Browsing by Author "Hanany, Shaul"

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    Balloon-borne Imaging of Polar Mesospheric Clouds
    (2018-08) Angulo-Umaña, Pedro; Hanany, Shaul; Geach, Christopher
    Polar Mesospheric Clouds, or PMCs, are the highest forming clouds observed on Earth, forming about 80 kilometers above the polar surfaces during local summers. Due to their height, they are difficult to observe from either ground or space. In early 2013, EBEX, a balloon-borne cosmological experiment that flew over Antarctica for 11 days, serendipitously observed PMCs using its onboard star cameras. Because of the proximity of EBEX to the PMCs, and the high resolution of the star cameras, the captured images had an unprecedentedly small spatial resolution. However, the captured images also contained undesirable artifacts, such as dust spots, image gradients, and other similar pathologies. Several post-hoc techniques were developed to remedy these problems and restore the images.
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    Data for the published paper "Picosecond laser ablation of millimeter-wave subwavelength structures on alumina and sapphire"
    (2021-07-26) Wen, Qi; Fadeeva, Elena; Hanany, Shaul; Koch, Jürgen; Matsumura, Tomotake; Takaku, Ryota; Young, Karl; wenxx181@umn.edu; Wen, Qi; University of Minnesota Hanany Cosmolab
    Data needed to reproduce Figure 2, 3, 5, 6, 8, 11 in the Wen et al. 2021 paper.
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    Supplementary data for "The PMC Turbo balloon mission to measure gravity waves and turbulence in Polar Mesospheric Clouds: Camera, telemetry, and software performance"
    (2020-06-17) Kjellstrand, Carl B; Jones, Glenn; Geach, Christopher P; Williams, Bifford P; Fritts, David C; Miller, Amber D; Hanany, Shaul; Limon, Michele; Reimuller, Jason; geach003@umn.edu; Geach, Christopher P; School of Physics and Astronomy, Hanany - Observational Cosmology Lab
    The Polar Mesospheric Cloud Turbulence (PMC Turbo) instrument consists of a balloon-borne platform which hosts seven cameras and a Rayleigh lidar. During a six-day flight in July 2018, the cameras captured images of Polar Mesospheric Clouds (PMCs) with a sensitivity to spatial scales from ~20 m to 100 km at a ~2-s cadence and a full field of view (FOV) of hundreds of kilometers. We developed software optimized for imaging of PMCs, controlling multiple independent cameras, compressing and storing images, and for choosing telemetry communication channels. We give an overview of the PMC Turbo design focusing on the flight software and telemetry functions. We describe the performance of the system during its first flight in July 2018. The images uploaded here support the paper in demonstrating the performance of the PMC Turbo instrument.
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    Supplementary data for "Trajectories of long duration balloons launched from McMurdo Station in Antarctica"
    (2020-10-23) Geach, Christopher; Hanany, Shaul; Tan, Chiou Yang; Tan, Xin Zhi; geach003@umn.edu; Geach, Christopher; School of Physics and Astronomy, Hanany - Observational Cosmology Lab
    These files contain trajectory information for long-duration balloons launched from McMurdo Station in Antarctica. These balloons carry payloads addressing a wide range of scientific questions. We have analyzed these trajectories in order to estimate the expected range of trajectories to aid in mission planning for future balloon experiments from McMurdo.