Low-frequency observations using high-altitude balloon experiments (LOBE)

Raj Thilak Rajan, Prem Sundaramoorthy, C Vertegaal, Anton Montage, Visweswaran Karunanithi, Maneesh Verma, M.J. Bentum, Chris Verhoeven

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

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The frequency range below 30 MHz remains one of the last unexplored frequency ranges in radio astronomy However, Earth-based observations at these wavelengths are severely impeded, due to man-made radio frequency interference (RFI) and atmospheric opacity. To overcome this impediment, various space-based radio astronomy studies have been proposed in the past decade, notably the OLFAR (Orbiting low Frequency Antennas for Radio Astronomy) study, which proposed a satellite swarm for ultra-long wavelength observation. To realize this mission, various technological
challenges of a satellite swarm are currently being addressed, particularly antenna design, navigation, communication, distributed processing, and overall system and mission design. Secondly, the RFI levels at various altitudes from Earth is currently unknown, which is a hindrance in general for radio astronomy. To this end, we propose the use of highaltitude ballooning experiments to validate OLFAR sub-systems in pseudo-representative conditions. Furthermore, these ballooning experiments will measure the RFI in the ultra-long wavelength spectrum at various altitudes from Earth. Our project is termed LOBE (Low-frequency observations using high-altitude Balloon Experiments), and in this paper, we present an overview of the science objectives, payload, and the technological and programmatic
challenges of the LOBE project
Original languageEnglish
Title of host publication70th International Astronautical Congress (IAC)
PublisherInternational Astronautical Federation
Number of pages6
Publication statusPublished - 1 Oct 2019
Event70th International Astronautical Congress - Walter E. Washington Convention Center, Washington D.C., United States
Duration: 21 Oct 201925 Oct 2019


Conference70th International Astronautical Congress
Abbreviated titleIAC
Country/TerritoryUnited States
CityWashington D.C.
Internet address


  • Array of balloons
  • High-altitude balloons
  • Satellite swarms
  • Space-based radio astronomy
  • Ultra-long wavelength observation


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