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Brief introduction of YINGHUO-1 Micro-satellite for Mars environment exploration

Brief introduction of YINGHUO-1 Micro-satellite for Mars environment exploration. J. Wu, G. Zhu, H. Zhao, C. Wang, L. Lei, Y. Sun, W. Guo and S. Huang Center for Space Science and Applied Research, CAS Shanghai Astronomical Observatory, CAS. Yinghuo-1 (YH-1) mission.

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Brief introduction of YINGHUO-1 Micro-satellite for Mars environment exploration

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  1. Brief introduction of YINGHUO-1 Micro-satellite for Mars environment exploration J. Wu, G. Zhu, H. Zhao, C. Wang, L. Lei, Y. Sun, W. Guo and S. Huang Center for Space Science and Applied Research, CAS Shanghai Astronomical Observatory, CAS

  2. Yinghuo-1 (YH-1) mission Yinghuo (YH) -- Name of the mission China has long history of astronomical observation of Mars, the very first observation record was made during 475-221BC. The mission is named after the ancient Chinese name for Mars “YingHuo” Ying --- Red Huo --- unpredictable

  3. Fly opportunity with Phobos-Grunt • China and Russia signed the agreement in March 2007. The cooperation includes: • Piggy back launch of a Chinese Mars exploration satellite YH-1 (~115kg) • Russia will provide ground TTC support to YH-1 • Phobos-Grunt and YH-1 will carry out joint measurements of Martian space environment

  4. Fly opportunity with Phobos-Grunt

  5. Overview of the spacecraft YH-1 3 axis stabilized platform, with deployable solar panel Mass: 110kg Power: 90W (average) 180W (peak) payload mass: 11 kg payload power: 20 W nominal life time: 1 year

  6. Overview of the spacecraft • YH-1 orbit parameters： • apogee ~80,000 km • perigee 800 km • inclination 36 80000km 800km Orbit of Phobos

  7. Scientific objectives of YH-1 This orbit will well cover the areas of solar wind, bow shock, magnetosheath, magnetic pileup region, and tail and plasma sheet. Nagy et al.,2004

  8. Scientific Objectives • To study details of Martian space magnetosphere, ionosphere and the plasma distribution and their variations; • To study Martian ion escape mechanism, its implication for water loss. • To have moderate surveys of Martian surface topography, sandstorm and its influence on ionosphere; • To explore the Martian gravity field near equator by analyzing orbital data of YH-1.

  9. Scientific payloads of YH-1

  10. Sensor A Sensor B Solar panel YH-1 spacecraft Magnetometer • Flux-gate magnetometer, measures 3 components of magnetic field. • 2 sensors • double redundant • gradiometer to eliminate S/C remnance

  11. Magnetometer

  12. Plasma Package Plasma package • two identical ion analyzers • one electron analyzer • electronics

  13. Ion analyzer Electrostatic analyzer + TOF scheme, to resolve ion mass/direction/energy Specifications Field of view: 360160, 8 angular sectors in polar direction Energy range: 20eV-15keV Energy resolution: 7%, 96 bins Mass resolution: 1, 2, 4, 8, 16, >32 amu 2 identical ion sensors simultaneous measurements Better angular coverage and resolving ability Plasma package

  14. Electron analyzer Electrostatic analyzer Electron direction/energy spectrum Specifications Field of view: 9120 8 azimuth angular sectors Energy range: 20eV-15keV Energy resolution: 15%, 32 bins Plasma Package

  15. Occultation Receiver • Sensitivity: ≤-145 dBW; • Measuring accuracy of carrier phases: 1/100 cycle(0.02m); • Sampling rate: 10Hz; • Antenna polarization: linear polarization; • Operating frequencies: 833MHz, 416.5MHz

  16. Occultation Receiver • Receive signals at two frequencies from Phobos mission, • Ionosphere Occultation between YH-1 and Phobos • Focused on sub-solar and midnight ionosphere, never tapped by previous occultation due to limit of Sun-Earth-Mars geometry.

  17. Optical Imager CMOS Imaging Sensor

  18. Joint Operations • Besides independent observation of the Martian environment, joint operations with Phobos mission are also planned: • Two-point measurements of the Mars space environment • S/C to S/S radio occultation measurements • Data archiving and exchange

  19. Joint Operations • Two-point measurements of the Martian space environment

  20. Joint Operations • S/C to S/C radio occultation measurements • Before/after FGSC landed on Phobos

  21. Summary YH-1 and Phobos-Grunt are going to make a series scientific break through in the area of Mars space environment exploration. We should get fully prepared for these exciting events with good plans of joint operation.

  22. Thank You! IEEE Spectrum

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