358-Sightline Control Basics for Geo-Pointing and Locating - Part 1
By: Peter J. Kennedy, PE
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Course Objective
Describe theory and system level architectures
Course Description
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This is a three part course discussing geo-pointing and locating. With the proliferation of unmanned aerial vehicles (UAV) coupled with advancements in camera and inertial measurement sensor technology; this is fast becoming a technology used in many applications requiring geo-referenced imagery. Historical applications for military and civilian surveillance and navigation are fairly well documented and continue to grow. But the
technology is now the cornerstone for numerous situational awareness applications such as environmental, fire protection, road/bridge surveillance, maintenance and protection. It may even be part of your pizza delivery service, which for those of you with bevy of children could be a sobering thought.
The course is organized as three topics; the first addresses generic sightline control (SLC). As geo-locating requires geo-pointing and pointing requires maintaining a stable line of sight (LOS) to a targeted object or area, then an understanding of SLC is important. The second topic focusses on the geo-pointing problem given a stable sightline to the object to be geo-located. Finally the basics of geo-location, using direct and image geo-registration, are described. Many SLC sections in Part 1.0 require some background in control theory as well as mathematical operations with vectors and matrices. For those interested in geo-pointing and location at a system level; these sections will be somewhat tedious. However, it is not essential to follow all the math but it is important to understand the need for it and how it plays into an overall solution. Similarly there is a lot of detailed discussion on pointing techniques, for example one section is dedicated to using mirrors for pointing. The details may not be critical, but it is important to understand that with all the benefits obtained using a pointing mirror, they also have characteristics that must be understood and accounted for in the design or one will be in for a rather unpleasant surprise. Pointing design should follow a top down design procedure; beginning with requirements through HW and SW design and implementation. However given cost and schedule constraints, one is often forced into an off the shelf design with compromised performance. Understanding the design requirements, however, should not be compromised so related performance can be quantified and improved in future designs. The purpose of the course is to lay a framework for understanding this design process. There should be sufficient math detail for those interested at the equation level but hopefully adequate course structure for those not so inclined to still follow the overall design process. Test questions are at a system level. The course has a two part structure; Part 1.0 covers SLC basics and geo-pointing, Part 2.0 provides a brief review of Part 1.0 followed by a focus on geo-locating, and finally Part 3.0 describes camera sensor characteristics and requirements for geo-locating.
Review of: Sightline Control Basics for Geo-Pointing
Christopher P Rahaim
06/24/2022
Verified Buyer
Great Overview Course! Detailed enough to be a great refresher for the important Sightline Control Basics - yet at the right level for a general engineer to understand the requirements to look for when evaluating a geo-pointing system.
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