@Article{GouveiaSapuMoniAlve:2020:AsNeAt,
author = "Gouveia, Tayn{\'a} Aparecida Ferreira and Sapucci, Luiz Fernando
and Monico, Jo{\~a}o Francisco Galera and Alves, Daniele Barroca
Marra",
affiliation = "{Universidade Estadual Paulista (UNESP)} and {Instituto Nacional
de Pesquisas Espaciais (INPE)} and {Universidade Estadual Paulista
(UNESP)} and {Universidade Estadual Paulista (UNESP)}",
title = "Assessment of neutral atmospheric delay predictions based on the
temporal resolution of an atmospheric model",
journal = "Boletim de Ci{\^e}ncias Geod{\'e}sicas",
year = "2020",
volume = "26",
number = "1",
pages = "e2020001",
keywords = "Neutral atmospheric delay modeling, GNSS positioning, Atmospheric
model.",
abstract = "In Global Navigation Satellite Systems (GNSS), the effects of
neutral atmosphere in electromagnetic signal propagation impacts
directly on the quality of the final estimated position, leading
to errors in the metric order. Using an atmospheric model is a
good strategy to minimize these errors, because it becomes
possible to obtain a neutral atmospheric delay with the same
spatial and temporal resolution, taking into consideration
particularities of the atmosphere treated by a numerical model.
The regional model of the Center for Weather Forecasting and
Climate Studies (CPTEC) used in this paper has a spatial
resolution of 15 km and a temporal resolution of 3 hours. Usually,
the delay prediction of 3 hours is interpolated in time to GNSS
applications and this can influence the quality of the values
obtained in each interpolated epoch. Higher temporal resolutions
can lead to lower errors in the final position. In this paper, the
quality of delay predictions is evaluated for this atmospheric
model with resolutions of 6 and 3 hours. The estimated delay,
derived from meteorological data in the same location as the
geodetic data, is considered as {"}truth{"}. The temporal
resolution of 3 hours shows better results than using 6 hours,
particularly for the hydrostatic component in the initial
prediction period, RMSE of 1.25 cm was reduced to 0.2 cm in NEIA
station.",
doi = "10.1590/s1982-21702020000100001",
url = "http://dx.doi.org/10.1590/s1982-21702020000100001",
issn = "1413-4853",
language = "en",
targetfile = "gouveia_assessment.pdf",
urlaccessdate = "21 maio 2024"
}