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01-GRACE數(shù)據(jù)產(chǎn)品下載

2022-08-19 08:37 作者:我是水怪的哥 0人讀過 | 我要投稿

根據(jù) GRACE解算的時間和方法，數(shù)據(jù)發(fā)布機(jī)構(gòu)提供了四種模型：全球大氣模型對應(yīng)的球諧系數(shù)（GAA）；海洋模型對應(yīng)的球諧系數(shù)（GAB）；全球大氣海洋模型對應(yīng)的球諧系數(shù)（GAC）；海洋范圍大氣海洋模型對應(yīng)的球諧系數(shù)（GAD）即大地水準(zhǔn)面模型的球諧系數(shù)（GSM）。GSM是GRACE原始觀測數(shù)據(jù)中扣除了固體潮、海潮、極潮、非潮汐大氣和高頻海洋信號后產(chǎn)品，反映的是地表及內(nèi)部質(zhì) 量重新分布引起的時變重力信號。

ICGEM - International Centre for Global Earth Models

DescriptionThe International Centre for Global Earth Models (ICGEM) is one of five services coordinated by the International Gravity Field Service (IGFS) of the International Association of Geodesy (IAG). The primary task of the ICGEM is making all global gravity field models of the Earth available to the public. The models can be downloaded on the ICGEM website in a standardised self-explanatory format as spherical harmonic coefficients. ICGEM provides not only the most recent, but also historical models, and provides a Digital Object Identifier (DOI) services for gravitational models since 2015. Gravity field differences, their time variation, and different gravity field model functionals are available via a dedicated gravity function calculation service and visualization tool provided on the ICGEM website. In addition, the web site offers tutorials on spherical harmonics and the underlying theory of the calculation service.Type of DataGlobal gravitational models, static models, temporal models, topography related modelsServicesDOI Service, ICGEM Model Visualisation; ICGEM calculation service; tutorialsContactElmas Sinem Ince,?Sven Rei?landSectionsGlobal Geomonitoring and Gravity Field (1.2)Links

GFZ Homepage:?ICGEM - International Centre for Global Earth Models
Project Homepage:?ICGEM Website
Higher category:?IAG Services,?IGFS
Data access:?via GFZ Data Services/ DOI,?via ICGEM

進(jìn)入官網(wǎng)，我們我們看到幾個模塊。界面左邊是切換不同的功能，包括選擇靜態(tài)重力場、時變重力場、以及3D可視化等等。右邊即為不同機(jī)構(gòu)發(fā)布的各類數(shù)據(jù)

我們可以看到有三大機(jī)構(gòu)發(fā)布的數(shù)據(jù)，主要是CSR、GFZ、JPL，包含下載的數(shù)據(jù)和對應(yīng)的數(shù)據(jù)說明文檔。

這里我們選擇CSR GRACE FO的數(shù)據(jù)，點(diǎn)擊monthly，進(jìn)入以下的界面，數(shù)據(jù)處理包含60階和96階，DDK1-DDK8是指經(jīng)過DDK濾波的數(shù)據(jù)，一般我們選擇未經(jīng)過前期處理的數(shù)據(jù)。此外還可下載GAC和GAD數(shù)據(jù)產(chǎn)品。