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Hua Zhao

Hua Zhao

Biography & lecture abstract

Hua Zhao was born in Anhui Province, China (1961). He studied plasma physics at the Modern Physics Department, University of Science and Technology of China (USTC), Hefei Province during 1979–1984. Then he enrolled at the Institute of Physics, Chinese Academy of Sciences(CAS) in Beijing as a graduate student, to investigate magnetic confined plasma fusion. He achieved his Ph.D degree in 1991 with a thesis entitled Electron Cyclotron Wave Heating Tokamak Plasma and Plasma Density Fluctuation Diagnosis by 4mm Wave Coherent Scattering. In 1992, he joined the Center for Space Science and Applied Research (CSSAR), of CAS, to research magnetospheric physics. He investigated spacecraft charging and active potential control at ESA-ESTEC as a visiting scholar in 1994, and continued his studies in this field at the Space Research Institute, Austrian Academy of Sciences, in 1995. He went to IGPP, UCLA during 1999–2000 to analyze geomagnetic pulsations. He participated in the payload development of the "Double-Star" mission during 2001–2004. Dr. Zhao is the leader of a group at CSSAR to develop the flux-gate magnetometer for the Yinghuo-1 Mars orbiter since 2005, and is the principal investigator of the Magnetic Field Investigation on the YH-1 mission.

Lecture: Contribution of Yinghuo-1 to the Martian gravity field model
The Yinghuo-1 micro-satellite would be launched together with Phobos-Grunt in November 2011 to investigate the space environment around Mars. YH-1 and Phobos-Grunt form a two-point measurement configuration in the Martian space environment, and are equipped with similar magnetic field and plasma detecting experiments. Their payloads would allow the two spacecraft to undertake a coordinated exploration of the planet Mars. YH-1 would orbit Mars with a periapsis of 800 km above the Martian surface, and an apoapsis of about 80000 km to the center of Mars. The orbit inclination is about 23 degrees to the Martian equator. A flux-gate type magnetometer, with two sensors, is developed for the YH-1 spacecraft. Two sensors are mounted on one side of the deployable solar panel with a radial separation of about 45 cm, to function as a gradiometer to minimize the affects of platform remanence. The dynamic range of the magnetometer is ± 256 nT with a 16-bit ADC converter, and the noise level is better than 0.01 nT/√Hz, to measure three-component magnetic field from DC to 10Hz. The flux-gate magnetometer would work together with the plasma package onboard of YH-1 to investigate the Martian bow shock, magnetosheath, magnetic pileup region (MPR). A detail description of the flux-gate magnetometer iwill be presented, as well as some test and calibration results.

Last Update: 1 September 2019
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5-May-2024 11:24 UT

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