MODIS True Color - Terra Surface Reflectance

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. NASA Global Imagery Browse Services (GIBS) This image layer provides access to a subset of the NASA Global Imagery Browse Services (GIBS), which are a set of standard services to deliver global, full-resolution satellite imagery. The GIBS goal is to 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. 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. 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. Note on Time: 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 configure time settings. The results can be saved in a web map to use later or share with others.MODIS（中分辨率成像光谱仪）旗下的该系列产品为目前唯一可获取的每日全球合成影像产品，适用于全球及区域尺度的科研与应用场景。该真彩色波段组合（波段1、4、3 | 红、绿、蓝）可精准还原人眼观测到的地球地表真实样貌，其成像效果自然逼真，可广泛应用于地表、海洋与大气相关的分析研究。该系列共计四款真彩色产品：针对Aqua与Terra两颗卫星，分别配套提供250米校正反射率产品与500米地表反射率产品。尽管其分辨率低于多数同类卫星，但该产品可实现每日全球影像采集，并以近实时的方式对外分发。相比之下，陆地卫星（Landsat）完成一次全球影像合成需要耗时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。NASA全球影像浏览服务（Global Imagery Browse Services, GIBS）：该影像图层可访问GIBS的子集服务，后者是一套用于交付全球全分辨率卫星影像的标准化服务体系。GIBS的核心目标是为广大用户提供NASA地球影像的交互式浏览与探索功能。由Esri（环境系统研究所）托管的该影像图层及其他GIBS影像服务，旨在为ArcGIS用户提供便捷获取这些优质实用卫星影像的途径。该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类研究。GIBS可在观测后近实时（通常不超过3.5小时）生成并分发多款全分辨率全球影像产品，这些产品的数据源自NASA地球观测系统卫星数据，由LANCE数据提供商及其他相关来源提供支持。其数据源包括搭载于Terra与Aqua卫星的MODIS仪器、搭载于Aqua卫星的AIRS（大气红外探测器）仪器，以及搭载于Aura卫星的OMI（臭氧监测仪器）仪器。多款MODIS全球产品均可通过该Esri托管服务获取。由Esri托管的该影像图层可直接访问一款GIBS影像产品。Esri服务器本身并不存储任何此类数据。每当接收到数据请求时，系统会从GIBS调取多张影像瓦片，随后对其进行处理并拼接为符合响应要求的完整影像。该处理流程针对每一项请求均实时动态完成，这一机制可确保GIBS数据的任何更新都会在Esri镶嵌服务中立即同步生效。时间设置说明：支撑该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。若需查看随时间变化的影像，可通过更新图层属性启用时间动画并配置时间参数。最终结果可保存至Web地图中，以供后续使用或与他人共享。