Performance Analysis of Apollo Navigational Starter Routine . Figure 4: The Retum Trajectory critical point for Range and Angle noise is supported bythe RMS plot. After the same critical point, 20RA noise, the RMS begins to rapidly climb,and the confidence in the solution deteriorates proportionally. 12 Lunar Orbit Magnitude of Difference Between Converged State and Tmth Vereus Range and Angle Noise Levei - X Component-Y Component - Z Component - Difference Magnitude 10 12 Levei of Noise. Figure 5: The Limar Orbit case for Range and Angle noise shows an earlier drop inreliability at 18RA, inst
Performance Analysis of Apollo Navigational Starter Routine . Figure 4: The Retum Trajectory critical point for Range and Angle noise is supported bythe RMS plot. After the same critical point, 20RA noise, the RMS begins to rapidly climb,and the confidence in the solution deteriorates proportionally. 12 Lunar Orbit Magnitude of Difference Between Converged State and Tmth Vereus Range and Angle Noise Levei - X Component-Y Component - Z Component - Difference Magnitude 10 12 Levei of Noise. Figure 5: The Limar Orbit case for Range and Angle noise shows an earlier drop inreliability at 18RA, instead of 20RA. After this critical point, the estimation of the statevector begins to fluctuate wildly. Lunar OibitRoot Mean Square Aggregate veieus Noise Level 7 x10 (Range and Angle) e - - 5 ^ - 4 - 3 - - 2 - - Critical Point 1 1 VJ \ 1 —^<~^^ Figure 6: The RMS plot for the Limar Orbit case, however, shows a similar behavior to theother two cases. The critical point here is still noise level 20RA, though the state vectorestimation suffers before this point at noise level 18RA. 13 Earth Ortiit Diflerence Between Converged State and Tiutti Veieus Data Points/Otisenetion Time Standard Noise ?Ei s. E 5 l„ m i2^1 s -X Component - Y Component - Z Component - Magnitude Diflerence Figure 7: After 22 data points, the accuracy of the state vector estimation ceases toimprove. After the critical point at 22 data points, the estimation does not become better,however the confidence is
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