Processed airborne radio-echo sounding data from the AGAP survey covering Antarctica's Gamburtsev Province, East Antarctica (2007/2009)

An airborne radar survey was flown as part of the seven nation Antarctica's Gamburtsev Province (AGAP) expedition over the Gamburtsev Subglacial Mountains, Dome A, and the interior of East Antarctica during the International Polar Year 2007-2009. Operating from field camps located on either side of Dome A (namely AGAP-N and AGAP-S), we collected ~120,000 km (equivalent to 180,000 km2) of airborne survey data using two Twin Otter aircrafts - one from BAS and one from the United States Antarctic Program (USAP). The aircrafts were equipped with dual-frequency carrier-phase GPS for navigation, laser ranging systems, magnetometers, gravity meters, and ice-sounding radars. We present here the full radar dataset from the BAS PASIN radar system consisting of the deep-sounding chirp and shallow-sounding pulse-acquired data in their processed form, as well as the navigational information of each trace, the surface and bed elevation picks, ice thickness, and calculated absolute surface and bed elevations. This dataset comes primarily in the form of NetCDF and georeferenced SEGY files. To interactively engage with this newly-published dataset, we also created segmented quicklook PDF files of the radar data.

本数据集源自2007-2009国际极地年期间，由七国参与的南极甘布尔采夫省考察队（AGAP）所开展的机载雷达勘测，作业区域覆盖甘布尔采夫冰下山脉、冰穹A（Dome A）以及东南极内陆区域。考察队以部署于冰穹A两侧的野外营地（分别记为AGAP-N与AGAP-S）为作业基点，使用两架双水獭固定翼飞机——一架来自英国南极调查局（BAS），另一架来自美国南极计划（USAP）——采集了约12万公里（对应覆盖面积18万平方公里）的机载勘测数据。两架飞机均搭载双频载波相位GPS导航系统、激光测距系统、磁力仪、重力仪与冰穿透雷达。本文在此提供由英国南极调查局（BAS）PASIN雷达系统获取的完整雷达数据集，包含经过预处理的深部测深线性调频信号数据与浅部测深脉冲采集数据，同时附带每条雷达道的导航信息、地表与冰下基岩高程拾取点、冰厚数据，以及计算得到的绝对地表和基岩高程值。本数据集主要以NetCDF格式与地理参考SEGY文件形式存储。为便于交互式查阅本新发布数据集，我们还制作了雷达数据的分段式快速预览PDF文件。