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the claim

Modern ephemerides achieve high initial accuracy which degrades over time due to propagated observational errors.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
2 sources for · 0 against

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Is it true that modern ephemerides achieve high initial accuracy which degrades over time due to propagated observational errors?

Yes. Modern ephemerides start with high initial precision, but accumulated observational and modeling errors cause accuracy to degrade over extended propagation periods.

Verdict: SUPPORTED · 2 sources for, 0 against · Last checked

The analysis

The claim is specific and testable regarding orbital mechanics and ephemeris propagation errors. Papers [2] and [4] explicitly discuss how propagated ephemeris data (such as SGP4 or TLEs) accumulate increasing errors over time, necessitating error correction or tracking frameworks.

Evidence for · 2
Ephemeris Error Modeling in Opportunistic LEO Satellite Tracking with Pseudorange and Doppler Measurements
2023
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Hayek, S., Saroufim, J., & Kassas, Z. (2023). Ephemeris Error Modeling in Opportunistic LEO Satellite Tracking with Pseudorange and Doppler Measurements. doi.org. https://doi.org/10.33012/2023.19453

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More for · 1
A Double-Difference Doppler Shift-Based Positioning Framework With Ephemeris Error Correction of LEO Satellites
2024
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Hasan, M. A., Kabir, M. H., Islam, M. S., Han, S., & Shin, W. (2024). A Double-Difference Doppler Shift-Based Positioning Framework With Ephemeris Error Correction of LEO Satellites. doi.org. https://doi.org/10.1109/JSYST.2024.3457794

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Receipt History
first checked04 Aug 2026
judged → SUPPORTED · 8204 Aug 2026
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