Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Attitude Reconstruction from Inertial Measurements: QuatFIter and Its
  Comparison with RodFIter   RodFIter is a promising method of attitude reconstruction from inertial
measurements based on the functional iterative integration of Rodrigues vector.
The Rodrigues vector is used to encode the attitude in place of the popular
rotation vector because it has a polynomial-like rate equation and could be
cast into theoretically sound and exact integration. This paper further applies
the approach of RodFIter to the unity-norm quaternion for attitude
reconstruction, named QuatFIter, and shows that it is identical to the previous
Picard-type quaternion method. The Chebyshev polynomial approximation and
truncation techniques from the RodFIter are exploited to speed up its
implementation. Numerical results demonstrate that the QuatFIter is comparable
in accuracy to the RodFIter, although its convergence rate is relatively slower
with respect to the number of iterations. Notably, the QuatFIter has about two
times better computational efficiency, thanks to the linear quaternion
kinematic equation.

22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys