def add_satellite(self, body_name, vi, s_name, r, m, target, d=0):
"""
Adds a satellite to the system a distance from the surface of a specific body
body_name: name of body the satellite starts at
vi: velocity of satellite
s_name: name of satellite
r: radius of satellite
m: mass of satellite
target: name of body satellite is aiming for
d: extra added distance from body, use when adding more than one satellite to body
"""
#Loops over bodies selecting the specified starting body
for body in self.bodies:
if body.name == body_name:
#Creates a new satellite with the given parameters
s = Satellite(s_name, 'green', m, r,
body.d - 2 * body.radius - d, vi, target)
#Calculates initial acceleration of satellite
s.get_init_accn(self.bodies)
#Adds satellite to system bodies and a circle to the patches for animation
self.bodies.append(s)
self.patches.append(
plt.Circle(s.r / const.PixelToKM / const.DistScaleFactor,
radius=s.radius / const.PixelToKM *
const.SatelliteScaleFactor,
color=s.c,
animated=True))
#Increment satellite couint and then break
self.satellite_count += 1
break
