Design of Regional Coverage Low Earth Orbit (LEO) Constellation with Optimal Inclination

Jinyoung Shin, Sang Young Park, Jihae Son, Sung Chan Song

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, we describe an analytical process for designing a low Earth orbit constellation for discontinuous regional coverage, to be used for a surveillance and reconnaissance space mission. The objective of this study was to configurea satellite constellation that targeted multiple areas near the Korean Peninsula. The constellation design forms part of adiscontinuous regional coverage problem with a minimum revisit time. We first introduced an optimal inclination searchalgorithm to calculate the orbital inclination that maximizes the geometrical coverage of single or multiple ground targets. Thecommon ground track (CGT) constellation pattern with a repeating period of one nodal day was then used to construct therest of the orbital elements of the constellation. Combining these results, we present an analytical design process that userscan directly apply to their own situation. For Seoul, for example, 39.0° was determined as the optimal orbital inclination, andthe maximum and average revisit times were 58.1 min and 27.9 min for a 20-satellite constellation, and 42.5 min and 19.7 minfor a 30-satellite CGT constellation, respectively. This study also compares the revisit times of the proposed method with thoseof a traditional Walker-Delta constellation under three inclination conditions: optimal inclination, restricted inclination bylaunch trajectories from the Korean Peninsula, and inclination for the sun-synchronous orbit. A comparison showed that theCGT constellation had the shortest revisit times with a non-optimal inclination condition. The results of this analysis can serveas a reference for determining the appropriate constellation pattern for a given inclination condition

Original languageEnglish
Pages (from-to)217-227
Number of pages11
JournalJournal of Astronomy and Space Sciences
Volume38
Issue number4
DOIs
Publication statusPublished - 2021

Bibliographical note

Funding Information:
This work was supported by Hanwha Systems Co., Ltd. with the research project of “Micro-Satellite System and Satellite Constellation Research.”

Publisher Copyright:
© The Korean Space Science Society

All Science Journal Classification (ASJC) codes

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

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