156,691 research outputs found
The Moon │Project │ STEM
No full textToday, 3D has become a new and powerful form of expression, communication and knowledge transmission. With this powerful tool, the teacher will be able to articulate an attractive narrative and visual discourse. This resource promotes and develops critical thinking among students, stimulating an active education. 3D becomes a resource that facilitates the learning process, proposed as a training strategy that generates educational content and offers new challenges towards adequate digital literacy in students. The moon project wants to become a didactic unit, a 3D model of the moon in which there are contents from various space agencies, free of copyright, as well as various data extracted from Europeana. The pilot video shows how to use this tool anywhere, as a field trip, and using 3D technologies such as AR and VR.
The mission of AD&D 4D is to apply the latest technologies as interactive illustrations, and also as heuristic instruments of discovery.https://www.youtube.com/watch?v=CDoBRxn0n4
Navigating to the Moon along low-energy transfers
No full textThis paper presents a navigation strategy to fly to the Moon along a Weak Stability Boundary transfer trajectory. A particular strategy is devised to ensure capture into an uncontrolled relatively stable orbit at the Moon. Both uncertainty in the orbit determination process and in the control of the thrust vector are included in the navigation analysis. The orbit determination process is based on the definition of an optimal filtering technique that is able to meet accuracy requirements at an acceptable computational cost. Three sequential filtering techniques are analysed: an extended Kalman filter, an unscented Kalman filter and a Kalman filter based on high order expansions. The analysis shows that only the unscented Kalman filter meets the accuracy requirements at an acceptable computational cost. This paper demonstrates lunar weak capture for all trajectories within a capture corridor defined by all the trajectories in the neighbourhood of the nominal one, in state space. A minimum Delta v strategy is presented to extend the lifetime of the spacecraft around the Moon. The orbit determination and navigation strategies are applied to the case of the European Student Moon Orbiter
Orbit determination and control for the European Student Moon Orbiter
No full textThis paper presents the preliminary navigation and orbit determination analyses for the European Student Moon Orbiter. The severe constraint on the total mission Delta nu and the all-day piggy-back launch requirement imposed by the limited available budget, led to the choice of using a low-energy transfer, more specifically a Weak Stability Boundary one, with a capture into an elliptic orbit around the Moon. A particular navigation strategy was devised to ensure capture and fulfil the requirement for the uncontrolled orbit stability at the Moon. This paper presents a simulation of the orbit determination process, based on an extended Kalman filter, and the navigation strategy applied to the baseline transfer of the 2011-2012 window. The navigation strategy optimally allocates multiple Trajectory Correction Manoeuvres to target a so-called capture corridor. The capture corridor is defined, at each point along the transfer, by back-propagating the set of perturbed states at the Moon that provides an acceptable lifetime of the lunar orbit. (C) 2012 Elsevier Ltd. All rights reserved
Letter to F.D. Moon from A. Mitchell Salone regarding information about and photos of the Colored School in Wewoka
No full textLetter to F.D. Moon regarding a book being written on African American schools. The author asks for photos of the school and shows appreciation for how he runs the school
Moon Phases, Mood and Stock Market Returns: International Evidence
No full textWe employ recent data from 59 international emerging and mature stock markets to provide new evidence of a lunar cycle (full and new moon) effect on their stock market returns. Using a TGARCH model, we further examine the linkages between efficient-market theory, calendar-related effects and investors' mood resulted from moon phases. The empirical results show significant full moon effects in 6 markets, and significant new moon effects in 8 markets. In line with the theory, we report significant positive effect of new moon on stock market returns in 5 cases (UK, Switzerland, Bangladesh, Chile and Cyprus), while a negative effect of full moon is reported for the case of Jordan only. In addition, we find that lunar effects are strongly influenced by the calendar anomalies (Monday effect and January effect); several markets -mostly emerging markets- show evidence of full/new moon effects as well as Monday/January effects (Bangladesh, Brazil, Chile, Tunisia, Belgium, Cyprus). Further, we prove that the lunar phases are stronger outside America. These findings are recommended to investors, financial managers and analysts dealing with international stock indices
Navigation analysis and manoeuvres design for the European Student Moon Orbiter
No full textThis paper presents the latest results on the navigation and orbit determination analysis of the European Student Moon Orbiter (ESMO). The paper contains an investigation into the required orbit determination accuracy to inject the spacecraft into an orbit around the Moon that can be maintained without control for at least six months. A new baseline transfer is proposed together with a navigation strategy which fulfil the stringent requirement on the total propellant budget available for this challenging mission
Letter to F.D. Moon from C.R. Johns regarding appointment of F.D. Moon to the budget committee
No full textLetter appointing F.D. Moon to the budget committee of the Interscholastic Athletic Association and directs him to choose two others
Low-thrust trajectories design for the European Student Moon Orbiter mission
No full textThe following paper presents the mission analysis studies performed for the phase A of the solar electric propulsion option of the European Student Moon Orbiter (ESMO) mission. ESMO is scheduled to be launched in 2011, as an auxiliary payload on board of Ariane 5. Hence the launch date will be imposed by the primary payload. A method to efficiently assess wide launch windows for the Earth-Moon transfer is presented here. Sets of spirals starting from the GTO were propagated forward with a continuous tangential thrust until reaching an apogee of 280,000 km. Concurrently, sets of potential Moon spirals were propagated backwards from the lunar orbit injection. The method consists of ranking all the admissible lunar spiral-down orbits that arrive to the target orbit with a simple tangential thrust profile after a capture through the L1 Lagrange point. The 'best' lunar spiral is selected for each Earth spiral. Finally,comparing the value of the ranking function for each launch date, the favourable and unfavourable launch windows are identified
Letter to F.D. Moon from J. Woods regarding thanking Moon for a good experience working at Douglass High School
No full textLetter to F.D. Moon expressing thanks for a good experience working at Douglass High School
Letter from to F.D. Moon from the Senior class regarding a basketball tournament
No full textLetter to F.D. Moon from the senior class thanking Moon for allowing the annual basketball tournament
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