Temat: Celestial navigation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: MAAPCNIA: A Boost to Authentic MET Instruction
Autorzy:: Baylon, A.
Powiązania:: https://bibliotekanauki.pl/articles/116722.pdf
Data publikacji:: 2008
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Astronavigation
Maritime Education and Training (MET)
MET Instruction
Teaching Strategy
Celestial Navigation
Celestial Sphere
Celestial Fixing
Opis:: This paper presents an innovation in teaching strategy in one major subject in the Maritime Education and Training (MET) program of the Maritime Academy of Asia and the Pacific (MAAP). This strategy makes use of an instructional aid called MAAPCNIA (MAAP Celestial Navigation Instructional Aid), conceptualized and designed by Capt. Daniel S. Torres, Jr. MAAPCNIA encompasses color-coded spheres that depict navigational triangle. This triangle is composed of a blue celestial sphere representing horizon system of coordinates and a white sphere enclosing a globe characterizing time diagram and celestial equator and terrestrial systems of coordinates. With this instrument, celestial spheres can be easily visualized compared when using one-dimensional drawing. Hence, understanding of orthographic projection, which is essentially the core of appreciation and mastery of this tough subject, is enhanced. This paper focuses on the development and impact of MAAPCNIA since its conception in 2004, towards authentic teaching-learning process in Celestial Navigation.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2008, 2, 3; 285-290
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Estimation of Altitude Accuracy of Punctual Celestial Bodies Measured with Help of Digital Still Camera
Autorzy:: Bobkiewicz, P.
Powiązania:: https://bibliotekanauki.pl/articles/116884.pdf
Data publikacji:: 2008
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Astronavigation
Altitude Accuracy
Celestial Navigation
Digital Still Camera
Sextant
Calibration
Celestial Bodies
Accuracy of Position
Opis:: Measurement of altitude traditionally made with sextant may be done with help of digital still camera. Factors influencing accuracy of this measurement done with help of such a device are described in the paper. Values of errors introduced by each of these factors are estimated basing on example technical data of typical digital camera. This analysis shows, which factors are the most important and if accuracy of altitude is sufficient for purposes of celestial navigation.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2008, 2, 3; 279-284
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Some New Dimensions in Sextant-Based Celestial Navigation Aspects of Position Solution Reliability with Multiple Sights
Autorzy:: Zevering, K. H.
Powiązania:: https://bibliotekanauki.pl/articles/116559.pdf
Data publikacji:: 2008
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Astronavigation
Sextant
Celestial Navigation
Multiple Sights
Position Fixing
Sight Reduction Tables
least squares method (LSQ)
Running Fix Technique (RFT)
Opis:: The traditional approach relying on sight reduction tables, a non-programmatic location of the position fix and an inadequate allowance for observation errors is still widely pursued and advocated. In the late 1970s the programmatic Least Squares method (LSQ) was introduced which determines a random error fix (FixQ) for any multiple sights combination. B.D Yallop & C.Y Hohenkerk (1985) expanded LSQ to incorporate the computation of the random error margin of a fix. Several marketed PDA-based programs apply LSQ, but none have fully incorporated the random error margin as a guide for the navigator. All existing LSQ applications have two drawbacks. One is, all observation error is attributed to random sources, whereas the possibility of systematic error has in fact a long theoretical and practical background in celestial navigation. Systematic error represents a bias in statistical random error theory and can and should be allowed for. A major drawback is that existing LSQ program applications incorporate the running fix technique (RFT) traditionally applied in coastal navigation. It has no general validity in celestial navigation. The position circle of an earlier celestial sight can only be mathematically correctly transferred when its Geometric Position (GP) is transferred for the run data. A final aspect of reliability is the strategy adopted at the sight planning stage. At least during twilight observations, navigators should aim at getting three or four sights with a total azimuth angle >180o, with three successive subsights on each body. In such configurations FixQ and FixS will be relatively close together, generally obviating the need to process the sights for possible systematic error.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2008, 2, 3; 271-278
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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