p049r021_1x19740612-陆地卫星遥感影像

本数据集为MSS，Landsat1卫星的数据集，p049r021_1x19740612。轨道号：049；行号：021；数据时间：1974-06-12。<br>陆地卫星（Landsat）是美国地球资源卫星系列。是美国用于探测地球资源与环境的系列地球观测卫星系统，曾称作地球资源技术卫星（ERTS）。<br>自1972年7月23日发射陆地卫星1号以来，到1984年3月1日已发射到陆地卫星5号。陆地卫星6发射失败。陆地卫星7（Landsat－7）于1999年4月15日发射升空，至今依然担负着重要任务。<br>在数据产品方面，Landsat－7与Landsat－5的最主要差别有：增加了分辨率为15米的全色波段（PAN波段）；波段6的数据分低增益和高增益数据，分辨率从120米提高到60米。

This dataset is MSS data from the Landsat 1 satellite, with the identifier p049r021_1x19740612. Orbit number: 049; Row number: 021; Data acquisition date: 1974-06-12.

Landsat, previously named the Earth Resources Technology Satellite (ERTS), is a series of Earth resources satellites developed by the United States. It is a suite of Earth observation satellite systems used by the US to detect Earth's resources and environment.

Since the launch of Landsat 1 on July 23, 1972, up to March 1, 1984, Landsat 5 had been successfully launched. The launch of Landsat 6 ended in failure. Landsat 7 (Landsat-7) was launched on April 15, 1999, and has continued to undertake important satellite missions to this day.

In terms of data products, the most significant differences between Landsat-7 and Landsat-5 are: a 15-meter-resolution panchromatic band (PAN band) was added; the data of Band 6 is categorized into low-gain and high-gain datasets, with its resolution increased from 120 meters to 60 meters.