Precision Free-Inertial Navigation with Gravity Compensation by an Onboard Gradiometer

2006 ◽  
Vol 29 (3) ◽  
pp. 704-713 ◽  
Author(s):  
Christopher Jekeli
Keyword(s):  
Inertial Navigation ◽  
Gravity Compensation

Gravity Requirements for Compensation of Ultra-Precise Inertial Navigation

2005 ◽  
Vol 58 (3) ◽  
pp. 479-492 ◽  
Author(s):  
Jay Hyoun Kwon ◽  
Christopher Jekeli
Keyword(s):  
Inertial Sensors ◽  
Interpolation Method ◽  
Gravity Data ◽  
Inertial Navigation ◽  
Navigation Systems ◽  
Gravity Compensation ◽  
Global Gravity ◽  
Navigation Error ◽  
Global Gravity Model

Precision inertial navigation depends not only on the quality of the inertial sensors (accelerometers and gyros), but also on the accuracy of the gravity compensation. With a view toward the next-generation inertial navigation systems, based on sensors whose errors contribute as little as a few metres per hour to the navigation error budget, we have analyzed the required quality of gravity compensation to the navigation solution. The investigation considered a standard compensation method using ground data to predict the gravity vector at altitude for aircraft free-inertial navigation. The navigation effects of the compensation errors were examined using gravity data in two gravimetrically distinct areas and a navigation simulator with parameters such as data noise and resolution, supplemental global gravity model noise, and on-track interpolation method. For a typical flight trajectory at 5 km altitude and 300 km/hr aircraft speed, the error in gravity compensation contributes less than 5 m to the position error after one hour of free-inertial navigation if the ground data are gridded with 2 arcmin resolution and are accurate to better than 5 mGal.

scholarly journals Gravity Compensation Using EGM2008 for High-Precision Long-Term Inertial Navigation Systems

Sensors ◽  
2016 ◽  
Vol 16 (12) ◽  
pp. 2177 ◽  
Author(s):  
Ruonan Wu ◽  
Qiuping Wu ◽  
Fengtian Han ◽  
Tianyi Liu ◽  
Peida Hu ◽  
...  
Keyword(s):  
High Precision ◽  
Inertial Navigation ◽  
Navigation Systems ◽  
Gravity Compensation ◽  
Inertial Navigation Systems
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