周子涵^1,,
王秀英^1,,,
杨德贺¹,
成万里²,
颜蕊¹,
何宏玮¹,
郭峰¹
1. 应急管理部国家自然灾害防治研究院, 北京 100085
2. 河南省地震局信阳地震台, 河南信阳 464031

基金项目: 应急管理部国家自然灾害防治研究院基本科研业务专项(ZDJ2019-22)，国家重点研发计划(2018YFC1503502-06)资助


详细信息

作者简介: 周子涵, 女, 1996年生, 硕士生, 主要从事空基地球物理观测数据应用研究.E-mail: zzhkiko6@163.com

通讯作者: 王秀英, 女, 1972年生, 博士, 研究员, 主要从事地基、空基地球物理观测数据的挖掘与应用研究, 以及地震灾害学研究.E-mail: 652383915@qq.com

中图分类号: P352

收稿日期:2021-01-25
修回日期:2021-04-08
上线日期:2021-11-10

Calibration of the LAP measurements obtained by ZH-1 satellite and analysis of the bias with that from Swarm B satellite

ZHOU ZiHan^1,,
WANG XiuYing^1,,,
YANG DeHe¹,
CHENG WanLi²,
YAN Rui¹,
HE HongWei¹,
GUO Feng¹
1. National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 100085, China
2. Xinyang Station of Henan Administration, Xinyang Henan 464031, China


More Information

Corresponding author: WANG XiuYing,E-mail:652383915@qq.com

MSC: P352

--> Received Date: 25 January 2021
Revised Date: 08 April 2021
Available Online: 10 November 2021


摘要
摘要:针对ZH-1卫星朗缪尔探针(LAP)原位电子密度观测数据远小于其他系统观测数据的问题，本文利用COSMIC及COSMIC 2在中纬度地区的掩星数据，得到对LAP数据的校正关系，并进一步利用与ZH-1具有相似飞行高度的Swarm B卫星全球等离子观测数据对校正后的LAP数据进行检验，以评估校正结果的准确性和可靠性.检验结果认为：(1)校正后的LAP数据与Swarm B数据基本一致，两者在中纬度地区符合较好，在赤道地区仍有明显偏差.(2)这一偏差与观测数据值的大小有关，在较小观测值时两者符合较好，较大观测值时差异变大，可能与两个卫星载荷的不同动态响应特性有关.(3)经过线性校正的LAP数据不会改变相对变化关系，但拓展了数据的应用场合.
关键词: ZH-1卫星/
LAP载荷原位电子密度观测/
数据校验/
COSMIC任务/
Swarm B卫星

Abstract:A problem is found from the LAP observations on board ZH-1 satellite that the in situ electron density measurements from this payload are much smaller than that from other simultaneous systems. To solve this problem, a calibration relationship is obtained using the collocated RO (Radio Occultation) data observed at mid-latitudes from the COSMIC and COSMIC 2 missions. The calibrated LAP measurements based on this relationship are validated using the collocated LP measurements from the Swarm B satellite orbiting at a similar altitude as that of the ZH-1 satellite to evaluate the accuracy and reliability of the calibrated data. The results show that: (1) The calibrated LAP measurements are generally in accord with the Swarm B measurements, and the two are in good agreement in mid-latitude regions, but a significant deviation is found in the equator and its adjacent regions. (2) This deviation is obviously related to data values; the two agree well when data values are relatively small, and the differences become larger when data values are relatively large, which may result from the different dynamic response characteristics of the payloads from the two missions. (3) The linear calibration does not change the relative variations in the LAP measurements, but it will expand the application domain of the data.
Key words:ZH-1 satellite/
In situ electron density measurements from LAP payload/
Calibration and validation/
COSMIC mission/
Swarm B satellite



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