eqc  - Equator Crossing Tables
gdr - Geophysical Data Records (Cycle/Pass)
    poe - GDRs based on Precision Laser Orbits
        noaa - NOAA GDR Format - CD-ROM Image: Version 1.0b CD (Fall 2001 AGU)
           dvd_001 - DVD-ROM Image: Cycles 55-80, Version 1.2 DVD (JASON SWT, June 2002)
              code - Sample listing program
              docs - GDR Handbook
              gdrs - GDR data by cycle (linked to c### below)
              plots - Maps of SSH-MSS by cycle
           dvd_002 - DVD-ROM Image: Cycles 37-54, Version 1.3 DVD (August, 2002)
           c### - 17-day Cycles of GDR data
    moe - GDRs based on Medium Precision Laser Orbits
        noaa - NOAA GDR Format
           c### - 17-day Cycles of GDR data
gim - Ionosphere Corrections from JPL
    yy_mm - Daily Iono correction files
igdr - NOAA Interim Geophysical Data Records (Daily)
    code - Sample listing program
    doc - Format information
    moe - Medium precision orbit IGDRs
        yy_mm - Daily files
    ood - Operational Doppler orbit IGDRs
        yy_mm - Daily files
    poe - Precision laser orbits
        yy_mm - Daily files
ngdr - NAVO Geophysical Data Records (Daily)
    moe - Medium precision orbit IGDRs
        yy_mm - Daily files
    ood - Operational Doppler orbit IGDRs
        yy_mm - Daily files
    poe - Precision laser orbits
        yy_mm - Daily files
ood - NAVSOC Operational Doppler Orbits
    yy_mm - Daily files
sdr - Sensor Data Records
   cds - CD-ROM Images of SDR data
        cd## - Individual CD Image
    yy_mm - SDR data files (nominally 5 per day)
slr - NASA/GSFC Laser Orbits
   moe - Medium precision orbit ephemerides
       arcs - Computed orbit data
       predicts - Orbits including predicted extension
    poe - Precision laser orbit dephemerides
       arcs - Computed orbit data