How to convert degree to kilometres

N

NinhTH

Member
Messages
11
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Satellite
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Viet Nam
Hello friend,
Do you know how to convert 1 degree to kilometres in space?
Ex: one satellite orbit is 130E and another 131E so how many kilometre between two satelite? thank you
 
ozumo

ozumo

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489
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4x zone 2, 3x channel master 90cm, 1x channel master 1.2m
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South Durham
Distance of geostationary orbit to earth equator + distance from earth surface to the centre of the earth's core is your radius. Then work out diameter of a circle based on that radius, then divide by 360 for distance per degree. Of course that is distance around the circle's diameter, not in a straight line as the alien flies.
 
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hvdh

hvdh

Specialist Contributor
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2,097
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Dr.HD F16, TBS 5927, T-55, Laminas 120 cm
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Oss, NL (5.5°E 51.8°N)
Clarke belt radius is 6378 km (earth at equator) + 35786 km (GEO altitude) = 42164 km.
Clarke belt circumference is 2 * pi * 42164 = 264924 km
1 degree on the belt is 264924 / 360 = 736 km
Note: this is the distance as measured on the belt (curved).

Distance in a straight line is
2 * 42164 * sin ( degree difference / 2 )
 
Last edited:
Lazarus

Lazarus

Tout Rond Bon Oeuf
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80cm Motorised.
Several small Dishes.
Much else.
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North York Moors
Nobody has mentioned Radians yet?


(Whoops, I just did, but think I might have got away with it)
 
Analoguesat

Analoguesat

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Scottish Borders
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TM 5402HD
Skybox F3
Sky+ UK.
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Scottish Borders
Wont be accurate to more than a few kms anyway seeing as every satellite moves continually around its nominal slot.
 
N

NinhTH

Member
Messages
11
My Satellite Setup
Satellite
My Location
Viet Nam
Clarke belt radius is 6378 km (earth at equator) + 35786 km (GEO altitude) = 42164 km.
Clarke belt circumference is 2 * pi * 42164 = 264924 km
1 degree on the belt is 264924 / 360 = 736 km
Note: this is the distance as measured on the belt (curved).

Distance in a straight line is
2 * 42164 * sin ( degree difference / 2 )
Thank you so much
 
A

a33

Specialised Contributor
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704
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XSAT410
Rebox RE-9000
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NL
Are you having plans of traveling there?

(Just curious to what you want to do with this knowledge...)
:)

Greetz,
A33
 
Terryl

Terryl

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OpenBox X5 on a 1 meter motorized dish.
And now a 10 foot "C" band dish.

Custom built PC
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Deep in the Boonies in the central Sierra Nevada mountains of California.
Been there, not much going on these days.
 
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