有许多模型估计轨道参数耗时过长。所有的依赖,而复杂的公式,占其他行星产生的扰动,月亮,和许多其他因素。甚至一些模型考虑相对论效应[这个答案][1]中描述。轨道的解决方案,我经常看到在论文中引用和使用处理气候迫使LA93,计算拉斯卡尔et al .(1993)和本文中描述(岁差的轨道,日晒量+ 10的地球从-20年最高产量研究最高产量研究][2]。然而,更准确的解决方案是可用的现在,更喜欢LA2004和特别是LA2010。下面我将描述如何下载输出数据和编码这些解决方案。LA93的代码(在fortran)和输出的模型是可用的(维齐尔目录)[3],在那里你可以查询模型输出,或者只是进入[这个FTP文件夹][4]和下载的文件代码和长表与模型输出每一千年。如果“三米兰柯维奇因素”你的意思是倾斜,偏心,进动指数(偏心\ * sin(近日点经度)美元)。数据已经准备好这两个文件下载和使用:[CLIVAR0N。ASC(-20年最高产量研究0最高产量研究)][5][CLIVAR0P < br >。ASC(0 + 10最高产量研究最高产量研究)][6]的byte-per-byte描述这些文件中描述(自述)[7]- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -单位标签字节格式解释- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4 - 11 F8.0 1000年t时间从1000年来J2000 13 - 31 D19.12——e偏心33 - 51 D19.12 rad eps倾斜(弧度)53 - 71 D19.12 - - - CP e *罪(经度的近日点移动equinox) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -与代码还可以计算常见的气候代理如隔离在65°N或任何其他纬度。 For LA2004 (-50 Myr to +20 Myr) the same research team implemented a very useful [online calculator][8] that allows to compute insolation quantities derived from the orbital and precessional quantities for any latitude of interest. It outputs the results in tabular form. The calculator interface looks like this so you get an idea of the available options. [![enter image description here][9]][9] The LA2010 solution is described in the paper [La2010: a new orbital solution for the long-term motion of the Earth][10], and goes 250 Myr back in time. You can find similar data files and codes for this solution at the [Astronomical Solutions for Earth Paleoclimates page][11]. To my understanding, LA2010 represent the state-of-the-art solution for orbital parameters and it does include relativistic corrections as well. [1]: //www.hoelymoley.com/a/13663/11908 [2]: http://adsbit.harvard.edu/cgi-bin/nph-iarticle_query?1993A%26A...270..522L&defaultprint=YES&filetype=.pdf [3]: http://cdsarc.u-strasbg.fr/viz-bin/Cat?cat=VI%2F63& [4]: ftp://cdsarc.u-strasbg.fr/pub/cats/VI/63 [5]: ftp://cdsarc.u-strasbg.fr/pub/cats/VI/63/CLIVAR0N.ASC [6]: ftp://cdsarc.u-strasbg.fr/pub/cats/VI/63/CLIVAR0P.ASC [7]: ftp://cdsarc.u-strasbg.fr/pub/cats/VI/63/ReadMe [8]: http://vo.imcce.fr/insola/earth/online/earth/online/index.php [9]: https://i.stack.imgur.com/qkuMl.png [10]: https://www.aanda.org/articles/aa/pdf/2011/08/aa16836-11.pdf [11]: http://vo.imcce.fr/insola/earth/online/earth/earth.html
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