Results 221 to 230 of about 271,699 (362)

On the Role of Field‐Aligned Density Ducts in Z‐to‐O Mode Conversion in the Ionosphere: A 2D Simulation Study

Geophysical Research Letters, Volume 52, Issue 15, 16 August 2025.
Abstract High‐frequency (HF) ordinary polarized (O)‐mode waves transmitted along the Earth's geomagnetic field can excite plasma modes on both the bottomside and topside of the ionosphere, a process attributed to O‐to‐Z mode conversion. This mechanism explains how electromagnetic wave energy penetrates beyond the resonance.
Danish Naeem, Dong‐Hun Lee, Kihong Kim
wiley   +1 more source

Dynamic analysis of rigid-flexible coupling spacecraft based on Euler parameters. [PDF]

Sci Rep
Ji Y, Zhang H.
europepmc   +1 more source

Development and application of NASA's first standard spacecraft computer [PDF]

, 1984
Charles E. Trevathan, Thomas D. Taylor, R. G. Hartenstein, Ann C. Merwarth, William N. Stewart   +4 more
openalex   +1 more source

Statistical Analysis of Trans‐Ionospheric Pulse Pairs and Inferences on Their Characteristics

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 15, 16 August 2025.
Abstract Trans‐ionospheric pulse pairs (TIPPs), first observed in 1993, are signatures of in‐cloud lightning discharges observed by satellite‐based broadband very high frequency (VHF) receivers. It has been definitively shown that TIPPs are the space‐based signatures of compact intracloud discharges (CIDs), and that the associated pair of pulses that ...
N. A. Pailoor, E. H. Lay, A. Nag, T. S. Anderson   +3 more
wiley   +1 more source

Genomic insights into novel extremotolerant bacteria isolated from the NASA Phoenix mission spacecraft assembly cleanrooms. [PDF]

Microbiome
Schultz J, Jamil T, Sengupta P, Sivabalan SKM, Rawat A, Patel N, Krishnamurthi S, Alam I, Singh NK, Raman K, Rosado AS, Venkateswaran K.   +11 more
europepmc   +1 more source

Minimum time attitude slewing maneuvers of a rigid spacecraft [PDF]

, 1988
Feiyue Li, Peter M. Bainum
openalex   +1 more source

Comprehensive Analysis of Bias in TEMPO NO2 Column Densities Through Pandora Observations

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 15, 16 August 2025.
Abstract Tropospheric Emissions: Monitoring of Pollution (TEMPO) is the first geostationary satellite instrument to monitor air pollutants across North America. This study uses Pandora observations to analyze the bias in TEMPO Level‐3 total column density of NO2 (TOTNO2) from August 2023 to December 2024.
Masoud Ghahremanloo, Caroline Nowlan, Gonzalo González Abad, Cecilia Garraffo, Xiong Liu, Huiqun Wang, Barron Henderson, Eric Baumann, Lukas Valin, Jeffrey A. Geddes, Xiaoyi Zhao   +10 more
wiley   +1 more source

A neural network based approach for thrust prediction in cold gas propulsion systems. [PDF]

Sci Rep
Farhid M, Ghavidel Aghdam MR, Shameli M.
europepmc   +1 more source

Interactive design and analysis of future large spacecraft concepts [PDF]

, 1981
L. B. Garrett
openalex   +1 more source

Constraints on the Feasibility of Ferrovolcanism on Asteroid 16 Psyche

Journal of Geophysical Research: Planets, Volume 130, Issue 8, August 2025.
Abstract Asteroid 16 Psyche's surface appears to be highly metallic, but its bulk density suggests a silicate‐rich interior. Ferrovolcanism has been suggested to explain how a silicate‐rich body could develop a metallic surface. This requires trapping of light elements bearing iron‐rich metallic melt in a core solidifying from the outside inwards.
J. J. Jorritsma, W. van Westrenen
wiley   +1 more source