Accelerometer-Derived Atmospheric Density from the CHAMP and GRACE Satellites. Version 2.3

2011 ◽  
Author(s):  
Eric K. Sutton
Keyword(s):  
Atmospheric Density ◽  
Grace Satellites

Precision Low Earth Orbit Determination Using Atmospheric Density Calibration

1998 ◽  
Vol 46 (4) ◽  
pp. 395-409 ◽  
Author(s):  
F. A. Marcos ◽  
M. J. Rendra ◽  
J. M. Griffin ◽  
J. N. Bass ◽  
D. R. Larson ◽  
...  
Keyword(s):  
Orbit Determination ◽  
Low Earth Orbit ◽  
Earth Orbit ◽  
Atmospheric Density

scholarly journals Magnetometer data from the GRACE satellite duo

2021 ◽  
Vol 73 (1) ◽  
Author(s):  
Nils Olsen
Keyword(s):  
Mean Squared Error ◽  
Incident Angle ◽  
Magnetic Data ◽  
Grace Data ◽  
Magnetometer Data ◽  
Geophysical Investigations ◽  
Grace Satellites ◽  
Grace Satellite ◽  
The Difference ◽  
Grace Mission

AbstractThis paper describes and discusses the preprocessing and calibration of the magnetic data taken by the navigational magnetometers onboard the two GRACE satellites, with focus on the almost 10 years period from January 2008 to the end of the GRACE mission in October 2017 for which 1-Hz magnetic data are available. A calibration of the magnetic data is performed by comparing the raw magnetometer sensor readings with model magnetic vector values as provided by the CHAOS-7 geomagnetic field model for the time and position of the GRACE data. The presented approach also accounts for magnetic disturbances produced by the satellite’s magnetorquer and for temperature effects, which are parametrized by the Sun incident angle. The root-mean-squared error of the difference between the calibrated data and CHAOS-7 model values is about 10 nT, which makes the GRACE magnetometer data relevant for geophysical investigations.

scholarly journals An origin of the variations of astronomical refraction

1979 ◽  
Vol 89 ◽  
pp. 27-33
Author(s):  
Haruo Yasuda ◽  
Rikinosuke Fukaya
Keyword(s):  
Surface Layer ◽  
Correction Term ◽  
Empirical Relation ◽  
Scale Height ◽  
Atmospheric Density ◽  
Analytical Expression ◽  
Temperature And Pressure ◽  
Astronomical Refraction

There exists an empirical relation between the anomalous refraction and the atmospheric density in the surface layer. From the relations the variations of scale height for each night can be determined by the temperature and pressure in the surface layer. A correction term to the refraction table is derived in an analytical expression.

scholarly journals Grace Signal Filtering as a Means of Determining Equivalent Water Thickness in Poland

2012 ◽  
Vol 19 (1) ◽  
Author(s):  
Monika Biryło ◽  
Jolanta Nastula
Keyword(s):  
Amplitude Ratio ◽  
Raw Data ◽  
Signal Filtering ◽  
Filtering Algorithm ◽  
Equivalent Water Thickness ◽  
Grace Satellites ◽  
Gravity Variations ◽  
Gravity Recovery

AbstractIn the paper an Equivalent Water Thickness (EWT) determination as a way of observing gravity variations is described. Since raw data acquired directly from Gravity Recovery and Climate Experiment - GRACE satellites is unsuitable for analysis due to stripes occurrence, a filtering algorithm must be used. In this paper, authors are testing two isotropic (Gauss, CNES/GRGS) filters and two anisotropic filters (Wiener- -Kolomogorov, ANS). Correlation, amplitude ratio, and modification were determined as well as maps were generated.

scholarly journals New Measurement of the Vertical Atmospheric Density Profile from Occultations of the Crab Nebula with X-Ray Astronomy Satellites Suzaku and Hitomi

2020 ◽  
Author(s):  
Satoru Katsuda ◽  
Hitoshi Fujiwara ◽  
Yoshitaka Ishisaki ◽  
Yoshitomo Maeda ◽  
Koji Mori ◽  
...  
Keyword(s):  
Density Profile ◽  
Crab Nebula ◽  
Atmospheric Density ◽  
X Ray ◽  
The Crab Nebula
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