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Navigation. Navigation. Chapter 3 Taking Sights and Finding LHA, Dec, and Ho. Overview Sight Reduction. Take sight on celestial body Record hs and time of sight to the second Convert ZT to UT Extract GHA from NA using UT Apply corrections to GHA to determine LHA

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  1. Navigation

  2. Navigation Chapter 3 Taking Sights and Finding LHA, Dec, and Ho

  3. Overview Sight Reduction • Take sight on celestial body • Record hs and time of sight to the second • Convert ZT to UT • Extract GHA from NA using UT • Apply corrections to GHA to determine LHA • Determine Dec • Apply corrections to hs to determine Ho • Reduce & plot sight - determine a LOP

  4. Learning Objectives • GHA corrections • Dec corrections • Altitude corrections • Compute LHA, Dec, and Ho

  5. Navigation What is the RA for a star with an SHA of 137° 24.8’? 359° 59.10’ • 137° 24.8’ 222° 35.2

  6. Almanac Adjustments ?

  7. Almanac Adjustments

  8. Altitude Adjustments ? ?

  9. Altitude Adjustments

  10. Pg 22&23 Moon Correction Tables

  11. Moon Correction Tables Two Part Correction: 1. Upper table use ha main correction always added 2. Lower table use HP same column LL or UL always added

  12. Moon Correction Tables Moon LL ha 45° 45.6’ Main +50.0’ HP 56.6’

  13. Moon Correction Tables Moon LL ha 45° 45.6’ Main +50.0’ HP 56.6’ 56.4 – 3.8 56.5 – 3.9 56.6 – 4.0 56.7 – 4.1 Add’l +04.0’

  14. Moon Correction

  15. Pg 2 T & B Corrections Air Temperature & Atmospheric Pressure Tables 50° F (10°C) – 1010 millibars • Observations ha < 15° • Correction may be plus or minus • All bodies • Only applied for EXTREMES • Sights below 15° not acceptable for sight folder?

  16. T & B Corrections March 23, Temp: 20°F; Pressure: 998mb, ha 10° NO ADJUSTMENT

  17. ‘v’ value & correction • Variable motion • Planets • Moon • “Increments and Corrections”

  18. High Altitude Sights

  19. Sight Reduction Exercise

  20. Navigation Class St Paul 1 of 2 Stars/Planets Corrections DST, time by atomic clock 2013 43°16.8’ 1 20 Mar Sun LL 0-0 +6 14-15-09 S N 23.5 2.0’ 44°57.6’N 92°46.4’W “ “ “ “ “ 2 “ “ “ “ 43°16.4’ Sun LOP 14-15-10 “ “ “ “ “ “ “ “ “ “ “ 3 14-15-12 43°15.8’ “ “ “ “ 4 Moon LL 16-05-14 32°06.6’ E Ds 7.0 44°57.5’N 92°47.1’W Distance 1.0nm “ “ “ “ “ “ “ “ “ “ 5 16-05-17 32°07.2’ “ “ “ “ “ “ “ “ “ “ 6 16-05-20 32°07.9’ Moon LOP “ “ “ “ “ Moon UL 7 44°57.5’N 92°47.1’W Distance 1.0nm, 2-body Fix 16-30-04 36°51.8’ E Ds “ “ “ “ “ “ “ “ “ “ 8 16-30-06 36°52.4’ “ “ “ “ “ “ “ “ “ “ 9 16-30-08 36°52.8’ “ “ “ “ 10 23.5 44°57.6’N 92°46.4’W Distance 1.0nm Sun LL 16-45-00 26°13.4’ SW Ds “ “ “ “ “ “ “ “ “ “ 11 2-body Fix 16-45-02 26°11.8’ “ “ “ “ “ “ “ “ “ “ 16-45-05 26°09.6’ 12

