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Implement SGDP4_NEAR_SIMP propagation #124

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Nov 28, 2024
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Implement SGDP4_NEAR_SIMP propagation #124

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8 changes: 6 additions & 2 deletions pyorbital/orbital.py
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Original file line number Diff line number Diff line change
Expand Up @@ -794,8 +794,12 @@ def propagate(self, utc_time):
if self.mode == SGDP4_ZERO_ECC:
raise NotImplementedError('Mode SGDP4_ZERO_ECC not implemented')
elif self.mode == SGDP4_NEAR_SIMP:
raise NotImplementedError('Mode "Near-space, simplified equations"'
' not implemented')
tempa = 1.0 - ts * self.c1
tempe = self.bstar * ts * self.c4
templ = ts * ts * self.t2cof
a = self.aodp * tempa * tempa
e = em - tempe
xl = xmp + omega + xnode + self.xnodp * templ
elif self.mode == SGDP4_NEAR_NORM:
delm = self.xmcof * \
((1.0 + self.eta * np.cos(xmp))**3 - self.delmo)
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