An Analysis of Slant for Guidance of Landing Approaches.
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| Title: | An Analysis of Slant for Guidance of Landing Approaches. |
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| Authors: | Lintern, Gavan |
| Source: | International Journal of Aviation Psychology. 2000, Vol. 10 Issue 4, p363-376. 14p. 1 Diagram, 3 Graphs. |
| Subjects: | Landing aids, Landing of airplanes |
| Abstract: | For landing without visual aids, judgment of slant angle from texture gradients may be the primary strategy used by pilots to maintain a constant angle of descent toward a runway aimpoint. A mathematical analysis was undertaken to assess whether 1 or more of the available texture gradients have the properties required to support this strategy. The analysis revealed that texture gradients in themselves could not be useful. A relative gradient proportionalized against size of texture elements could, however, support descent-path control. Although not mathematically invariant, the departures from invariance of these relative gradients are too small to be functionally significant. In addition, relative gradients are sensitive to minimum functionally significant changes in angle of descent, whereas absolute gradients are not. Thus, relative gradients satisfy the formal requirements of an invariant for control of action. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Aviation Psychology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | For landing without visual aids, judgment of slant angle from texture gradients may be the primary strategy used by pilots to maintain a constant angle of descent toward a runway aimpoint. A mathematical analysis was undertaken to assess whether 1 or more of the available texture gradients have the properties required to support this strategy. The analysis revealed that texture gradients in themselves could not be useful. A relative gradient proportionalized against size of texture elements could, however, support descent-path control. Although not mathematically invariant, the departures from invariance of these relative gradients are too small to be functionally significant. In addition, relative gradients are sensitive to minimum functionally significant changes in angle of descent, whereas absolute gradients are not. Thus, relative gradients satisfy the formal requirements of an invariant for control of action. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 10508414 |
| DOI: | 10.1207/S15327108IJAP1004_4 |
