2021-2022年Landsat9典型区域优质影像数据集

Landsat-9是美国陆地卫星计划（Landsat）的第九颗卫星，由NASA与美国地质调查局（USGS）合作开发并于2021年9月27日发射成功。Landsat-9的改进实现了OLI-2的更高辐射分辨率（14位量化），允许传感器检测更细微的差异，尤其是在水或茂密森林等较暗区域。凭借更高的辐射分辨率，Landsat-9可以区分给定波长的16, 384种色调。相比之下，Landsat-8提供12位数据和4, 096种色调，而Landsat-7以8位分辨率仅检测到256种色调。除了对OLI-2的改进之外，与Landsat-8热红外传感器（TIRS）相比，TIRS-2显著减少了杂散光，从而改进了大气校正，实现更准确的地表温度测量。Landsat-9将扩展人类衡量全球陆地表面变化的能力，成为监测地球健康状况的国际战略的重要组成部分。

Landsat-9 is the ninth satellite of the U.S. Landsat program, jointly developed by NASA and the U.S. Geological Survey (USGS), and successfully launched on September 27, 2021. The upgrades of Landsat-9 enable the Operational Land Imager-2 (OLI-2) to achieve a higher radiometric resolution (14-bit quantization), allowing the sensor to detect more subtle differences, especially in darker areas such as water or dense forests. With its higher radiometric resolution, Landsat-9 can distinguish 16,384 tonal variations at a given wavelength. In comparison, Landsat-8 provides 12-bit data with 4,096 tonal variations, while Landsat-7 detects only 256 tonal variations with an 8-bit resolution. Apart from the improvements to the OLI-2, compared with the Landsat-8 Thermal Infrared Sensor (TIRS), the TIRS-2 significantly reduces stray light, thereby enhancing atmospheric correction and enabling more accurate land surface temperature measurements. Landsat-9 will expand humanity's capacity to measure global land surface changes, and serve as a critical component of the international strategy for monitoring Earth's health.

搜集汇总

背景与挑战

背景概述

该数据集包含2021-2022年Landsat9卫星拍摄的典型区域优质影像，具有更高的辐射分辨率和改进的热红外传感器，适用于全球陆地表面变化的监测。数据集包含3828个GeoTiff格式文件，总存储容量为342.36 GB。