GFO Radar Altimeter Performance (Preliminary) July 2, 1999

GFO Radar Altimeter Performance (Preliminary) July 2, 1999

GFO RADAR ALTIMETER PERFORMANCE July 2000 George S. Hayne/David W. Hancock III NASA GSFC/Wallops Flight Facility, Code 972 Contributors: Dennis W. Lockwood, Raytheon ITSS Ronald L. Brooks, Raytheon ITSS

Ngan Tran, Raytheon ITSS Anita Brenner, Raytheon ITSS Richard Sailor, TASC Wallops GFO Altimeter Role NASA representative for Radar Altimeter Performance Member of GFO Cal-Val Team

Data distribution to members of CAL-VAL Team Validate Radar Altimeter instrument related corrections Provide correction for instrument changes to NAVY by monitoring internal calibration mode and altimeter performance. NASA/GSFC Wallops Flight Facility - G

Wallops Involvement (To Date) with GFO Processing Pre-Launch Testing Cal-Val Provided Improved Temperature Correction for AGC Analysis of Effects from Loss of OnBoard Software Patch

Analysis of Record-to-Record Timing Problems Analysis of Processing for Apparent Range Drift Detected Tropospheric Correction Problem at Greenwich Longitude Crossings Noted Bad Data Apparently Resulting from Telemetry Download Problems

NASA/GSFC Wallops Flight Facility - G NAVY - Wallops Data Flow Daily RA Data (without waveforms) RA Cal Data (with waveforms) ENG Data (engineering)

WVR Data (water vapor) Sensor Data Records (SDR) As Soon As Available Navy Geophysical Data Records (NGDR) OODD (orbit)

Wallops - Cal/Val Team Data Flow SDR RA Cal Data OODD NASA/GSFC Wallops Flight Facility - G

Wallops-Recommended Editing Criteria Quality Word #1

Record is zero filled (bit 2) RA not in fine track (bit 3) No smoothed VATT(bit 7) SWH bounds error (bit 10)

Off Nadir error (bit 18) SWH STD error (bit 19) RA data frame missing (bits 22-31) (greater than 5 missing) Note: Also be sensitive to the bad value fill data.

NASA/GSFC Wallops Flight Facility - G NASA/GSFC Wallops Flight Facility - G NASA/GSFC Wallops Flight Facility - G NASA/GSFC Wallops Flight Facility - G

NASA/GSFC Wallops Flight Facility - G NASA/GSFC Wallops Flight Facility - G NASA/GSFC Wallops Flight Facility - G

NASA/GSFC Wallops Flight Facility - G NASA/GSFC Wallops Flight Facility - G NASA/GSFC Wallops Flight Facility - G NASA/GSFC Wallops Flight Facility - G

NASA/GSFC Wallops Flight Facility - G NASA/GSFC Wallops Flight Facility - G NASA/GSFC Wallops Flight Facility - G

GFO Range Measurement Noise, Including Results From Post-2000/122 Data *Place holder for R. Sailor results* NASA/GSFC Wallops Flight Facility - G

GFO Range Measurement Noise Compared with Other Satellite Altimeters *Place holder for R. Sailor results* NASA/GSFC Wallops Flight Facility - G

Comparison of GFO-Derived Windspeed with QUIKSCAT (GFO 17-DAY CYCLES) NASA/GSFC Wallops Flight Facility - G Comparison of GFO-Derived Windspeed with QUIKSCAT (GFO 17-DAY CYCLES)

(continued) NASA/GSFC Wallops Flight Facility - G Greenland Ice Sheet Coverage Description (Acquisitions and Typical Duration of Tracking Periods)

*Place holder for A. Brenners results* NASA/GSFC Wallops Flight Facility - G GFO Altimeter Data Errors 2000 Day 147 bad down link caused segments of ocean data to appear bad

200 Day 150 bad Sea Surface Height from apparently misaligned data Implies need to improve automated quality assurance on nGDR. Wallops can help develop recommendations. NASA/GSFC Wallops Flight Facility - G

Open Issues

Time Tag assigned in presence of bad data- (Ball has fix) Tropospheric correction problem at 0 deg Longitude SDR/nGDR data misalignment nGDR quality assurance Possible Sigma Naught/AGC calibration correction needed

Windspeed bias ( Possible offset or model) SWH Bias ( Possible) NASA/GSFC Wallops Flight Facility - G Conclusion The GFO Radar Altimeter (Configuration 1) is performing

well, instrument specifications have been met Recommend workshop to resolve open issues (Wallops and others) Recommend the GFO data flow be open to the Altimeter user community after open issues closed NASA/GSFC Wallops Flight Facility - G

Recently Viewed Presentations

  • Year 11 Parents Information Evening Mr Zamblera, Ms

    Year 11 Parents Information Evening Mr Zamblera, Ms

    Test spellings of Tier 2 and 3 language Use the Wrotham website for resources Encourage reading fiction and non-fiction to develop vocab Encourage stretch and challenge homework Year 11 Combined Science Teachers: Mrs Zdzylowski, Mrs Paul, Mr Fenniche, Mr Elcome...
  • Section 4.5 - cbafaculty.org

    Section 4.5 - cbafaculty.org

    Mehta, Danielson, & Berg Lecture Notes for Section 4.5. 1. D. 2. A. With the force P, a person is creating a moment M A using this flex-handle socket wrench. Does all of M A act to turn the socket?...
  • Information Modeling: 1.Entity Relation diagrams (ERD) 2. The ...

    Information Modeling: 1.Entity Relation diagrams (ERD) 2. The ...

    This diagram is known as an 'entity relationship diagram', E-R diagram or ERD. As part of your exam, you will have to draw or interpret an E-R diagram. Before you can do this, you need to be able to interpret...
  • The Amazing, Dr. Seuss Who was Dr. Seuss?

    The Amazing, Dr. Seuss Who was Dr. Seuss?

    Another of Dr. Seuss' most famous stories is a holiday book called How the Grinch Stole Christmas. Dr. Seuss loved to write stories with a rhyming pattern. If he needed to, he would make up a word to help him...
  • CV and Resume - Home - University Writing Center

    CV and Resume - Home - University Writing Center

    CV Examples: A CV (in progress) Curriculum Vitae First and Last name. 123 Street. Salt Lake City, Utah 84044. [email protected] 801-123-4567 Ph.D. Candidate
  • Introduction to Health Impact Assessment PHS 740 HIA

    Introduction to Health Impact Assessment PHS 740 HIA

    Health Impact Assessment. A combination of procedures, methods and tools that systematically judges the potential effects of a policy, programme or project on the health of a population and the distribution of those effects within the population. HIA identifies appropriate...
  • Phonics Parent Meeting Wednesday 19th September 2018 Read,

    Phonics Parent Meeting Wednesday 19th September 2018 Read,

    This video is available on the RMT website and Facebook page * Go through these sounds quickly with parents using My Turn/Your Turn. Stress you must not use letter names at this stage - just pure sounds. Emphasise getting rid...
  • Conflict - WordPress.com

    Conflict - WordPress.com

    Character vs. self. This type of conflict is going on inside the character. He or she may be struggling to make a . decision, do the right thing, or may have difficulty believing in . himself/herself. Illness. and a ....