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Consolidated Prediction Format Development Status at NASA SLR Bart Clarke HTSI

Consolidated Prediction Format Development Status at NASA SLR Bart Clarke HTSI. CPF Generation and Distribution. HTSI currently generating predictions in the CPF for all 21 satellites for which performs orbit determination CPF predictions distributed via email

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Consolidated Prediction Format Development Status at NASA SLR Bart Clarke HTSI

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  1. Consolidated Prediction Format Development Status at NASA SLR Bart Clarke HTSI

  2. CPF Generation and Distribution • HTSI currently generating predictions in the CPF for all 21 satellites for which performs orbit determination • CPF predictions distributed via email • MLRS receives all HTSI CPF satellite files • Zimmerwald receives HTSI BEC and Larets CPF files • Both stations have tracked successfully using the CPF predictions • CPF predictions are generated on new HTSI prediction platform.

  3. NASA Network Implementation • HTSI will begin implementation on NASA systems after completion of TLRS-4 project • NASA systems will be a more complex software modification than SLR2000 due to current use of polynomials for generated pointing angles • SLR2000 implementation has begun • Implementation will be less complex than Moblas and TLRS systems due to current use of mesh point file for generating pointing angles

  4. CPF Normal Point Generation • Generic Normal Point Processor (GNP 2.5.3) was modified to generate normal points using both an integrated CPF and an interpolated CPF • Three techniques (TIV, integrated CPF, interpolated CPF) were tested using 44 passes (53 pass segments) • “First look” at results indicate combination of integrated CPF and interpolated CPF appear to be adequate, but may have room for improvement • Differential correction of state vector eliminated in the CPF interpolation • State vector not tuned for the force model in the CPF integration

  5. CPF Normal Point Generation • TIV vs Integrated CPF and Interpolated CPF, 44 passes (53 pass segments) tested

  6. CPF Normal Point Generation

  7. CPF Normal Point Generation

  8. CPF Normal Point Generation

  9. CPF Normal Point Generation

  10. CPF Normal Point Generation

  11. CPF Normal Point Generation

  12. CPF Normal Point Generation

  13. CPF Normal Point Generation

  14. CPF Normal Point Generation

  15. CPF Normal Point Generation

  16. CPF Normal Point Generation

  17. Future Analysis • Need a detailed look at prediction quality • Predictions software generating CPF data is on new platform. • Take closer look at passes with normal point differences • Improve interpolated CPF normal pointing • Compare normal points to global fit

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