Laser-based Relative Navigation Using GPS Measurements for Spacecraft Formation Flying

Kwangwon Lee, Hyungjik Oh, Han Earl Park, Sang Young Park, Chandeok Park

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

This study presents a precise relative navigation algorithm using both laser and Global Positioning System (GPS) measurements in real time. The measurement model of the navigation algorithm between two spacecraft is comprised of relative distances measured by laser instruments and single differences of GPS pseudo-range measurements in spherical coordinates. Based on the measurement model, the Extended Kalman Filter (EKF) is applied to smooth the pseudo-range measurements and to obtain the relative navigation solution. While the navigation algorithm using only laser measurements might become inaccurate because of the limited accuracy of spacecraft attitude estimation when the distance between spacecraft is rather large, the proposed approach is able to provide an accurate solution even in such cases by employing the smoothed GPS pseudo-range measurements. Numerical simulations demonstrate that the errors of the proposed algorithm are reduced by more than about 12% compared to those of an algorithm using only laser measurements, as the accuracy of angular measurements is greater than 0.001° at relative distances greater than 30 km.

Original languageEnglish
Pages (from-to)387-393
Number of pages7
JournalJournal of Astronomy and Space Sciences
Volume32
Issue number4
DOIs
Publication statusPublished - 2015

Bibliographical note

Funding Information:
This study has been carried out as a part of the programs at the Global Surveillance Research Center with the assistance of the Defense Acquisition Program Administration and the Agency for Defense Development

Publisher Copyright:
© This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Earth and Planetary Sciences(all)

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