Geosat Follow-On @ NOAA/LSA

Geosat Follow-On is a U.S. Navy altimeter mission that was launched on Feb 10, 1998. NOAA works together with the Naval Oceanographic Office to process the altimeter data and provides GDRs to the scientific research community (all data are unclassified).  We are actively analyzing both the Sensor Data Records (SDRs) and NAVO Interim GDRs (NGDRs) as part of the geophysical validation of the final NOAA GDRs. The links below provide documentation on both the NOAA and Navy altimetry products and provide access to these data sets. Links to Cal/Val presentations and posters for GFO are provided, along with a listing of external GFO-related websites. If you have any difficulty accessing the datasets, or need further information, please contact John Lillibridge.

• GFO Sensor Data Record Format, Contents, and Algorithms
• GFO System - Time Management
• Navy Geophysical Data Record Handbook
• NOAA Interim GDR Format and Processing
  
• NOAA Geophysical Data Record Handbook
• GFO Equator Crossing Tables in TAI (atomic) time and UTC time
• Non-Parametric Sea State Bias Model for GFO (LaBroue & Dorandeu, CLS, October 1, 2003)
  
• Sample IGDR code and GDR code
  

Via password-protected ftp:

GDR data are also available on DVD-R by special request. Browse the DVD images on our ftp site:

DVD_001: Cycles 55-80,     2000/11/09 - 2002/01/26
DVD_002: Cycles 37-54,     2000/01/07 - 2000/11/09 (Data prior to U.S. Navy acceptance)
DVD_003: Cycles 81-104,   2002/01/26 - 2003/03/12
DVD_004: Cycles 105-124, 2003/03/12 - 2004/02/16
DVD_005: Cycles 125-152, 2004/02/16 - 2005/06/07
DVD_006: Cycles 153-177, 2005/06/07 - 2006/08/02

• Towards the GEOSAT Follow-On Precise Orbit Determination Goals of High Accuracy and Near-Real-Time Processing, AIAA/AAS Astrodynamics Conference, August 21-24, 2006.  
• Geosat Follow-On Mission & Status, 2006 OSTST Meeting - Venice, March 16-18, 2006.  
• Evaluation of the Geosat Follow-On Precise Orbit Ephemeris, 2006 OSTST Meeting - Venice, March 16-18, 2006.  
• Geosat Follow-On Waveforms: Retracking for Hydrology Applications, ESA 15 Years of Progress in Radar Altimetry, March 13-15, 2006.  
• Geosat Follow-On Cal/Val, Briefing at the NPOESS Integrated Program Office, February 2, 2004.  
• Operational and Precise Orbit Determination for Geosat Follow-On Altimetry, OSU Geodetic Sciences 50th Anniversary: Heiskanen Symposium in Geodesy ,October, 2002.
• Geosat Follow-On GDR Status, Navy/NOAA Altimetry Meeting, Stennis Space Center, April 9, 2002.
• Operational and Precise Orbit Determination for Geosat Follow-On Altimetry, Fall 2001 AGU Meeting: EOS Trans. AGU, 82(47) Suppl., Dec. 10, 2001.
• GFO Cal/Val Meeting, NOAA Laboratory for Satellite Altimetry, June 12, 2001.
• GFO Radar Altimeter Performance Assessment - Hancock, Hayne, Lockwood, & Brenner, NASA/WFF & GSFC
  
• Algorithm Research Panel for Operational Altimetry Processing - Klingenberger & Vaughan, NAVO/Altimety Data Fusion Center
  
• NOAA’s Role in Geosat Follow-On - Lillibridge, NOAA/LSA
  
• NGDR Quality Analysis for Fee-Determination - McMillan, SPAWAR/Computer Sciences Corp.
  
• GFO Water Vapor Radiometer Performance Assessment - Ruf, Univ. Michigan/Dept. of Atmospheric, Oceanic & Space Sciences
• Quality Assessment of GFO Sensor and Data Products - Shum, Zhao, Yi & Luk, Ohio State Univ./Lab. for Space Geodesy & Remote Sensing Research
• Precise Orbit Determination for the GEOSAT Follow-On Spacecraft - Lemoine & Zelensky, NASA/GSFC
• Calibration & Validation of GFO Radar Altimeter Data, Spring 2001 EGS Meeting, Nice, France, March, 2001.
• GFO Operational Evaluation Meeting, U.S. Naval Observatory, July 20, 2000.
• GFO Radar Altimeter Performance, July 2000 - Hayne & Hancock, NASA/WFF
• Geosat Follow-On - Jacobs, NRL/Stennis
  
• GFO Cal/Val Timing Issues - Lillibridge, NOAA/LSA
• Ionospheric Calibration for the GFO Altimeter - Pi, Iijima, Mannucci, & Reyes, NASA/JPL
• Calibration/Validation Results for Geosat Follow-On, Spring 2000 AGU Meeting: EOS Trans. AGU, 81() Suppl., June 2, 2000.

• Navy SPAWAR - GFO Home Page and GFO Operational Status
• Naval Oceanographic Office
  
• Naval Research Laboratory/Stennis - Real-Time Ocean Environment from Altimetry
  
• Ball Aerospace - GFO Home Page
• NASA/WFF - GFO Home Page
• NASA/GSFC Space Geodesy Branch - Precise Orbit Determination
• Hughes/STX - GFO Precise Orbit Determination
• Ohio State Univ. - GFO Home Page
• Dr. Chris Ruf - Univ. of Michigan (GFO WVR)
• French AVISO DUACS - Multi-Mission Altimetry