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New Instrumentation at NTNU

The Norwegian University of Science and Technology (NTNU) has developed advanced instrumentation for studying gravity waves and momentum flux in the atmosphere. Featuring a 30 kW SkiyMet system, this setup operates near 35 MHz, allowing for high-accuracy measurements of horizontal winds, temperatures, and polar mesospheric clouds (PMC). Enhanced transmitter arrays enable precise beam forming for gravity wave momentum flux determination. Additionally, low-light-level all-sky imagers and specialized optical filters facilitate comprehensive observations of airglow and auroral structures, with potential for collaborative studies across radar systems.

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New Instrumentation at NTNU

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  1. New Instrumentation at NTNU P. J. Espy and R. E. Hibbins Norwegian University of Science and Technology Trondheim, Norway Background Picture from D. Fritts

  2. Meteor Radar with Momentum Flux Capabilities • 30 kW SkiyMet system operating near 35 MHz • Standard horizontal winds, temperatures and PMC • Enhanced transmitter array to allow beam forming • Allows gravity wave momentum flux determination

  3. Standard wind obs

  4. Transmitted Power Profile

  5. Low-Light-Level All Sky Imager + OH Spectrometer • TE-cooledCCD camera • All sky optics • Filter wheel • Filters: • OH 720-910 nm with O2 notch @ 865 nm • Na 589 nm, 0.2 nm FWHM • N2+ 1NG 428 nm, 2 nm FWHM • OI 630 nm, 2 nm FWHM • H 485.8 nm, 1.6 nm FWHM • 1 Guest Investigator filter. • OH Spectrometer 1500-1700 nm, 2nm res.

  6. 100 km Zenith over Alomar

  7. TMA Release from Andøya viewed from Trondheim

  8. 22 Feb 2011 OH Temperatures

  9. Possible Collaborative Studies: Imager • Triangulation of airglow structures for 3-D studies • Triangulation of auroral structures for 3-D studies • Proton content of aurora over and equatorward of Andøya • Characteristic energy of precipitating electrons in aurora over and equatorward of Andøya • Comparison of optical vs. radar momentum flux observation • Validation of new tool for momentum flux observations at Andøya

  10. Possible Collaborative Studies: Radar • Current radars (Andøya, NTNU, Kiruna) affected by orographic, auroral and polar vortex shear zone sources. • Andøya vs Kiruna radar • Same sides of the polar vortex and auroral oval, but different sides of the mountains. • NTNU vs Andøya radar • On same side of the mountains but opposite sides of polar vortex and auroral oval • NTNU vs Kiruna radar • Different sides of the mountains, polar vortex and auroral oval • Comparing this triad as a function of polar vortex, auroral and ground-level wind strength and orientation will allow the different sources to be quantified. • Use correlation of NTNU-Andøya-Kiruna radars to extend the climatology of gravity waves to horizontal scales beyond 200 km.

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