Thu Apr 10, F. Flechtner
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Purkhauser, Anna F. and Pail, Roland, 2020. Triple-Pair Constellation Configurations for Temporal Gravity Field Retrieval. Remote Sensing, 12(5):831, doi:10.3390/rs12050831.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2020RemS...12..831P,
author = {{Purkhauser}, Anna F. and {Pail}, Roland},
title = "{Triple-Pair Constellation Configurations for Temporal Gravity Field Retrieval}",
journal = {Remote Sensing},
keywords = {future gravity missions, time variable gravity, near-real time, numerical simulation, spherical harmonics},
year = 2020,
month = mar,
volume = {12},
number = {5},
eid = {831},
pages = {831},
abstract = "{The goal of next-generation gravity missions (NGGM) is to improve the
monitoring of mass transport in the Earth system by an increased
space-time sampling capability as well as higher accuracies of a
new generation of instrumentation, but also to continue the
monitoring time series obtained by past and current missions
such as GRACE and GRACE Follow-On. As the likelihood of three
satellite pairs being simultaneously in orbit in the mid-term
future increased, we have performed a closed-loop simulation to
investigate the impact of a third pair in either polar or
inclined orbit as an addition to a Bender-type constellation
with NGGM instrumentation. For the additional pair, GRACE-like
as well as NGGM instrumentation was tested. The analysis showed
that the third pair mainly increases the redundancy of the
monitoring system but does not significantly improve de-aliasing
capabilities. The best-performing triple-pair scenario comprises
a third inclined pair with NGGM sensors. Starting with a Bender-
type constellation of a polar and an inclined satellite pair,
simulation results indicate an average improvement of 11\% in
case of adding the third pair in a near-polar orbit, and of 21\%
for the third pair placed in an inclined orbit. The most
important advantage of a multi-pair constellation, however, is
the possibility to recover daily gravity fields with higher
spatial resolution. In the case of the investigated triple-pair
scenarios, a meaningful daily resolution with a maximum
spherical harmonic degree of 26 can be achieved, while a higher
daily parametrization up to degree 40 results in spatial
aliasing and thus would need additional constraints or prior
information.}",
doi = {10.3390/rs12050831},
adsurl = {https://ui.adsabs.harvard.edu/abs/2020RemS...12..831P},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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