Suchergebnisse

This article is an introduction to the subject of the experts' conference entitled 'The
Development of Navigation, Coastal Surveying and Oceanographic Surveying in the
History of Technology/ the Sciences." The author summarises the development of
navigation, coastal surveying, oceanographic surveying, nautical charts and maps of
the world as weil as of map-projection and sea-level-datum reference systems.

The history of legislation in Illinois in regard to canals, including the present scheme for a drainage ship canal.--The story of the Erie Canal. ; Mode of access: Internet.

The precision navigation capabilities of the Global Positioning System (GPS) are used extensively within US military operations. However, GPS is highly vulnerable to intentional and unintentional external interference. Therefore, a need exists to develop a non-GPS precision navigation method to operate in GPS degraded environments. This research effort presents the theoretical limits of a precision navigation method based on an inertial navigation system (INS) aided by angle measurements with respect to lunar surface features observed by a fixed camera. To accomplish this task, an extended Kalman filter (EKF) was implemented to estimate INS drift errors and bring in simulated lunar feature angle measurements to correct error estimates. The research scope focused solely on the feasibility of lunar vision aided navigation with INS where only measurement noise effects from a simulated CCD camera and barometer were considered. Various scenarios based on camera specifications, lunar feature quantity, INS grade, and lunar orbital parameters were conducted to observe the INS drift correction by lunar feature angle measurements. The resulting trade spaces presented by the scenarios showed theoretical substantial improvement in the navigation solution with respect to a stand alone INS.

Bureau Veritas has an interest in expanding the Guidelines for 'Ice Reinforcement Selection in Different World Navigation Areas' to include a chapter on Greenland Waters. This report contains the chapter for the guidelines and includes: 1) typical ice conditions, 2) selection of appropriate ice class, 3) legislation to be followed and 4) additional interesting meteorological parameters. A short supplement is included that provides further detail on source data and methods. ; NRC publication: Yes

From the preface: The object of this book is to contribute to the exchange of ideas between the navigator and the scientist and engineer in two ways. First, by painting a broad picture of navigation as a whole so that each problem may be seen against a wider background. Secondly, by attempting to suggest a common language appropriate to a study of navigation.