图像中的每一个像素都和海拔、维度、经度以及与观测者的距离等信息相关联。

Each pixel of the image is associated with information such as altitude, latitude, longitude and distance from the observer.

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地理经度：你的观测地点的地理经度。

Longitude: The geographical longitude of your observing site.

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摘要： 在天文经度测量中，由观测员及其所用仪器引起的误差称为人仪差，在一、二等天文测量中必须加入此项改正。

The error derived from the observer and his instruments in surveying astronomical longitude is called the person and instrumental equation, which must be corrected in the first and second degrees.

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