pyorbital.get_position函数输出位置向量在ECEF或ECI框架中？
此功能的文档令人惊讶地没有提及坐标框架。有人知道它是哪个吗？谢谢！ https：///pyorbital.readorbital.readthedocs.io oreadthedocs.io/en/latest/latest/petest/latest/# pyorbital.orbital.orbital.get_position
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我快速查看源代码， https：https：// github。 com/pytroll/pyorbital/blob/main/pyorbital/orbital.py 。他们只是使用SGP4的输出，因此坐标框架将成为日期的Teme。看来他们有自己的SGP4实施。我无法看一眼是否包括Vallado ET的各种调整。 al。实施以使开源版本更加匹配“官方”版本（请参见 https://celestrak.org/publications/aiaa/2006-6753/aiaa-2006-6753.pdf ）。
I took a quick peek at the source code at https://github.com/pytroll/pyorbital/blob/main/pyorbital/orbital.py. They are just using the output from SGP4, so the coordinate frame is going to be TEME of Date. It also looks like they have their own implementation of SGP4. I can't tell at a glance whether it includes the various tweaks that Vallado et. al. had implemented to get the open source version to more closely match the "official" version (see https://celestrak.org/publications/AIAA/2006-6753/AIAA-2006-6753.pdf).