青馬大橋日落 Tsing Ma Bridge sunset

photo from Thomas Ku

 

the UTM coordinates in photo are just for reference

 The vertical field of view is ~ 13.5 deg, which is 200mm equivalent for Full Frame camera
 
wider view:

1. get co-ordinates of east and west tower

east tower (Tsing Yi Tower)
22.352942, 114.080527

west tower (Ma Wan Tower)

22.349350, 114.067620

fwd
253.346286°     

bck
73.341378°     

dist between towers
1387.725 metres

height of towers:
206 m

distance between towers : 1377 m
height of sun at west tower : 152 + (191-152)/2 = 171.5  m
height of sun at east tower: 107 + (152-107)/2 = 129.5 m

delta h : 42 m

atan(42/1377)= 1.747 deg ( 3.5 deg max)

where to take photo:

loc1: (22.354160, 114.088753)

loc2: 22.354442 N 114.086452 E
height: (~170m???)  should be around 103 m, to < 148m
dist to west tower: (from google map measure tool)

Loc1 :

2250 m

Loc2:

2014 m  

 

in 2021:

loc1:

31 Oct 17:35

next occurrence ( 2 times in a year):

loc1:

2 Feb 22 18:05

https://www.suncalc.org/#/22.3494,114.0676,14/2022.02.06/18:05/1/0

loc2:

https://www.suncalc.org/#/22.3545,114.0864,14/2022.02.11/18:05/1/0

loc1:
3 nov 22 17:36,

https://www.suncalc.org/#/22.3494,114.0676,14/2022.11.03/17:36/1/0 

loc2:

30 oct 17:39 or 1 Nov 

do site survey on 27 oct. sun should be just outside right (north) frame, azimuth 255.5 deg

https://www.suncalc.org/#/22.3545,114.0864,14/2022.10.30/17:39/1/0

2023:

31 Oct

https://www.suncalc.org/#/22.3545,114.0864,14/2023.10.31/17:29/1/0

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