The Fluxgate Magnetometer (MAG) on Board Aditya-L1 Spacecraft

IF 2.7 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Solar Physics Pub Date : 2025-03-18 DOI:10.1007/s11207-025-02440-0

Vipin K. Yadav, Y. Vijaya, B. Krishnam Prasad, P. T. Srikar, Monika Mahajan, K. V. L. N. Mallikarjun, Syeeda N. Zamani, Satyanarayana Kumari B., K. A. Lohar, M. M. Kandpal, S. Narendra, Vijay S. Rai, Abhijit A. Adoni, D. R. Veeresha, Smaran T.S., Kalpana A., Nandita Srivastava, Geeta Vichare

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Abstract

The Fluxgate Magnetometer (MAG) is one of the seven instruments on board Aditya-L1 spacecraft to sample the local magnetic field environment around the first Lagrangian point (L1) while continuously observing the Sun. These in situ magnetic field measurements are crucial in detecting coronal mass ejections (CMEs), as well for space weather studies in the vicinity of the Earth, and the apparent detection of solar plasma wave signatures at L1. The MAG payload has a set of fluxgate magnetic sensors mounted on the Sun-viewing panel deck and is configured to deploy along the negative roll direction of the spacecraft. Two sets of triaxial fluxgate sensors are mounted on a 6-m long boom with one set at the tip of the boom and the other at the centre of the boom around 3 m away from the spacecraft towards the boom tip. The boom is mounted to be deployed along the –roll axis of the spacecraft. The power supply and the processing electronics for the MAG payload are enclosed in a box, which is placed inside the +yaw panel of the spacecraft. Each of the two triaxial fluxgate sensors measures the interplanetary magnetic field vectors at L1 in the default range of ± 256 nT per axis once every 125 ms. The observed magnetic field data is time stamped at the spacecraft with the on board clock and transmitted to ground once every day when the visibility is for 12 hours, along with the house-keeping parameters, ephemeris, and the science data from the other six payloads.

In this technical paper, the Aditya-L1 MAG instrument details are presented, along with the initial observations in the halo-orbit around L1.

Abstract Image

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Aditya-L1航天器上的磁通门磁强计

磁通门磁强计（MAG）是Aditya-L1航天器上的七个仪器之一，用于在连续观测太阳的同时对第一拉格朗日点（L1）周围的局部磁场环境进行采样。这些现场磁场测量对于探测日冕物质抛射（cme）、地球附近的空间天气研究以及L1处太阳等离子体波特征的明显探测至关重要。MAG有效载荷有一组磁通门磁传感器安装在太阳观测面板甲板上并且被配置为沿着航天器的负滚转方向部署。两组三轴磁通门传感器安装在6米长的吊杆上，一组安装在吊杆顶端，另一组安装在吊杆中心，距航天器约3米，朝向吊杆顶端。吊杆安装在航天器的横轴上。用于MAG有效载荷的电源和处理电子设备被封装在一个盒子中，它被放置在航天器的+偏航面板内。两个三轴磁通门传感器每125毫秒测量一次在L1处的行星际磁场矢量，默认范围为每轴±256 nT。观测到的磁场数据在航天器上用机载时钟进行时间标记，并在能见度为12小时时每天向地面传输一次，同时传输的还有管理参数、星历表和其他6个有效载荷的科学数据。在这篇技术论文中，介绍了Aditya-L1 MAG仪器的细节，以及在L1周围的晕轨道上的初步观测结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Solar Physics 地学天文-天文与天体物理

CiteScore

5.10

自引率

17.90%

发文量

146

审稿时长

1 months

期刊介绍： Solar Physics was founded in 1967 and is the principal journal for the publication of the results of fundamental research on the Sun. The journal treats all aspects of solar physics, ranging from the internal structure of the Sun and its evolution to the outer corona and solar wind in interplanetary space. Papers on solar-terrestrial physics and on stellar research are also published when their results have a direct bearing on our understanding of the Sun.