|
Server : Apache/2.4.62 System : FreeBSD fbsdweb2.web.rcn.net 14.1-RELEASE FreeBSD 14.1-RELEASE releng/14.1-n267679-10e31f0946d8 GENERIC amd64 User : www ( 80) PHP Version : 8.3.8 Disable Function : NONE Directory : /domains/astrosfm/AAS_meetings/1997_astro/abstracts/ |
Upload File : |
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<TITLE>Abstract AAS 97-611</TITLE>
</HEAD>
<BODY BGCOLOR="ffffff">
<h2>AAS 97-611</h2>
<h2> RANGE LIMITS OF ATTITUDE DETERMINATION ACCURACY </h2>
<h4> D. Mortari - Universita degli Studi "La Sapienaz" di Roma, Italy </h4>
<h2> Abstract </h2>
This paper quantifies the error associated with the optimal attitude estimation based on vectors observation and identifies the limit conditions for the input unit-vectors which assure the attitude error be less than a given requested value. The error is originated by the observed vectors spatial distribution and accuracies. When n=2 vectors are available the attitude error is analytically evaluated and the "quasi-parallel limit condition" is defined. When n>2, some parameters indicating the error are shown. The paper then establishes which are the known optimal attitude estimation algorithms for which the approaching of a quasi-parallel limit condition can be detected. These parameters indicate the reliability of the attitude estimation and can be used, as weights, to improve the attitude estimation evaluated by statistical filtering.