Polar Patrol Balloon (PPB) experiment of the 30th Japanese Antarctic Research Expedition (1989-1990)
The 30th Japanese Antarctic Research Expedition (JARE-30) performed a Polar Patrol Balloon (PPB) experiment in January 1990. The launching date was January 5th. We could obtain position data until February 2nd and house keeping data until February 7th through ARGOS system. The trajectory of the PPB...
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National Institute of Polar Research
1991
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ftdoajarticles:oai:doaj.org/article:d2bcf91d9c674d718f2a7e8a27efd498 2023-05-15T13:57:55+02:00 Polar Patrol Balloon (PPB) experiment of the 30th Japanese Antarctic Research Expedition (1989-1990) Akira Kadokura Masaki Ejiri Shigeo Ohta Hiromitsu Akiyama 1991-07-01T00:00:00Z https://doi.org/10.15094/00008723 https://doaj.org/article/d2bcf91d9c674d718f2a7e8a27efd498 EN JA eng jpn National Institute of Polar Research http://doi.org/10.15094/00008723 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00008723 0085-7289 2432-079X https://doaj.org/article/d2bcf91d9c674d718f2a7e8a27efd498 Antarctic Record, Vol 35, Iss 2, Pp 143-154 (1991) Geography (General) G1-922 article 1991 ftdoajarticles https://doi.org/10.15094/00008723 2022-12-31T06:16:55Z The 30th Japanese Antarctic Research Expedition (JARE-30) performed a Polar Patrol Balloon (PPB) experiment in January 1990. The launching date was January 5th. We could obtain position data until February 2nd and house keeping data until February 7th through ARGOS system. The trajectory of the PPB was about seven-eighth of a perfect circumpolar one. Auto-ballast system was normally operated to keep the flight level above 27km until 15 days after launch when all the ballast had been consumed, and then the balloon height became lower and lower. Before the ballast was completely consumed, the balloon drifted westward with a constant speed of about 18.7°per day by an easterly wind. After that the drifting speed gradually slowed down, eventually became zero on January 25th. On January 29th the balloon started drifting eastward. We calculated solar zenith angle and sunset angle at balloon height and found that the increase of ballast consumption began at the time when the maximum solar zenith angle became greater than a critical angle, in our case 92.4°. In order to understand the balloon drifting motion we referred to height profile data of zonal wind at Syowa Station during our flight. It was shown that when the balloon changed its drifting direction, the zonal wind direction was westerly at the balloon height. Article in Journal/Newspaper Antarc* Antarctic Directory of Open Access Journals: DOAJ Articles Antarctic Syowa Station |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Japanese |
topic |
Geography (General) G1-922 |
spellingShingle |
Geography (General) G1-922 Akira Kadokura Masaki Ejiri Shigeo Ohta Hiromitsu Akiyama Polar Patrol Balloon (PPB) experiment of the 30th Japanese Antarctic Research Expedition (1989-1990) |
topic_facet |
Geography (General) G1-922 |
description |
The 30th Japanese Antarctic Research Expedition (JARE-30) performed a Polar Patrol Balloon (PPB) experiment in January 1990. The launching date was January 5th. We could obtain position data until February 2nd and house keeping data until February 7th through ARGOS system. The trajectory of the PPB was about seven-eighth of a perfect circumpolar one. Auto-ballast system was normally operated to keep the flight level above 27km until 15 days after launch when all the ballast had been consumed, and then the balloon height became lower and lower. Before the ballast was completely consumed, the balloon drifted westward with a constant speed of about 18.7°per day by an easterly wind. After that the drifting speed gradually slowed down, eventually became zero on January 25th. On January 29th the balloon started drifting eastward. We calculated solar zenith angle and sunset angle at balloon height and found that the increase of ballast consumption began at the time when the maximum solar zenith angle became greater than a critical angle, in our case 92.4°. In order to understand the balloon drifting motion we referred to height profile data of zonal wind at Syowa Station during our flight. It was shown that when the balloon changed its drifting direction, the zonal wind direction was westerly at the balloon height. |
format |
Article in Journal/Newspaper |
author |
Akira Kadokura Masaki Ejiri Shigeo Ohta Hiromitsu Akiyama |
author_facet |
Akira Kadokura Masaki Ejiri Shigeo Ohta Hiromitsu Akiyama |
author_sort |
Akira Kadokura |
title |
Polar Patrol Balloon (PPB) experiment of the 30th Japanese Antarctic Research Expedition (1989-1990) |
title_short |
Polar Patrol Balloon (PPB) experiment of the 30th Japanese Antarctic Research Expedition (1989-1990) |
title_full |
Polar Patrol Balloon (PPB) experiment of the 30th Japanese Antarctic Research Expedition (1989-1990) |
title_fullStr |
Polar Patrol Balloon (PPB) experiment of the 30th Japanese Antarctic Research Expedition (1989-1990) |
title_full_unstemmed |
Polar Patrol Balloon (PPB) experiment of the 30th Japanese Antarctic Research Expedition (1989-1990) |
title_sort |
polar patrol balloon (ppb) experiment of the 30th japanese antarctic research expedition (1989-1990) |
publisher |
National Institute of Polar Research |
publishDate |
1991 |
url |
https://doi.org/10.15094/00008723 https://doaj.org/article/d2bcf91d9c674d718f2a7e8a27efd498 |
geographic |
Antarctic Syowa Station |
geographic_facet |
Antarctic Syowa Station |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Antarctic Record, Vol 35, Iss 2, Pp 143-154 (1991) |
op_relation |
http://doi.org/10.15094/00008723 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00008723 0085-7289 2432-079X https://doaj.org/article/d2bcf91d9c674d718f2a7e8a27efd498 |
op_doi |
https://doi.org/10.15094/00008723 |
_version_ |
1766265865429319680 |