How to convert degree to kilometres

NinhTH

Member
Joined
Jun 18, 2020
Messages
21
Reaction score
0
Points
1
Age
39
My Satellite Setup
Satellite
My Location
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

te wo tsuite
Staff member
Joined
May 26, 2020
Messages
5,197
Reaction score
2,595
Points
113
My Satellite Setup
Raven mk2 zone 2 x4, Channel Master: 90cm x3, 1.2m x2, 1.8m PF. CM polar mount x2, Az/El x3.
My Location
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.
 
Last edited:

hvdh

Specialist Contributor
Joined
Dec 10, 2004
Messages
2,357
Reaction score
3,336
Points
113
Age
59
Website
gso-satellites.nl
My Satellite Setup
Dr.HD F16, TBS 5927, T-55, Laminas 120 cm
My Location
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

Retired Moderator
Joined
May 29, 2009
Messages
27,078
Reaction score
8,664
Points
113
My Satellite Setup
80cm Motorised.
Several small Dishes.
Much else.
My Location
North York Moors
Nobody has mentioned Radians yet?


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

Analoguesat

Administrator
Staff member
Joined
Jul 26, 2003
Messages
50,739
Reaction score
11,220
Points
113
Location
Scottish Borders
My Satellite Setup
TM 5402HD
Sky+ UK.
My Location
Scottish Borders
Wont be accurate to more than a few kms anyway seeing as every satellite moves continually around its nominal slot.
 

NinhTH

Member
Joined
Jun 18, 2020
Messages
21
Reaction score
0
Points
1
Age
39
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
 

a33

Specialised Contributor
Joined
Sep 24, 2009
Messages
1,237
Reaction score
710
Points
113
Age
63
My Satellite Setup
XSAT410
Rebox RE-9000
My Location
NL
Are you having plans of traveling there?

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

Greetz,
A33
 

Terryl

Specialist Contributor
Joined
Apr 14, 2011
Messages
3,246
Reaction score
1,932
Points
113
Age
82
My Satellite Setup
OpenBox X5 on a 1 meter motorized dish.
And now a 10 foot "C" band dish.

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