Geoid Modeling, grav-d and Height Mod



Yüklə 474 b.
tarix11.04.2018
ölçüsü474 b.
#37269


Geoid Modeling, GRAV-D and Height Mod






Gravimetric Geoid systematic misfit to BM’s but best fits “true” heights

  • Gravimetric Geoid systematic misfit to BM’s but best fits “true” heights

  • Hybrid Geoid “converted” to fit local BM’s, so best fits NAVD 88 heights

  • Conversion Surface model of systematic misfit derived from BM’s in IDB









GRAV-D: Gravity for the Redefinition of the American Vertical Datum

  • Official NGS policy as of Nov 14, 2007

    • $38.5M over 10 years
  • Airborne Gravity Snapshot

    • “Static Geoid”
  • Absolute/Satellite Gravity Tracking

    • “Time Dependent Geoid”
  • Re-define the Vertical Datum (using gravimetric geoid as reference surface) of the USA by 2017





For a more thorough discussion, see the USGG2009/GEOID09 session later today




Yüklə 474 b.

Dostları ilə paylaş:




Verilənlər bazası müəlliflik hüququ ilə müdafiə olunur ©www.genderi.org 2022
rəhbərliyinə müraciət

    Ana səhifə