  21. Navigation Class St Paul 2 of 2 Stars/Planets Corrections DST, time by atomic clock 2013 13 20 Mar Rigel 0-0 +6 N 23.5 2.0’ 44°57.6’N 92°46.4’W 35°38.4’ Star LOP S 19-25-00 “ “ “ “ “ 14 “ “ “ “ 35°38.3’ “ 19-25-01 “ “ “ “ “ “ “ “ 35°38.0’ “ “ 19-25-03 15 “ “ “ “ “ “ “ Jupiter Ds 16 58°42.6’ SW 19-33-30 Distance 1.0nm “ “ “ “ “ “ “ “ “ “ Planet LOP 17 58°42.4’ 19-33-32 “ “ “ “ “ “ “ “ “ “ 58°42.0’ 19-33-35 18 “ “ “ “ 21 Mar 19 Sun LL 44°57.6’N 92°46.4’W DST, time by atomic clock, 45°24.1’ S 13-17-49 N Determine which sight is within 10 seconds of MT “ “ “ “ “ “ “ “ “ “ 20 45°25.3’ 13-17-58 “ “ “ “ “ “ “ “ “ “ 45°25.5’ 13-18-07 21 “ “ “ “ “ “ “ “ “ “ 45°25.7’ 13-18-16 22

  22. Sight Reduction Sight 2 – All (Pg 3 – 11 & 15) Sight 6 – Karen (Pg 3 – 14 & 22) Sight 7 – Jeff (Pg 3 – 14 & 23) Sight 11 – John (Pg 3 – 1 & 20) Sight 13 – Al (Pg 3 – 1 & 17) Sight 17 – Ben (Pg 3 – 1 & 19) Sight 21 – Terry (MT time) Dip Short formulas – Appendix A

  23. Pg 3,11&15 Sun LOP Sight Reduction Navigation Class All St Paul 20 Mar 2013 2 23 5 43 16 4 14 – 15 – 10 Sun LL 44 57 6 00 – 00 2 0 14 – 15 – 10 92 46 4 5 + 19 – 15 – 10 20 Mar 2013 g G 92 46 4

  24. Sun LOP Sight Reduction Navigation Class All St Paul 20 Mar 2013 2 23 5 43 16 4 14 – 15 – 10 Sun LL 44 57 6 00 – 00 2 0 14 – 15 – 10 92 46 4 4 7 ʘ 5 + 0 0 6 7 19 – 15 – 10 - 6 7 20 Mar 2013 43 09 7 g G ʘ 19 103 10 2 15 2 15 10 3 47 5 19 00 07 9 106 57 7 1 0 15 2 0 0 + 92 46 4 + - 0 3 15 2 + 14 11 3 00 08 2 43 24 9

  25. Pg 3,14&22 Moon LOP Sight Reduction Navigation Class Karen St Paul 20 Mar 2013 6 7 0 32 07 9 16 – 05 – 20 Moon LL 44 57 5 00 – 00 2 0 16 – 05 – 20 92 47 1 5 + 21 – 05 – 20 20 Mar 2013 g G 92 47 1

  26. Ds = (0.4156 x d) + [(0.5658 x h) / d] Ds = 0.4156 + 3.9606 = 4.3762 Moon LOP Sight Reduction Navigation Class Karen St Paul 20 Mar 2013 6 7 0 32 07 9 16 – 05 – 20 Moon LL 44 57 5 00 – 00 2 0 16 – 05 – 20 92 47 1 4 4 5 + 0 0 6 4 ʘ 21 – 05 – 20 - 6 4 20 Mar 2013 32 01 5 g G 54 5 21 29 56 1 58 0 1 4 05 20 1 16 4 12 2 + 1 1 21 18 36 5 + 31 13 6 4 4 59 4 0 0 - 92 47 1 + 59 4 - 0 4 - 298 26 5 18 36 1 33 00 9

  27. Pg 3,18&23 Moon LOP Sight Reduction Navigation Class Jeff St Paul 20 Mar 2013 7 7 0 36 51 8 16 – 30 – 04 Moon UL 44 57 5 00 – 00 2 0 16 – 30 – 04 92 47 1 5 + 21 – 30 – 04 20 Mar 2013 g G 92 46 4

  28. Ds = (0.4156 x d) + [(0.5658 x h) / d] Ds = 0.4156 + 3.9606 = 4.3762 Moon LOP Sight Reduction Navigation Class Jeff St Paul 20 Mar 2013 7 7 0 36 51 8 16 – 30 – 04 Moon UL 44 57 5 00 – 00 2 0 16 – 30 – 04 92 47 1 4 4 5 + 0 0 6 4 ʘ 21 – 30 – 04 - 6 4 20 Mar 2013 36 45 4 g G 54 5 21 29 56 1 55 6 1 9 30 04 7 10 5 12 2 30 0 + 6 2 21 18 36 5 + 37 12 8 4 4 57 5 30 0 - 92 47 1 + - - 2 2 27 5 304 25 7 18 34 3 37 12 9

