |\n| CSR_START_TIME | DOUBLE | Start date in milliseconds of spherical harmonics solution from CSR. |\n| GFZ_END_TIME | DOUBLE | End date in milliseconds of spherical harmonics solution from GFZ. |\n| GFZ_START_TIME | DOUBLE | Start date in milliseconds of spherical harmonics solution from GFZ. |\n| JPL_END_TIME | DOUBLE | End date in milliseconds of spherical harmonics solution from JPL. |\n| JPL_START_TIME | DOUBLE | Start date in milliseconds of spherical harmonics solution from JPL. |\n\n### Terms of Use\n\n**Terms of Use**\n\nAll NASA-produced data from the GRACE mission is made freely available\nfor the public to use. When using any of the GRCTellus data, please\nadd an acknowledgment: \"GRACE land are available at\n\u003chttps://grace.jpl.nasa.gov\u003e,\nsupported by the NASA MEaSUREs Program.\" and cite with the\ncitations provided.\n\n### Citations\n\nCitations:\n\n- D.P. Chambers. 2012. GRACE MONTHLY OCEAN MASS GRIDS NETCDF\n RELEASE 6.0. Ver. 4.0. PO.DAAC, CA, USA. Dataset accessed\n \\[YYYY-MM-DD\\] at \u003chttps://doi.org/10.5067/TEOCN-3AC64\u003e.\n- Chambers, D.P. and J.A. Bonin: Evaluation of Release 05\n time-variable gravity coefficients over the ocean. Ocean Science 8,\n 859-868, 2012.\n \u003chttps://www.ocean-sci.net/8/859/2012\u003e.\n- Chambers D.P. and J. K. Willis: A Global Evaluation of Ocean Bottom\n Pressure from GRACE, OMCT, and Steric-Corrected Altimetry. J.\n of Oceanic and Atmosph. Technology, vol 27, pp 1395-1402.\n [doi:10.1175/2010JTECHO738.1](https://doi.org/10.1175/2010JTECHO738.1),\n 2010.\n\n### DOIs\n\n- \u003chttps://doi.org/10.1175/2010JTECHO738.1\u003e\n\n### Explore with Earth Engine\n\n| **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.Image('NASA/GRACE/MASS_GRIDS_V04/OCEAN/20020403_20020430');\nvar equivalentWaterThicknessCsr = dataset.select('lwe_thickness_csr');\nvar equivalentWaterThicknessCsrVis = {\n min: -0.0799629208930322,\n max: 0.07938676715178997,\n palette: ['001137', '01abab', 'e7eb05', '620500']\n};\nMap.setCenter(6.746, 46.529, 1);\nMap.addLayer(\n equivalentWaterThicknessCsr, equivalentWaterThicknessCsrVis,\n 'Equivalent Water Thickness CSR');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NASA/NASA_GRACE_MASS_GRIDS_V04_OCEAN) \n[GRACE Monthly Mass Grids Release 06 Version 04 - Ocean](/earth-engine/datasets/catalog/NASA_GRACE_MASS_GRIDS_V04_OCEAN) \nGRACE Tellus Monthly Mass Grids provides monthly gravitational anomalies relative to a 2004-2010 time-mean baseline. The data contained in this dataset are units of \"Equivalent Water Thickness\" which represent the deviations of mass in terms of vertical extent of water in centimeters. See the provider's Monthly Mass Grids Overview for ... \nNASA/GRACE/MASS_GRIDS_V04/OCEAN, crs,gfz,grace,gravity,jpl,mass,nasa,ocean,oceans,tellus,water \n2002-04-04T00:00:00Z/2017-10-25T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.1175/2010JTECHO738.1](https://doi.org/https://grace.jpl.nasa.gov/data/get-data/monthly-mass-grids-ocean/)\n- [https://doi.org/10.1175/2010JTECHO738.1](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NASA_GRACE_MASS_GRIDS_V04_OCEAN)"]]
