Paper Info
Title
Performance Evaluation and Requirements Assessment for Gravity Gradient Referenced Navigation
Abstract
In this study, simulation tests for gravity gradient referenced navigation (GGRN) are conducted to verify the effects of various factors such as database (DB) and sensor errors, flight altitude, DB resolution, initial errors, and measurement update rates on the navigation performance. Based on the simulation results, requirements for GGRN are established for position determination with certain target accuracies. It is found that DB and sensor errors and flight altitude have strong effects on the navigation performance. In particular, a DB and sensor with accuracies of 0.1 E and 0.01 E, respectively, are required to determine the position more accurately than or at a level similar to the navigation performance of terrain referenced navigation (TRN). In most cases, the horizontal position error of GGRN is less than 100 m. However, the navigation performance of GGRN is similar to or worse than that of a pure inertial navigation system when the DB and sensor errors are 3 E or 5 E each and the flight altitude is 3000 m. Considering that the accuracy of currently available gradiometers is about 3 E or 5 E, GGRN does not show much advantage over TRN at present. However, GGRN is expected to exhibit much better performance in the near future when accurate DBs and gravity gradiometer are available.
Year
DOI
Venue
2015
10.3390/s150716833
SENSORS
Keywords
DocType
Volume
gravity gradient,GGRN,EKF,requirements analysis
Journal
15
Issue
ISSN
Citations 
7.0
1424-8220
8
PageRank 
References 
Authors
1.09
0
3
Name
Order
Citations
PageRank
Jisun Lee1212.39
jay kwon293.07
Myeong-Jong Yu3253.04