  29. Pg 3,20&1 Sun LOP Sight Reduction Navigation Class John St Paul 20 Mar 2013 11 23 5 40 37 4 16 – 45 – 02 Sun LL 44 57 6 00 – 00 2 0 16 – 45 – 02 92 46 4 5 + 21 – 45 – 02 20 Mar 2013 g G 92 46 4

  30. Ds = (0.4156 x d) + [(0.5658 x h) / d] Ds = 0.4156 + 13.2963 = 13.7119 Sun LOP Sight Reduction Navigation Class John St Paul 20 Mar 2013 11 23 5 26 11 8 16 – 45 – 02 Sun LL 44 57 6 00 – 00 2 0 16 – 45 – 02 92 46 4 13 7 5 ʘ + 0 0 15 7 21 – 45 – 02 - 15 7 20 Mar 2013 25 56 1 g G ʘ 21 133 10 6 14 3 45 02 11 15 5 21 00 09 8 144 26 1 1 0 14 3 0 0 + 92 46 4 + - 0 8 14 3 + 51 39 7 00 10 6 26 10 4

  31. Pg 3,17&1 Star Sight Reduction Navigation Class Al St Paul 20 Mar 2013 13 23 5 35 38 4 19 – 25 – 00 Rigel 44 57 6 00 – 00 2 0 19 – 25 – 00 92 46 4 5 + 00 – 25 – 00 21 Mar 2013 g G 92 46 4

  32. Star Sight Reduction Navigation Class Al St Paul 20 Mar 2013 13 23 5 35 38 4 19 – 25 – 00 Rigel 44 57 6 00 – 00 2 0 19 – 25 – 00 92 46 4 4 7 5 + 0 0 6 7 00 – 25 – 00 - 6 7 21 Mar 2013 35 31 7 g 281 12 3 ɤ G ʘ ɤ 00 178 40 6 1 4 25 00 6 15 0 106 07 9 0 0 1 4 - 92 46 4 1 4 - 13 21 5 8 11 5 35 30 3

  33. Pg 3,1&19 Planet Sight Reduction Navigation Class Ben St Paul 20 Mar 2013 17 23 5 58 42 4 19 – 33 – 32 Jupiter 44 57 6 00 – 00 2 0 19 – 33 – 32 92 46 4 5 + 00 – 33 – 32 21 Mar 2013 g G ʘ 92 46 4

  34. Ds = (0.4156 x d) + [(0.5658 x h) / d] Ds = 0.4156 + 13.2963 = 13.7119 Planet Sight Reduction Navigation Class Ben St Paul 20 Mar 2013 17 23 5 58 42 4 19 – 33 – 32 Jupiter 44 57 6 00 – 00 2 0 19 – 33 – 32 92 46 4 13 7 5 + 0 0 15 7 00 – 33 – 32 - 15 7 21 Mar 2013 58 26 7 g G ʘ 00 110 05 4 0 6 33 32 8 23 0 2 1 + 1 2 00 21 33 0 + 118 29 6 0 1 0 0 0 6 + - 92 46 4 - 0 1 0 6 + 25 43 2 21 33 1 58 26 1

  35. Meridian Transit 21 Mar 2013 Terry 44 57 6 92 46 4 92 46 4

  36. Meridian Transit 21 Mar 2013 Terry 44 57 6 92 46 4 92 46 4 18 88 14 5 4 31 9 18 07 18 – 18 – 07 5 - 13 – 18 – 07

  37. Sight Averaging

  38. Sight Averaging [(seconds / 60) + minutes] / 60 26.64167 5.95167 26.92500 5.96639 27.03500 5.98056 27.16167 5.99444 27.28500 6.01361 135.04834 29.90667 27.009668 5.981334 27° 00.6’ 05-58-53

  39. Sight Averaging

  40. Sight Averaging

  41. Sight Averaging

  42. Sight Averaging

  43. Sight Averaging

  44. Navigation Next week bring your plotting tools & calculator CHAPTER 4 Reduce and Plot

  45. Taking Sights and Finding Ho, LHA, Dec The End

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