<gh_stars>10-100
from __future__ import division, print_function
#import numpy as np
#import util
# from time import Epoch


# class State:
#     def __init__(self, s, epoch=Epoch(2000, 1, 1, 0, 0, 0), frame="MEE2000"):
#         self.s = s
#         self.t = epoch
#         self.frame = frame
# 
#     @property
#     def r(self):
#         return self.s[0:3]
# 
#     @property
#     def v(self):
#         return self.s[3:6]
