Results 11 to 20 of about 137,144 (305)

A Simulation Experiment to Retrieve the Atmospheric Density and Three-Dimensional Wind Field by Double Falling Spheres

Atmosphere, 2020
Falling-sphere sounding remains an important method for in situ determination in the middle atmosphere and is the only determination method within the altitude range of 60–100 km.
Yue Wu, Zheng Sheng, Xinjie Zuo, Minghao Yang   +3 more
doaj   +2 more sources

Statistical Approach to Observe the Atmospheric Density Variations Using Swarm Satellite Data

Atmosphere, 2020
Over time, the initial algorithms to derive atmospheric density from accelerometers have been significantly enhanced. In this study, we discussed one of the accurate accelerometers—the Earth’s Magnetic Field and Environment Explorers, more commonly known
Md Wahiduzzaman, Alea Yeasmin, Jing-Jia Luo, Md. Arfan Ali, Muhammad Bilal, Zhongfeng Qiu   +5 more
doaj   +2 more sources

Progress in Atmospheric Density Inversion Based on LEO Satellites and Preliminary Experiments for SWARM-A

Remote Sensing
The vigorous development of Low Earth Orbit (LEO) satellite constellation programs imposes higher requirements for the accuracy of satellite orbit determination.
Xiaoyu Bian, Cunying Xiao, Shuli Song, Mengjun Wu   +3 more
doaj   +2 more sources

Atmospheric HDO Abundance Measurements in the Tibetan Plateau Based on Laser Heterodyne Radiometer

Remote Sensing
The Tibet Plateau is known as the “third pole” of the world, and its environmental change profoundly impacts East Asia and even the global climate. HDO is the stable isotope of water vapor, which acts as an ideal tracer for studying the water cycle, and ...
Xingji Lu, Yinbo Huang, Pengfei Wu, Jun Huang, Tao Luo, Qiang Liu, Zhensong Cao   +6 more
doaj   +2 more sources

Analysis of the Impact of Atmospheric Models on the Orbit Prediction of Space Debris

Sensors, 2023
Atmospheric drag is an important influencing factor in precise orbit determination and the prediction of low-orbit space debris. It has received widespread attention.
Yigao Ding, Zhenwei Li, Chengzhi Liu, Zhe Kang, Mingguo Sun, Jiannan Sun, Long Chen   +6 more
doaj   +1 more source

Nitrogen Isotopic Composition and Density of the Archean Atmosphere [PDF]

Science, 2013
Same As It Ever Was Nitrogen constitutes approximately 78% by volume of Earth's atmosphere and is a key component in its chemical and physical characteristics. It is not clear whether N 2 has been so abundant throughout Earth's geological history. Marty et al.
Marty, Bernard, Zimmermann, Laurent, Pujol, Magali, Burgess, Ray, Philippot, Pascal   +4 more
openaire   +3 more sources

Semi-Contained Interactions of Atmospheric Neutrinos in the MACRO Detector [PDF]

, 2002
Atmospheric neutrinos arise from the decay of particles (primarily pions, muons and kaons) produced in the collision of high energy cosmic ray particles with the atmosphere.
Nolty, R, Nolty, Robert G.
core   +1 more source

Longitudinal Variation of Thermospheric Density during Low Solar Activity from APOD Observations

Atmosphere, 2023
The longitudinal distribution of upper atmospheric density has been broadly studied. However, the studies mostly focused on 24 h averaged distribution.
Guangming Chen, Xie Li, Maosheng He, Shushi Liu, Haijun Man, Hong Gao, Yongping Li   +6 more
doaj   +1 more source

Characterization of uncertainties in atmospheric trace gas inversions using hierarchical Bayesian methods [PDF]

, 2014
We present a hierarchical Bayesian method for atmospheric trace gas inversions. This method is used to estimate emissions of trace gases as well as "hyper-parameters" that characterize the probability density functions (PDFs) of the a priori emissions ...
Li, S., M. Rigby, Ganesan, Anita Lakshmi, S. Park, Fraser, P. J., S. Li, S. J. O'Doherty, P. K. Salameh, Prinn, Ronald G., L. P. Steele, Ganesan, A. L., O'Doherty, Simon, A. Zammit-Mangion, Krummel, P. B., P. B. Krummel, Muehle, J., Zammit-Mangion, A., Prinn, R. G., Weiss, R. F., Muhle, Jens, Steele, L. P., Rigby, M., Manning, A. J., Kim, K. -R., A. J. Manning, A. L. Ganesan, R. F. Weiss, Park, S., Manning, Alistair J., C. M. Harth, P. J. Fraser, Harth, C. M., Salameh, P. K., K.-R. Kim, O'Doherty, S. J., J. Mühle, R. G. Prinn, Kim, K.-R.   +37 more
core   +1 more source

Анализ движения наноспутника SamSat-218Д по траекторным измерениям

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2019
Анализируется движение наноспутника SamSat-218Д по траекторным измерениям. Экспериментально подтверждены особенности поведения наноспутников на низких орбитах, обусловленные как влиянием атмосферы, так и присущими им массово-инерционными характеристиками:
И. В. Белоконов, И. А. Тимбай, П. Н. Николаев, У. М. Оразбаева   +3 more
doaj   +1 more source