Ice thickness along 750 km traverse route from Kohnen Station to JASE Meeting Point, Antarctica, based on JASE ground-based radar surveys

This dataset contains the ice thickness data recorded by ground-based radio echo sounding experiment carried out along a traverse route from Wasa Station in East Antarctica to the JASE Meeting point. The data were recorded in the joint Japanese-Swedish JASE traverse survey by NIPR (the 48th and 49th Japanese Antarctic Research Expedition (JARE48 and JARE49)) and Stockholm University. PIs of the joint survey are Shuji Fujita (NIPR, Japan) and Per Holmlund (Stockholm University, Sweden). This data is for Swedish team's way-in to the meeting point. They used a pulse-modulated VHF radar sounder with a peak transmission power of 1 kW, a center frequency of 179 MHz and a transmitter pulse width of 250 ns. Position of sites are not accurate enough because of GPS problems. Nevertheless, we publish this set of data because the data are very precious in this region of Antarctica. In future, when more data with accurate positioning data are produced, this set of data should be replaced by newer and more reliable data in terms of positioning. We infer that largest positioning error is of the order of 1 km along this part of the traverse. Possible clock errors between GPS and radar are given in the dataset. Fujita et al. (2011) and Fujita et al. (2012) are the original papers for the data. In 2021, the data were validated and corrected (Tsutaki et al. 2022, TC paper).

本数据集包含通过地面无线电回波探测（ground-based radio echo sounding）实验记录的冰厚数据，该实验沿东南极洲瓦萨站至JASE汇合点的横穿路线开展。这些数据由日本国立极地研究所（National Institute of Polar Research，NIPR，第48、49次日本南极考察队，即JARE48与JARE49）与斯德哥尔摩大学在日瑞联合JASE横穿考察中记录。该联合考察的项目负责人（Principal Investigator，PI）为藤田修二（日本NIPR）与佩尔·霍尔姆伦德（瑞典斯德哥尔摩大学）。本数据集记录了瑞典队前往汇合点途中的冰厚数据。他们使用了一台脉冲调制甚高频（Very High Frequency，VHF）雷达测深仪，其峰值发射功率为1千瓦，中心频率为179兆赫兹，发射脉冲宽度为250纳秒。由于GPS问题，测点位置精度不足。尽管如此，鉴于该数据在南极这一区域的珍贵性，我们仍将其公开。未来，若获得具有精确位置信息的更多数据，本数据集应被定位更可靠的新数据取代。我们推测，该横穿路段的最大定位误差约为1公里。数据集中提供了GPS与雷达之间可能存在的时钟误差。藤田等人（2011）及藤田等人（2012）的论文为该数据的原始出处。2021年，该数据经验证与校正（Tsutaki等人，2022，TC论文）。