HF Propagation Results From The Metal Oxide Space Cloud (MOSC) Experiment

Dev Joshi*, Keith Groves, William McNeil, Charles Carrano, Ronald Caton, R Todd Parris, Todd Pedersen, P.S. Cannon, Matthew Angling, Natasha Jackson-Booth

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
373 Downloads (Pure)


With support from the NASA sounding rocket program, the Air Force Research Laboratory launched two sounding rockets in the Kwajalein Atoll, Marshall Islands in May 2013 known as the Metal Oxide Space Cloud experiment. The rockets released samarium metal vapor at preselected altitudes in the lower F region that ionized forming a plasma cloud. Data from Advanced Research Project Agency Long-range Tracking and Identification Radar incoherent scatter radar and high-frequency (HF) radio links have been analyzed to understand the impacts of the artificial ionization on radio wave propagation. The HF radio wave ray-tracing toolbox PHaRLAP along with ionospheric models constrained by electron density profiles measured with the ALTAIR radar have been used to successfully model the effects of the cloud on HF propagation. Up to three new propagation paths were created by the artificial plasma injections. Observations and modeling confirm that the small amounts of ionized material injected in the lower F region resulted in significant changes to the natural HF propagation environment.
Original languageEnglish
Pages (from-to)710-722
Number of pages13
JournalRadio Science
Issue number6
Early online date25 Apr 2017
Publication statusPublished - Jun 2017


  • Metal Oxide Space Cloud Experiment
  • High Frequency Propagation Results
  • Successful modeling of HF results by ray-tracing


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