نتایج جستجو برای: orbiting satellites

تعداد نتایج: 17102  

Journal: :Applied sciences 2022

The population of satellites in Low Earth Orbit is predicted to growth exponentially the next decade due proliferation small-sat constellations. Consequently, probability collision expected increase dramatically, possibly leading a potential Kessler syndrome situation. It therefore necessary strengthen all technologies required for avoidance and end-of-life disposal new satellites, together wit...

Journal: :Remote Sensing of Environment 2022

Biomass burning influences atmospheric composition and regional air quality. The hourly biomass-burning emissions are usually required by quality models, yet most available emission inventories provide daily or monthly estimates in 0.1° coarser grids, limiting the prediction accuracy. Advanced Baseline Imager (ABI) on Geostationary Operational Environmental Satellites – R Series (GOES-R) observ...

2003
David A. Bearden

Under constrained budgets and rigid schedules, NASA and industry have greatly increased their utilization of small satellites to conduct low-cost planetary investigations. Recent failed small planetary science spacecraft such as Mars Polar Lander (MPL) and Mars Climate Orbiter (MCO), and impaired missions such as Mars Global Surveyor (MGS) have fueled the ongoing debate on whether NASA’s “Faste...

Journal: :فیزیک زمین و فضا 0
مهروز خادمی کارشناس ارشد ژئودزی، گروه مهندسی نقشه برداری، دانشکده نقشه برداری، دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران مهدی نجفی علمداری دانشیار، گروه مهندسی نقشه برداری، دانشکده نقشه برداری، دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران محمدعلی شریفی استادیار، گروه مهندسی نقشه برداری، پردیس دانشکده های فنی، دانشگاه تهران، ایران

the recent dedicated satellite gravimetry missions have provided huge amount of high quality gravity data with global coverage. from computational point of view, estimation of the unknown gravity field parameters is a highly demanding task due to the sheer number of observations and the unknown coefficients. different computational schemes have been proposed to tackle the problem. since the ear...

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