MODIS True Color - Terra Corrected Reflectance

<div><span>This series of products from MODIS represents the only daily global composites available and is suitable for use at global and regional levels. This True Color band composition (Bands 1 4 3 | Red, Green, Blue) most accurately shows how we see the earth’s surface with our own eyes. It is a natural looking image that is useful for land surface, oceanic and atmospheric analysis. There are four True Color products in total. For each satellite (Aqua and Terra) there is a 250 meter corrected reflectance product and a 500 meter surface reflectance product. Although the resolution is coarser than other satellites, this allows for a global collection of imagery on a daily basis, which is made available in near real-time. In contrast, Landsat needs 16 days to collect a global composite. Besides the maximum resolution difference, the surface and corrected reflectance products also differ in the algorithm used for atmospheric correction.</span></div><div>&nbsp;</div><div>&nbsp;</div><div><span style='font-size:medium;'>NASA Global Imagery Browse Services (GIBS)</span></div><div>&nbsp;</div><div>This image layer provides access to a subset of the NASA&nbsp;<a target='_blank' href='https://www.earthdata.nasa.gov/engage/open-data-services-software/earthdata-developer-portal/gibs-api' rel='nofollow ugc noopener noreferrer'>Global Imagery Browse Services (GIBS)</a>, which are a set of standard services to deliver global, full-resolution satellite imagery. The GIBS goal is to&nbsp;enable interactive exploration of NASA's Earth imagery for a broad range of users. The purpose of this image layer, and the other GIBS image services hosted by Esri, is to enable convenient access to this beautiful and useful satellite imagery for users of ArcGIS. The source data used by this image layer is a finished image; it is not recommended for quantitative analysis.</div><div>&nbsp;</div><div>Several full resolution, global imagery products are built and served by GIBS in near real-time (usually within 3.5 hours of observation). These products are built from NASA Earth Observing System satellites data courtesy of LANCE data providers and other sources. The MODIS instrument aboard Terra and Aqua satellites, the AIRS instrument aboard Aqua, and the OMI instrument aboard Aura are used as sources. Several of the MODIS global products are made available on this Esri hosted service.</div><div>&nbsp;</div><div>This image layer hosted by Esri provides direct access to one of the GIBS image products. The Esri servers do not store any of this data itself. Instead, for each received data request, multiple image tiles are retrieved from GIBS, which are then processed and assembled into the proper image for the response. This processing takes place on-the-fly, for each and every request. This ensures that any update to the GIBS data is immediately available in the Esri mosaic service.</div><div>&nbsp;</div><div><strong>Note on Time</strong><span>: The image service supporting this layer is time enabled, but time has been disabled on this image layer so that the most recent imagery displays by default. If you would like to view imagery over time, you can update the layer properties to enable time animation and&nbsp;</span><a target='_blank' href='https://doc.arcgis.com/en/arcgis-online/create-maps/configure-time-mv.htm' rel='nofollow ugc noopener noreferrer'>configure time settings</a><span>. The results can be saved in a web map to use later or share with others.</span></div><div><p>&nbsp;</p></div>

<div><span>此系列MODIS（中分辨率成像光谱仪，Moderate Resolution Imaging Spectroradiometer）产品为目前唯一可获取的每日全球合成数据集，适用于全球及区域尺度的研究应用。该真彩色波段组合（波段1、4、3 | 红、绿、蓝）能够最精准地还原人眼所见的地球表面样貌，成像效果自然逼真，可广泛用于地表、海洋及大气相关分析。本系列总计包含4款真彩色产品：针对Aqua与Terra两颗卫星，分别对应250米校正反射率产品与500米地表反射率产品。尽管其分辨率低于其他卫星，但该数据集可实现每日全球影像采集，并以近实时的方式对外提供服务；相比之下，陆地卫星（Landsat）完成一次全球影像合成需要16天。除最高分辨率存在差异外，地表反射率产品与校正反射率产品所采用的大气校正算法也各不相同。</span></div><div><br /></div><div><font size='3'>NASA全球影像浏览服务（GIBS）</font><br /></div><div><br /></div><div>本影像图层可访问<a href="https://earthdata.nasa.gov/collaborate/open-data-services-and-software/api/gibs-api" target="_blank">NASA全球影像浏览服务（GIBS）</a>的子集，该服务是一套用于交付全球全分辨率卫星影像的标准服务体系。GIBS的目标是为广大用户提供NASA地球影像的交互式浏览功能。本影像图层与Esri托管的其他GIBS影像服务的初衷，均是为ArcGIS用户提供便捷访问这类优质实用卫星影像的途径。本影像图层所使用的源数据为成品影像，不建议用于定量分析。</div><div><br /></div><div>GIBS可近实时（通常在观测后3.5小时内）生成并交付多款全分辨率全球影像产品。这些产品的数据源自LANCE数据提供商及其他渠道的NASA地球观测系统卫星数据，所用数据源包括搭载于Terra与Aqua卫星的MODIS传感器、搭载于Aqua卫星的大气红外探测器（Atmospheric Infrared Sounder, AIRS），以及搭载于Aura卫星的臭氧监测仪器（Ozone Monitoring Instrument, OMI）。本Esri托管服务中已提供多款MODIS全球产品。<br /></div><div><br /></div><div>本由Esri托管的影像图层可直接访问一款GIBS影像产品。Esri服务器本身不存储任何此类数据，而是在接收到数据请求时，从GIBS调取多幅影像瓦片，经处理后拼接为符合响应要求的完整影像。该处理过程针对每一条请求实时完成，可确保GIBS数据的任何更新都会立即同步至Esri镶嵌服务中。<br /></div><div><br /></div><div><b>时间设置说明</b><span>: 支持本图层的影像服务支持时间维度功能，但本影像图层已禁用时间功能，默认显示最新影像。若需查看不同时段的影像，可修改图层属性以启用时间动画并<a href="https://resources.arcgis.com/en/help/arcgisonline/index.html#//010q0000008w000000" target="_blank">配置时间设置</a>。配置结果可保存至Web地图中，供后续使用或分享给他人。</span><br /></div><div><p><span></span></p></div>