نتایج جستجو برای: landing sites hassineh

تعداد نتایج: 287549  

2003
Scot C. R. Rafkin T. I. Michaels

[1] The Mars Regional Atmospheric Modeling System is used to predict meteorological conditions that are likely to be encountered by the Mars Exploration Rovers at several proposed landing sites during entry, descent, and landing. Seven areas, five of which contain specific high-priority landing ellipses, are investigated: Hematite (two sites), Isidis Planitia, Elysium Planitia (two sites), Vall...

Journal: :Journal of the American Mosquito Control Association 1997
A Ulloa M H Rodríguez A D Rodríguez D R Roberts

The abundance and age structure of Anopheles albimanus populations were estimated by UV updraft light traps and human landing catches within villages and in nearby breeding sites of southern México. Four villages and 5 breeding sites were selected for the study. Light trap and human landing catches were simultaneously carried out in each breeding site and each village. Anopheles albimanus was t...

2009
J. Guo C. Han AAS

Future lunar missions ask for the capability to perform precise Guidance, Navigation and Control (GNC) to the selected landing sites on the lunar surface. This paper studies the guidance issues for the lunar pinpoint soft landing problem. The primary contribution of this paper is the design of descent guidance law based on the Pontryagin maximum principle. The simulation shows that the proposed...

2013
Doreen Georgi Anke Assmann Fabian Heck Gereon Müller Martin Salzmann

In this paper I present an argument for a strictly derivational model of syntax based on timing of operations. Empirical evidence comes from opaque interactions of elementary operations which show that internal Merge (IM) must be split into two types: IM to intermediate landing sites and IM to nal landing sites. e split is motivated by the following observation: When both types of IMare trigge...

Journal: :Journal of Intelligent and Robotic Systems 2014
Shaowu Yang Sebastian Scherer Konstantin Schauwecker Andreas Zell

This paper presents a novel solution for micro aerial vehicles (MAVs) to autonomously search for and land on an arbitrary landing site using realtime monocular vision. The autonomous MAV is provided with only one single reference image of the landing site with an unknown size before initiating this task. We extend a well-known monocular visual SLAM algorithm that enables autonomous navigation o...

2005
Daniel Fitzgerald Rodney Walker Duncan A. Campbell

A computationally intelligent framework has been developed for the forced landing problem for uninhabited airborne vehicles (UAVs). This framework locates landing areas within an image that are of the appropriate geometrical size and free of obstacles. The surface-type of the candidate landing areas are classified into categories such as grass, trees and water. The classification results are co...

2017
Bryson Alberto Ndenga Francis Maluki Mutuku Harun Njenga Ngugi Joel Omari Mbakaya Peter Aswani Peter Siema Musunzaji John Vulule Dunstan Mukoko Uriel Kitron Angelle Desiree LaBeaud

Aedes aegypti is the main vector for yellow fever, dengue, chikungunya and Zika viruses. Recent outbreaks of dengue and chikungunya have been reported in Kenya. Presence and abundance of this vector is associated with the risk for the occurrence and transmission of these diseases. This study aimed to characterize the presence and abundance of Ae. aegypti adult mosquitoes from rural and urban si...

2004
Ayanna Howard Homayoun Seraji Max Bajracharya

This paper presents a novel multi-sensor information fusion methodology for landing hazard assessment and avoidance. The focus of this research is to analyze hazard characteristics of a planetary surface using imagery data obtained in real-time during spacecraft orbit, descent, or landing. This information is used to enable a spacecraft to safely touchdown on a planetary surface during mission ...

2006
Colin Theodore Dale Rowley David Hubbard Adnan Ansar Larry Matthies Steve Goldberg Matthew Whalley

This paper describes the flight testing and evaluation of technologies for the autonomous landing of a Yamaha RMAX helicopter at non-cooperative sites without the aid of GPS. The Yamaha RMAX used for these flight trials has been modified to include stereo cameras, a scanning laser, and an avionics payload. Machine vision stereo range mapping is used to generate an accurate terrain representatio...

2004
Daniel Fitzgerald Rodney Walker Duncan Campbell

This paper introduces the forced landing problem for UAVs and presents the machine-vision based approach taken for this research. The forced landing problem, is a new field of research for UAVs and this paper will show the preliminary analysis to date. The results are based on video data collected from a series of flight trials in a Cessna 172. The aim of this research is to locate " safe " lan...

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