Thu Oct 08, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Neogi, Mukta and Oberheide, Jens, 2026. Migrating and Nonmigrating Neutral Mass Density Tides From GRACE–FO Observations for Solar Minimum Conditions. Earth and Space Science, 13(8):e2026EA005322, doi:10.1029/2026EA005322.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2026ESS...1305322N,
author = {{Neogi}, Mukta and {Oberheide}, Jens},
title = "{Migrating and Nonmigrating Neutral Mass Density Tides From GRACE-FO Observations for Solar Minimum Conditions}",
journal = {Earth and Space Science},
year = 2026,
month = aug,
volume = {13},
number = {8},
eid = {e2026EA005322},
pages = {e2026EA005322},
abstract = "{This study presents the migrating and nonmigrating thermospheric neutral
mass density tides from the Gravity Recovery And Climate
Experiment Follow--On (GRACE--FO) observations under solar
minimum conditions (year 2020). The observed densities are first
mapped to a reference altitude of 500 km using an empirical
model (NRLMSIS 2.0) to remove the impact of the elliptical
orbit. To address incomplete local solar time sampling due to
the slow orbit precession and to achieve full local solar time
coverage, 161--day composite windows centered on each analysis
day are constructed. A two--dimensional fast Fourier transform
is then applied in time and longitude to extract the amplitudes
and phases of migrating tides, including DW1, SW2, TW3, and QW4,
as well as nonmigrating tides such as DE3, DW2, and SE2. The
retrieved tides show distinct seasonal--latitudinal variability.
Migrating DW1 and SW2 are the dominant contributors to the
density tidal spectrum, while higher--order migrating components
such as TW3 and QW4 also produce significant variability at 500
km. A consistency check is also performed using the independent
CHAllenging Minisatellite Payload (CHAMP) relative density tidal
data set under comparable solar minimum conditions. The GRACE--
FO tidal structures show good agreement with CHAMP relative
density tides, supporting the reliability of the tidal
diagnostics. These results provide new observational constraints
on upper--atmospheric tidal dynamics and establish a framework
for using GRACE--FO neutral density measurements to study
vertical coupling and thermospheric variability, with important
implications for satellite orbit--drag prediction.}",
doi = {10.1029/2026EA005322},
adsurl = {https://ui.adsabs.harvard.edu/abs/2026E&SS...1305322N},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
Generated by
bib2html_grace.pl
(written by Patrick Riley
modified for this page by Volker Klemann) on
Thu Oct 08, 2026 16:44:00
GRACE-FO
Thu Oct 08, F. Flechtner