球面矩形等面积网格(SREAG):若干特性
天体物理仪器与方法
2019-12-13 v1
摘要
Malkin(2019)提出了一种将球面分割为等面积矩形单元的新方法——球面矩形等面积网格(SREAG)。本文给出了SREAG若干更详尽的特性。使用32位整数编码时,SREAG可达到的最大环数为=41068,对应约16的最精细分辨率。测试了SREAG的计算精度。对于大,最差精度水平为。推导了用于根据所需单元数及所需分辨率计算环数的简表达式。
引用
@article{arxiv.1912.05593,
title = {Spherical Rectangular Equal-Area Grid (SREAG): Some features},
author = {Zinovy Malkin},
journal= {arXiv preprint arXiv:1912.05593},
year = {2019}
}
备注
Presented at the Journees 2019 "Astrometry, Earth rotation and Reference systems in the Gaia era", Paris, France, 7-9 Oct 2019. Supporting routines are included in the distribution