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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sunrise
From: Stacy Hanna
Date: 2004 Jul 18, 20:06 -0400
From: Stacy Hanna
Date: 2004 Jul 18, 20:06 -0400
The times that you used for sunrise were actually the times for Civil Twilight, Using the correct times the answer would be: lat: 24-20 S long: 47 W Nautical Almanac 2003 20 6.34 24,20 X 30 6.53 ------- -------- 10* 19 m Dla = 24.20 - 20 = 4* 20' Table 1 page xxxii 10-4.20-4.30-19-20 --- corr. = 9 m X= 6.34 + 9 =6h 43m long: 47* 47*/15* = (ZD)3 x 15* = 45* --------- Dlo 2* conv. arc to time page i 2--- 8 m (w=+) 06 h 43 m ---------------- SUNRISE 6 h 51 m -----Original Message----- From: Navigation Mailing List [mailto:NAVIGATION-L@LISTSERV.WEBKAHUNA.COM] On Behalf Of Guus Dekker Sent: Sunday, July 18, 2004 14:38 To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM Subject: Sunrise What is wrong with my computation about sunrise at Sao Paolo at july 18 2003(three) lat: 24-20 S long: 47 W Nautical Almanac 2003 20 6.11 24,20 X 30 6.27 ------- -------- 10* 17 m Dla = 24.20 - 20 = 4* 20' Table 1 page xxxii 10-4.20-4.30-17-15 --- corr. = 7 m X= 6.11 + 7 = 6h 18m long: = 47* 47*/15* = (ZD)3 x 15* = 45* --------- Dlo 2* conv. arc to time page i 2--- 8 m (w=+) ---------------- SUNRISE 6h 26m (my navigator light 4.1. prog tells me the sunrise = at 6h 50m) ?????? Guus Dekker The Netherlands (Stedum : 53-19,24N 006-41,31E)