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GFO Cal/Val Meeting Silver Spring, Md 12 June 2001

GFO Cal/Val Meeting Silver Spring, Md 12 June 2001. J. McMillan Software Process Engineering Consulting Services. Fee Determination Assessments. Fee determination Crossover residual RMS RA noise estimate Data coverage estimate Data analysis and quality assurance

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GFO Cal/Val Meeting Silver Spring, Md 12 June 2001

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  1. GFO Cal/Val MeetingSilver Spring, Md12 June 2001 J. McMillan Software Process Engineering Consulting Services

  2. Fee Determination Assessments • Fee determination • Crossover residual RMS • RA noise estimate • Data coverage estimate • Data analysis and quality assurance • Timing and sizing anomalies • Crossover residual analysis • Orbit quick-look assessment • RA noise trend analysis (v. SWH)

  3. Fee DeterminationCrossover Residual RMS • Methodology fixed by contract • NOAA crossover location template • Data editing criteria • Latitude outside ±55º • UT 1/12º land mask • Timing anomalies • WFF Quality Word criteria • SSHustd ≥ 15 cm

  4. Fee DeterminationCrossover Residual RMS (cont.)

  5. Fee DeterminationRA Noise Estimate • Methodology fixed by contract (R. Sailor spectral analysis technique) • Data editing criteria - same as crossover residual RMS plus • AGC blooms (o ≥ 16 db) • Non-colinear passes • Colinear passes… • w/o sufficient geoid signal • w/o duration ≥ 2 min (no interpolation) • w/ average SWH ≤ 2.0 m (both passes)

  6. Fee DeterminationRA Noise Estimate (cont.) Cycles 00/01

  7. Fee DeterminationRA Noise Estimate (cont.)

  8. Fee DeterminationData Coverage Estimate • Methodology: comparison with NOAA crossover locations • Missing crossovers broken down by • Missing data (gap in NGDR) • RA not in fine track • Other WFF Quality Word editing criteria

  9. Fee DeterminationData Coverage (cont.)

  10. Data Analysis and QATiming and Sizing Anomalies • Timing anomalies - 2 types discovered • ∆t ≠ 0.98 sec. • Self-correcting • Not yet fixed • Occurs over water as well as land • Numerous occurrences in Cycle 03 • After Cycle 03, occurs 1 to 3 times per Cycle • Negative ∆t • Fixed by Ball after Cycle 05 • Size anomalies - compare gfoM & gfoo

  11. Data Analysis and QACrossover Residual Analysis

  12. Data Analysis and QAOrbit Quick-Look Assessment • Crossover residual daily histogram • 3-Day crossover residual analysis • SSHc - MSS

  13. Data Analysis and QARA Noise Trend Analysis (v. SWH)

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