Results 61 to 70 of about 90,052 (317)
Spacecraft Flight in the Atmosphere [PDF]
, 2014 Spacecraft that orbit in Low Earth Orbit travel through a tenuous atmosphere and hence experience aerodynamic forces that can become quite significant, specially at low altitudes. The presence of these forces can become a major design driver for missions
Virgili Llop, Josep
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Trajectory and spacecraft design for a pole-sitter mission [PDF]
, 2014 This paper provides a detailed mission analysis and systems design of a pole-sitter mission. It considers a spacecraft that is continuously above either the North or South Pole and, as such, can provide real-time, continuous and hemispherical coverage of
Heiligers, Jeannette +3 more
core +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This review is about material design based on engineering multilevel sites from theoretical calculation and synthetic routes to mechanism, structure–activity relationship, challenges and perspectives for boosting hydrogen production in alkaline electrolyte. Electrolytic water splitting is a clean, carbon‐free method for producing green hydrogen and has
Ke Zhang +9 more
wiley +1 more source
Mathematical Methods in the Applied Sciences, EarlyView.ABSTRACT This paper develops a mathematical framework for interpreting observations of solar inertial waves in an idealized setting. Under the assumption of purely toroidal linear waves on the sphere, the stream function of the flow satisfies a fourth‐order scalar equation.
Tram Thi Ngoc Nguyen +3 more
wiley +1 more source
Manned Spacecraft Center Has Moved to…Houston!!
, 2018 Booklet outlining temporary office locations for the MSC in Houston ...
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Rest-to-Rest Slew Maneuver of Three-Axis Rotational Flexible Spacecraft [PDF]
, 2008 The article of record as published may be found at http://dx.doi.org/10.3182/20080706-5-KR-1001.02040This paper presents a slew maneuver control design of three-axis rotational flexible spacecraft.
Kim, J.J. +3 more
core +1 more source
Development of NMP‐001, A Nitromethane‐Based Green Propellant
Propellants, Explosives, Pyrotechnics, EarlyView.ABSTRACT This paper discusses the development of a model monopropellant that is aimed at exploring the applicability of nitromethane‐based propellants as an alternative to hydrazine. This approach addresses the challenges faced by HAN‐, ADN‐based propulsion by being more cost‐effective while providing similar performance figures.
Maxim Kurilov +3 more
wiley +1 more source
SensorsThe simulation of microwave absorption and external thermal flow is an essential aspect of the vacuum thermal testing process for Synthetic Aperture Radar (SAR) antenna.
Shangjie Pan +4 more
doaj +1 more source
Street Guide to NASA, Manned Spacecraft Center Leased Office Facilities
, 2018 Booklet containing a map of MSC leased office buildings in Houston ...
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Sliding Mode Control in Aerospace Applications: A Survey
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley +1 more source