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Data Release 9 (DR9) is the ninth public data release of the Legacy Surveys. It is the seventh public data release of images and catalogs from DECaLS (DR8 comprised the sixth release of data from DECaLS) and the fourth release of data from BASS and MzLS (DR8 comprised the third release of data from BASS and MzLS).

2024年10月24日 · 国家天文科学数据中心已经镜像了DR9的全套数据，其中对星表数据提供了在线检索功能，检索地址为：https://nadc.china-vo.org/data/data/legacysurvey9tractor/f。 如在数据使用中有任何问题或建议，欢迎联系我们。

2025年1月18日 · We calculated the anisotropic two-point correlation function in a modified binning scheme to detect the BAOs in DR9 data. We then used template fits based on simulations to measure the BAO scale in the imaging data.

DR10, DR9, and DR8 databases are respectively named ls_dr10, ls_dr9, and ls_dr8. Select a database in order to see the tables it contains as well as their descriptions.

市场上把公头的 接插件 叫做DRXX，母头的叫DBXX，比如我们电脑上的串口，在市场上叫做DR9，不是DB9，很多人都误叫做DB9，实际上的DB9是两个把两个DR9互相连接在一起的接口。 九孔的DB9母头接口与九孔的DR9母头接口有什么区别吗？ 两者可以通用吗？ 电脑 的 串口 都是 9针式 的你这个情况最好用 带串口的机器再不行 就用 USB 转串口 了请看 武汉鸿伟光电E810 USB转DB9 RS-232接口记住，一定要.

Twenty files of random points in bricks that do not contain an observation in DR9 (that are "outside" of the DR9 footprint). The columns in this file are simplified compared to the other random catalogs as most of the entries in the additional columns would be zeros.

下载DR-9P中文资料、引脚图、Datasheet数据手册，有D-Sub/VGA连接器详细引脚图及功能的应用电路图电压和使用方法及教程。

2011年10月24日 · Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope LAMOST) is a National Major Scientific Project built by the Chinese Academy of Sciences. Funding for the project has been provided by …

DR9数据集获得于2011年10月-2021年6月，包含了常规低分辨率光谱数据和中分辨率光谱数据两部分。 为满足LAMOST用户的科学需求，LAMOST数据处理部对DR9数据集进行了更新处理，与DR9 v1.0相比，DR9 v1.1做了如下更新： 数据说明文档的更新和细化等。 图1 左图为LAMOST先导巡天和低分辨率巡天前九年天区覆盖图，右图为LAMOST前三年中分辨率光谱巡天天区覆盖图。 （绘制：袁海龙） DR9 v1.1 数据集共包括5533个低分辨率观测天区，1529个中分辨率观测天 …