A Balloon-Borne Very Long Baseline Interferometry Experiment in the Stratosphere: Systems Design and Developments. (arXiv:1812.04255v1 [astro-ph.IM])

A Balloon-Borne Very Long Baseline Interferometry Experiment in the Stratosphere: Systems Design and Developments. (arXiv:1812.04255v1 [astro-ph.IM])
<a href="http://arxiv.org/find/astro-ph/1/au:+Doi_A/0/1/0/all/0/1">Akihiro Doi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kono_Y/0/1/0/all/0/1">Yusuke Kono</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kimura_K/0/1/0/all/0/1">Kimihiro Kimura</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nakahara_S/0/1/0/all/0/1">Satomi Nakahara</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Oyama_T/0/1/0/all/0/1">Tomoaki Oyama</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Okada_N/0/1/0/all/0/1">Nozomi Okada</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Satou_Y/0/1/0/all/0/1">Yasutaka Satou</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yamashita_K/0/1/0/all/0/1">Kazuyoshi Yamashita</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Matsumoto_N/0/1/0/all/0/1">Naoko Matsumoto</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Baba_M/0/1/0/all/0/1">Mitsuhisa Baba</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yasuda_D/0/1/0/all/0/1">Daisuke Yasuda</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Suzuki_S/0/1/0/all/0/1">Shunsaku Suzuki</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hasegawa_Y/0/1/0/all/0/1">Yutaka Hasegawa</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Honma_M/0/1/0/all/0/1">Mareki Honma</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tanaka_H/0/1/0/all/0/1">Hiroaki Tanaka</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ishimura_K/0/1/0/all/0/1">Kosei Ishimura</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Murata_Y/0/1/0/all/0/1">Yasuhiro Murata</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Shimomukai_R/0/1/0/all/0/1">Reiho Shimomukai</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tachi_T/0/1/0/all/0/1">Tomohiro Tachi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Saito_K/0/1/0/all/0/1">Kazuya Saito</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Watanabe_N/0/1/0/all/0/1">Naohiko Watanabe</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bando_N/0/1/0/all/0/1">Nobutaka Bando</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kameya_O/0/1/0/all/0/1">Osamu Kameya</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yonekura_Y/0/1/0/all/0/1">Yoshinori Yonekura</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sekido_M/0/1/0/all/0/1">Mamoru Sekido</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Inoue_Y/0/1/0/all/0/1">Yoshiyuki Inoue</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sakamoto_H/0/1/0/all/0/1">Hikaru Sakamoto</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kogiso_N/0/1/0/all/0/1">Nozomu Kogiso</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Shoji_Y/0/1/0/all/0/1">Yasuhiro Shoji</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ogawa_H/0/1/0/all/0/1">Hideo Ogawa</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fujisawa_K/0/1/0/all/0/1">Kenta Fujisawa</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Narita_M/0/1/0/all/0/1">Masanao Narita</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Shibai_H/0/1/0/all/0/1">Hiroshi Shibai</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fuke_H/0/1/0/all/0/1">Hideyuki Fuke</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ueharai_K/0/1/0/all/0/1">Kenta Ueharai</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Koyama_S/0/1/0/all/0/1">Shoko Koyama</a>

The balloon-borne very long baseline interferometry (VLBI) experiment is a
technical feasibility study for performing radio interferometry in the
stratosphere. The flight model has been developed. A balloon-borne VLBI station
will be launched to establish interferometric fringes with ground-based VLBI
stations distributed over the Japanese islands at an observing frequency of
approximately 20 GHz as the first step. This paper describes the system design
and development of a series of observing instruments and bus systems. In
addition to the advantages of avoiding the atmospheric effects of absorption
and fluctuation in high frequency radio observation, the mobility of a station
can improve the sampling coverage (`uv-coverage’) by increasing the number of
baselines by the number of ground-based counterparts for each observation day.
This benefit cannot be obtained with conventional arrays that solely comprise
ground-based stations. The balloon-borne VLBI can contribute to a future
progress of research fields such as black holes by direct imaging.

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