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Article

Space Surveillance with High-Frequency Radar

Defence Science and Technology Group, Edinburgh, SA 5111, Australia
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Author to whom correspondence should be addressed.
Sensors 2025, 25(7), 2302; https://doi.org/10.3390/s25072302
Submission received: 10 March 2025 / Revised: 29 March 2025 / Accepted: 3 April 2025 / Published: 4 April 2025
(This article belongs to the Special Issue Sensors for Space Situational Awareness and Object Tracking)

Abstract

High-Frequency (HF) radar is well suited to the surveillance of low-earth-orbit space. For large targets, a small deployable HF radar is able to match the detection performance of much larger space surveillance radar systems operating at higher frequencies. However, there are some unique challenges associated with the use of HF, including the range–Doppler coupling bias, coarse detection-level localisation, and the presence of meteor returns and other unwanted signals. This paper details the use of HF radar for space surveillance, including signal processing and radar product formation, tracking, ionospheric correction, and orbit determination. It is shown that by fusing measurements from multiple passes, accurate orbital estimates can be obtained. Included are results from recent SpaceFest trials of the Defence Science and Technology Group’s HF space surveillance radar, achieving real-time wide-area surveillance in tracking, orbit determination, and cueing of other space surveillance sensors.
Keywords: HF radar; bistatic radar; radar signal processing; space surveillance; orbit determination; space domain awareness HF radar; bistatic radar; radar signal processing; space surveillance; orbit determination; space domain awareness

Share and Cite

MDPI and ACS Style

Hennessy, B.; Yardley, H.; Debnam, R.; Camilleri, T.A.; Spencer, N.K.; Holdsworth, D.A.; Warne, G.; Cheung, B.; Kharabash, S. Space Surveillance with High-Frequency Radar. Sensors 2025, 25, 2302. https://doi.org/10.3390/s25072302

AMA Style

Hennessy B, Yardley H, Debnam R, Camilleri TA, Spencer NK, Holdsworth DA, Warne G, Cheung B, Kharabash S. Space Surveillance with High-Frequency Radar. Sensors. 2025; 25(7):2302. https://doi.org/10.3390/s25072302

Chicago/Turabian Style

Hennessy, Brendan, Heath Yardley, Rob Debnam, Tristan A. Camilleri, Nicholas K. Spencer, David A. Holdsworth, Goeff Warne, Brian Cheung, and Sergey Kharabash. 2025. "Space Surveillance with High-Frequency Radar" Sensors 25, no. 7: 2302. https://doi.org/10.3390/s25072302

APA Style

Hennessy, B., Yardley, H., Debnam, R., Camilleri, T. A., Spencer, N. K., Holdsworth, D. A., Warne, G., Cheung, B., & Kharabash, S. (2025). Space Surveillance with High-Frequency Radar. Sensors, 25(7), 2302. https://doi.org/10.3390/s25072302

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