LEO卫星轨道根数型星历参数与接口设计

doi:10.11947/j.AGCS.2019.20170701

测绘学报 ›› 2019, Vol. 48 ›› Issue (2): 198-206.doi: 10.11947/j.AGCS.2019.20170701

LEO卫星轨道根数型星历参数与接口设计

方善传¹, 杜兰², 高云鹏², 周佩元², 刘泽军²

1. 太原卫星发射中心技术部, 山西太原 030027;
2. 信息工程大学, 河南郑州 450001

收稿日期:2017-12-08 修回日期:2018-06-18 出版日期:2019-02-20 发布日期:2019-03-02
通讯作者: 杜兰 E-mail:lan.du09@gmail.com
作者简介:方善传(1992-),男,硕士生,研究方向为轨道力学与卫星导航。E-mail:fang.shanchuan@foxmail.com
基金资助:
国家自然科学基金（41774038；41804034）；地理信息工程国家重点实验室基金（SKLGIE2016-Z-2-4）；上海市空间导航与定位技术重点实验室基金（KFKT_201707）

Orbital elements ephemerides and interfaces design of LEO satellites

FANG Shanchuan¹, DU Lan², GAO Yunpeng², ZHOU Peiyuan², LIU Zejun²

1. Technical Department of Taiyuan Satellite Launch Center, Taiyuan 030027, China;
2. Information Engineering University, Zhengzhou 450001, China

Received:2017-12-08 Revised:2018-06-18 Online:2019-02-20 Published:2019-03-02
Supported by:
The National Natural Science Fundation of China (Nos. 41774038;41804034);The Fund of the State Key Laboratory of Geo-Information Engineering Laboratory (No. SKLGIE2016-Z-2-4);The Open Project of Shanghai Key Laboratory of Space Navigation and Positioning Techniques Fund (No. KFKT_201707)

摘要/Abstract

摘要：

低轨卫星是导航增强系统发展的新兴力量，具有独特优势。广播星历参数是其实现星基增强的重要指标。中轨GPS星历采用16/18参数模型，若直接用于LEO的星历参数拟合，卫星沿迹方向的位置分量拟合误差大，且对小偏心率近圆轨道有潜在的拟合法矩阵病态问题。基于第一类无奇点根数，通过增加或修改轨道沿迹向和径向摄动参数，设计了适用于近圆低轨卫星的16~19参数的5种星历模型。基于300~1500 km高度LEO的拟合试验表明：提出的16/17/18/18^*/19参数星历，URE最大值分别优于10/6/4/5/2.5 cm。最后，根据拟合参数的变化范围，对5个星历模型进行了接口设计。在数据截断对URE的影响为毫米量级要求下，总比特位分别为329/343/376/379/396，其中16/17参数星历模型比GPS16参数模型减少了29/15个，18/18^*/19参数星历模型比GPS18参数星历模型减少了64/61/41个。

关键词: LEO卫星, 广播星历, 第一类无奇点, 量化单位

Abstract:

Low earth orbit satellites, with unique advantages, are prosperous types of navigation augmentation satellites for the GNSS satellites constellations. The broadcast ephemeris element needs to be designed as an important index of the augmented LEOs. The GPS ephemerides of 16/18 elements cannot be directly applied to the LEOs because of the poor fitting accuracies in along-track positional component. Besides, the ill-conditioned problem of the normal-matrix exists in fitting algorithm due to the small eccentricity of the LEO orbits. Based on the nonsingular orbital elements, 5 sets of ephemerides with element numbers from 16 to 19 were designed respectively by adding or modifying orbital elements magnifying the along-track and radial positional components. The fitting experiments based on the LEO of 300 to 1500 km altitudes show that the fitting UREs of the proposed 16/17/18/18^*/19-element ephemerides are better than 10/6/4/5/2.5 cm, respectively. According to the dynamical range of the fitting elements, the interfaces were designed for the 5 sets of ephemerides. The effects of data truncation on fitting UREs are at millimeter level. The total bits are 329/343/376/379/396, respectively. 29/15 bits are saved for the 16/17-element ephemerides compared with the GPS16 ephemeris, while 64/61/41 bits can be saved for the 18/18^*/19-element ephemerides compared with the GPS18 elements ephemeris.

Key words: LEO satellites, broadcast ephemeris, nonsingular orbital elements of the first kind, quantization unit

中图分类号:

P228

方善传, 杜兰, 高云鹏, 周佩元, 刘泽军. LEO卫星轨道根数型星历参数与接口设计[J]. 测绘学报, 2019, 48(2): 198-206.

FANG Shanchuan, DU Lan, GAO Yunpeng, ZHOU Peiyuan, LIU Zejun. Orbital elements ephemerides and interfaces design of LEO satellites[J]. Acta Geodaetica et Cartographica Sinica, 2019, 48(2): 198-206.

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LEO卫星轨道根数型星历参数与接口设计

Orbital elements ephemerides and interfaces design of LEO satellites

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