黑河生态水文遥感试验：资源三号（ZY-3）遥感数据集

资源三号（ZY-3）卫星是中国第一颗自主的民用高分辨率立体测绘卫星，通过立体观测，可以测制1:5万比例尺地形图，为国土资源、农业、林业等领域提供服务。该星于2012年1月9日发射升空。卫星采用经适应性改进的资源二号卫星平台，配置四台相机：（1）1台地面分辨率优于2.5米的正视全色TDI CCD相机；（2）2台地面分辨率优于4米的前视、后视全色TDI CCD相机；（3）1台地面分辨率优于10米的正视多光谱相机。卫星具有测摆功能，可对地球南北纬84度以内的地区实现无缝影像覆盖，每59天实现对我国领土和全球范围的一次影像覆盖，在特殊情况下，能够在5天之内对同一地点进行重访拍摄。
2012年共获取ZY-3影像44景。覆盖范围为整个黑河流域，获取时间（北京时间，每天有多景数据）为：2012-08-25, 2012-09-03, 2012-09-08, 2012-09-13, 2012-09-18, 2012-09-23, 2012-09-28, 2012-10-03, 2012-10-13, 2012-10-18, 2012-10-22, 2012-11-01, 2012-11-11, 2012-11-21。
获取的数据为多光谱模式，分辨率1 m，产品级别为L1。
黑河流域生态-水文过程综合遥感观测联合试验ZY-3遥感数据集通过购买获取。

Ziyuan-3 (ZY-3) satellite is China's first domestically developed civilian high-resolution stereoscopic mapping satellite. Through stereoscopic observation, it can produce 1:50,000 scale topographic maps, providing services for fields such as land resources, agriculture, and forestry. The satellite was launched on January 9, 2012. It adopts an adaptively improved Ziyuan-2 satellite platform and is equipped with four cameras: (1) 1 nadir panchromatic TDI CCD camera with a ground resolution better than 2.5 meters; (2) 2 forward-looking and backward-looking panchromatic TDI CCD cameras with a ground resolution better than 4 meters each; (3) 1 nadir multispectral camera with a ground resolution better than 10 meters. The satellite has slew capability, enabling seamless image coverage of regions within 84° north and south latitude. It can complete one full image coverage of China's territory and the entire globe every 59 days, and in special cases, it can revisit and image the same location within 5 days.

In 2012, a total of 44 ZY-3 image scenes were acquired, covering the entire Heihe River Basin. The acquisition times (Beijing Time, with multiple scenes per day) are: 2012-08-25, 2012-09-03, 2012-09-08, 2012-09-13, 2012-09-18, 2012-09-23, 2012-09-28, 2012-10-03, 2012-10-13, 2012-10-18, 2012-10-22, 2012-11-01, 2012-11-11, 2012-11-21.

The acquired data is in multispectral mode, with a resolution of 1 meter, and the product level is L1.

This ZY-3 remote sensing dataset for the Comprehensive Remote Sensing Observation Joint Experiment on Eco-Hydrological Processes in the Heihe River Basin is obtained through purchase.