GFO Cal/Val Meeting Silver Spring, Md 12 June 2001 J. McMillan Software Process Engineering Consulting Services

GFO Cal/Val Meeting 12 June 2001 J. McMillan #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)

GFO Cal/Val Meeting 12 June 2001 J. McMillan #3 Fee Determination Crossover 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

GFO Cal/Val Meeting 12 June 2001 J. McMillan #4 Fee Determination Crossover Residual RMS (cont.)

GFO Cal/Val Meeting 12 June 2001 J. McMillan #5 Fee Determination RA 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)

GFO Cal/Val Meeting 12 June 2001 J. McMillan #6 Fee Determination RA Noise Estimate (cont.) Cycles 00/01

GFO Cal/Val Meeting 12 June 2001 J. McMillan #7 Fee Determination RA Noise Estimate (cont.)

GFO Cal/Val Meeting 12 June 2001 J. McMillan #8 Fee Determination Data 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

GFO Cal/Val Meeting 12 June 2001 J. McMillan #9 Fee Determination Data Coverage (cont.)

GFO Cal/Val Meeting 12 June 2001 J. McMillan #10 Data Analysis and QA Timing 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

GFO Cal/Val Meeting 12 June 2001 J. McMillan #11 Data Analysis and QA Crossover Residual Analysis

GFO Cal/Val Meeting 12 June 2001 J. McMillan #12 Data Analysis and QA Orbit Quick-Look Assessment Crossover residual daily histogram 3-Day crossover residual analysis SSHc - MSS

GFO Cal/Val Meeting 12 June 2001 J. McMillan #13 Data Analysis and QA RA Noise Trend Analysis (v. SWH)