Declass 1 (1996) = Corona, Lanyard, & Argon Missions - KH1 thru KH6: 1960 - 1972

On February 24, 1995, President Clinton signed an Executive Order, directing the declassification of intelligence imagery acquired by the first generation of United States photo-reconnaissance satellites, including the systems code-named CORONA, ARGON, and LANYARD. More than 860,000 images of Earth's surface, collected between 1960 and 1972, were declassified with the issuance of this Executive Order. The National Archives and Records Administration (NARA) was given the responsibility for the original film and provide access to a duplicate copy for public viewing of the film. The USGS was also provided a dupe copy to support science products. Both NARA and the USGS provide access and product support for Declass-1 collection.

Online requests for these data can be placed via the EarthExplorer interactive query system. EarthExplorer contains metadata and online samples of Earth science data. With EarthExplorer, you may review metadata, determine product availability, and place online requests for products.

More than 40 percent of the imagery contains significant cloud cover. The use of browse imagery gives the user the opportunity to review a reduced spatial resolution image to determine whether or not the area of interest is covered and is or is not obscured by clouds.

1995年2月24日，克林顿总统签署行政命令，指令解密美国第一代照相侦察卫星获取的情报影像，包括代号为CORONA、ARGON及LANYARD的侦察系统。1960年至1972年间采集的超过86万张地球表面影像随该行政命令的发布完成解密。

美国国家档案与文件管理局（National Archives and Records Administration, NARA）获委托保管原始胶片，并提供副本供公众查阅；美国地质调查局（United States Geological Survey, USGS）亦获赠副本以支撑科学产品研发。美国国家档案与文件管理局与美国地质调查局均为Declass-1数据集提供访问与产品支持服务。

此类数据的在线申请可通过EarthExplorer交互式查询系统提交。EarthExplorer平台收录地球科学数据的元数据与在线样例，用户可借此查阅元数据、确认产品可用性，并提交在线产品申请。

超过40%的影像存在显著云覆盖。浏览影像（browse imagery）功能可让用户查看空间分辨率降低后的影像，以此判断感兴趣区域是否被纳入数据集，以及是否被云层遮挡。