Journal of Aerospace Science and Technology

Journal of Aerospace Science and Technology

Designing a Hybrid GEO-LEO Constellation Pattern for Regional Satellite Navigation in Iran

Document Type : Original Article

Authors
Shahrokh Zohrabzadeh Bozorgi
Abolghasem Naghash
Amirkabir University of Technology
10.22034/jast.2022.362842.1132
Abstract
In this paper, a few hybrid satellite constellations including combinations of LEO and GEO satellites for providing satellite navigation and positioning services for users in Iran have been designed and proposed. The performance of the constellations has been analyzed based on DOP values variations. It is shown that theoretically, it is possible to provide satellite positioning and navigation service with acceptable DOP values based on the introduced hybrid pattern including three GEO satellites and a constellation of about 30 to 60 LEO satellites in 3 or 4 orbit planes. The design has been performed based on studying the skyplot of the Iranian territory considering the GEO satellites as fixed points, and then determining the effect of the instantaneous position of the LEO satellites on the DOP values. A few LEO constellations have been designed to provide best DOP values based on the skyplot analysis results. Then, scenarios including similar GEO satellites and different patterns for LEO satellites have been simulated for half a sidereal day. The performance of the hybrid constellations provides satisfactory results with the average PDOP values of less than 4 which is acceptable. Optimizing the resulted pattern can lead to more desirable performance. In addition to navigation mission, hybrid constellations can perform other missions. Therefore, the proposed constellations can be operated as multi-mission space platforms.
Keywords
Simulation
Coverage analysis
DOP
Skyplot
Iran

Subjects

[1]   E.D. Kaplan, J.H. Christopher, Understanding GPS/GNSS, Principles and Applications, Third edition, Artech House Press, 2017.
[2]   W.B. Parkinson, J.J. Spilker, Global Positioning System: Theory and Applications, vols. I and II, Institute of Aeronautics and Astronautics Inc, Washington, 1996.
[3]   Official website of Indian Research Organization (ISIRO) - https://www.isro.gov.in/irnss-programme
[4]   Official website of QZSS -  https://qzss.go.jp/en/overview/services/sv01_what.html
[5]   S. Zohrabzadeh, A Naghash, “ Evaluating the Dilution of Precision of the Indian Regional Navigation Satellite System for the Users in the Iranian Territory”, In  18th Int. Conference of Iranian Aerospace Society, Amirkabir University of Technology- February 2020
[6]   Choi B-K, Roh K-M, Ge H, Ge M, Joo J-M, Heo MB. Performance Analysis of the Korean Positioning System Using Observation Simulation. Remote Sensing. 2020; 12(20):3365.
[7]   Choi, M., D. Won, Jongsun Ahn, Sang-Kyoung Sung, J. Lee, Jeongrae Kim, Jaegyu Jang and Y. Lee. “Conceptual Satellite Orbit Design for Korean Navigation Satellite System.” Transactions of The Japan Society for Aeronautical and Space Sciences 61 (2018): 12-20.
[8]   Reid, T. G., Neish, A. M., Walter, T. F., & Enge, P. K. (2016). Leveraging Commercial Broadband LEO Constellations for Navigation. Proceedings of the 29th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS+ 2016), (pp. 2300 - 2314). Portland, Oregon.
[9] Ge, H., Li, B., Ge, M., Zang, N., Nie, L., Shen, Y., Schuh, H. (2018). Initial Assessment of Precise Point Positioning with LEO Enhanced Global Navigation Satellite Systems (LeGNSS). Remote sensing, 10(7), 984.
[10] Ge, H., Li, B., Nie, L., Ge, M., & Schuh, H. (2020). LEO constellation optimization for Leo enhanced Global Navigation Satellite System (LeGNSS). Advances in Space Research, Volume 66, Issue 3, Pages 520-532.
[11] Han, Y., Wang, L., Fu, W., Zhou, H., Li, T., Xu, B.,Chen, R. (2020). LEO navigation augmentation constellation design with the multi-objective optimization approaches. Chinese Journal of Aeronautics.
[12] Keyvani, F., & Torabi, S. (2019). Design and Simulation of Regional Navigation Constellation with Optimized Mean DOP based on Hybrid GEO and IGSO Satellites. International Journal of Aviation, Aeronautics, and Aerospace, Volume 6, Issue 2, Article 2.
[13] Asgarimehr, M., & Hossainali, M. (2014). Optimization of geosynchronous satellite constellation for independent regional navigation and positioning in Middle East region. ActaAstronautica(104), 147-158.
[14] Zohrabzadeh, S. Naghash, A. “A Hybrid Constellation Pattern for a Regional Satellite Navigation System for Iran”, In 19th Int. Conference of Iranian Aerospace Society, Tehran, 2021.
[15] Anonymous author, US Department of Defense, “Global Positioning System Standard, Positioning Service Performance Standard.,” 2020.
[16] J. R. Wertz, “Orbit and Constellation Design and Management”, Microcosm, Inc, 2001.
[17]         A. Chobotov, “Orbital Mechanics”, Third Edition (AIAA Education Series) 3rd Edition.
Journal of Aerospace Science and Technology
Volume 16, Issue 1
April 2023
Pages 77-87

  • Receive Date 24 September 2022
  • Revise Date 05 November 2022
  • Accept Date 05 November 2022
  • First Publish Date 05 November 2022