Landsat8_OLI & TIRS遥感影像L2全球数据(USGS)

美国陆地卫星8号(Landsat-8 )于2013年2月11日由美国航空航天局(NASA)发射升空。Landsat-8卫星上携带两个传感器，分别是OLI陆地成像仪(Operational Land Imager)和TIRS热红外传感器(Thermal Infrared Sensor)。
Landsat-8在空间分辨率和光谱特性等方面与Landsat 1-7保持了基本一致，卫星一共有11个波段，波段1-7，9-11的空间分辨率为30米，波段8为15米分辨率的全色波段，卫星每16天可以实现一次全球覆盖。
OLI陆地成像仪有9个波段，成像宽幅为185 x 185km。与Landsat-7上的ETM传感器相比，OLI陆地成像仪做了以下调整：1. Band 5的波段范围调整为0.845–0.885 μm，排除了0.825μm处水汽吸收的影响;2. Band 8全色波段范围较窄，从而可以更好区分植被和非植被区域;3. 新增两个波段。Band 1蓝色波段(0.433–0.453 μm)主要应用于海岸带观测，Band 9短波红外波段(1.360–1.390 μm) 应用于云检测。LandSat-8上携带的TIRS热红外传感器主要用于收集地球两个热区地带的热量流失，目标是了解所观测地带水分消耗。　Landsat8遥感影像数据应用范围很广，包括：研究全球变化、农业、林业、地质、资源管理、地理学、制图、水质、海岸研究等领域。

The Landsat-8 satellite was launched by the National Aeronautics and Space Administration (NASA) on February 11, 2013. It carries two sensors: the Operational Land Imager (OLI) and the Thermal Infrared Sensor (TIRS).
In terms of spatial resolution and spectral characteristics, Landsat-8 is basically consistent with Landsat 1-7. The satellite has a total of 11 spectral bands: Bands 1-7 and 9-11 have a spatial resolution of 30 meters, while Band 8 is a panchromatic band with a 15-meter resolution. It can complete a global coverage every 16 days.
The OLI has 9 spectral bands, with an imaging swath of 185 × 185 km. Compared with the ETM sensor on Landsat-7, the OLI has undergone the following adjustments: 1. The wavelength range of Band 5 has been adjusted to 0.845–0.885 μm, eliminating the influence of water vapor absorption at 0.825 μm; 2. The wavelength range of the Band 8 panchromatic band has been narrowed, enabling better distinction between vegetated and non-vegetated areas; 3. Two new bands have been added. Band 1, a blue band (0.433–0.453 μm), is mainly used for coastal zone observation, while Band 9, a shortwave infrared band (1.360–1.390 μm), is applied for cloud detection.
The TIRS aboard Landsat-8 is primarily used to collect heat loss from two thermal zones of the Earth, aiming to understand the water consumption of the observed regions. The remote sensing image data of Landsat-8 has a wide range of applications, including global change research, agriculture, forestry, geology, resource management, geography, cartography, water quality, coastal research and other fields.

搜集汇总

背景与挑战

背景概述

该数据集是Landsat-8卫星的L2级全球遥感影像数据，由美国地质调查局（USGS）提供，时间跨度为2013年至2024年，覆盖全球范围。数据包含11个波段，空间分辨率分别为30米（多光谱和热红外波段）和15米（全色波段），适用于全球变化、农业、林业等研究领域，并通过离线申请方式共享。