HR: 11:10h
AN: G22A-04 [Abstracts]
TI: GRACE Harmonic and Mascon Solutions at JPL
AU: * Watkins, M M
EM: michael.watkins@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, MS T1723-118,
Pasadena, CA 91109
United States
AU: Yuan, D
EM: Dah-Ning.Yuan@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, MS T1723-118,
Pasadena, CA 91109
United States
AU: Kuang, D
EM: Da.Kuang@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, MS T1723-118,
Pasadena, CA 91109
United States
AU: Bertiger, W
EM: Willy.Bertiger@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, MS T1723-118,
Pasadena, CA 91109
United States
AU: Kim, M
EM: Myung-Chan.Kim@Jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, MS T1723-118,
Pasadena, CA 91109
United States
AU: Kruizinga, G L
EM: Gerhard.Kruizinga@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, MS T1723-118,
Pasadena, CA 91109
United States
AB:
Gravity field solutions at JPL over the past few years have explored use of range, range-rate, and range-acceleration
K/Ka-band satellite-satellite data types (with and without GPS), and with both spherical harmonic and mascon-type local mass
representations. Until recently, resource and computing limitations have limited the scope of our mascon and other local
solutions to a few months and/or small spatial regions and the standard GRACE products have remained spherical harmonic
fields. The use of a new very large (~500 node) beowulf machine at JPL is now enabling a wider range of solutions over longer
time spans and deeper understanding of their characteristics. These include much higher spherical harmonic degrees,
mascons, and hybrids of the two. We will present the current status for several solution types, strengths and weaknesses of
each, and our assessments of limiting errors including data noise and aliasing sensitivity.
DE: 1214 Geopotential theory and determination (0903)
DE: 1217 Time variable gravity (7223, 7230)
DE: 1219 Gravity anomalies and Earth structure (0920, 7205, 7240)
SC: Geodesy [G]
MN: Fall Meeting 2005