EAGLE/ICECAP II - geophysical observations (surface and bed elevation, ice thickness, gravity disturbance and magnetic anomalies) - 2015-2018

These aerogeophysical data were collected as part of the ICECAP (International Collaborative Exploration of the Cryosphere through Airborne Profiling) collaboration in 2015/16 (ICP7), 2016/17 (ICP8) and 2018/19 (ICP10). These data were in part funded by the US National Science Foundation (grant PLR-1543452 to UTIG), Antarctic Gateway, ACE-CRC the G. Unger Vetlesen Foundation, and supported by the Australian Antarctic Division through project AAS-4346.This data collection represents geolocated, time registered geophysical observations (L2 data). These data are derived from L0 and L1B data published as separate datasets. The data format are space delimited ASCII files, following the formats used for UTIG/AAD/NASA's predecessor ICECAP/OIB project at NASA's NSIDC DAAC. Fields are described in the # delimited detailed header for each granule. MAGNETICSMagnetics provides constraints on the depth to crystalline rock, and hence indicates the density of bathymetryEMGEO2     geolocated magnetic anomaly profiles, 10 Hz ASCIIGRAVITYGravity data is used to infer bathymetry, by looking at the density contrast between water and bathymetryEGCMG2    geolocated free air gravity disturbance profiles; 10 Hz ASCIIALTIMETRYRepeat track laser altimetry provides a history of thinning of outlet glaciersELUTP2    geolocated ice surface elevation profiles; 3.5 Hz ASCIIRADAR Ice penetrating radar provides the geometry of the ice shelves and outlet glaciers, and provides constraints on properties at the base of the ice (e.g. subglacial waters, sub ice shelf melting)ER2HI2        geolocated ice thickness, bed and surface elevation and echo amplitude, and surface range; 4 Hz ASCII; incoherent, unmigrated processing (pik1).A data update to include 2018 data was provided in 2022.A data update to include 2017 data was provided in 2025.

本航空地球物理数据集为2015/16年度（ICP7）、2016/17年度（ICP8）及2018/19年度（ICP10）ICECAP（International Collaborative Exploration of the Cryosphere through Airborne Profiling，国际冰冻圈航空探测合作计划）合作项目的采集成果。本数据集部分经费由美国国家科学基金会（向德克萨斯大学奥斯汀分校地球物理研究所UTIG发放的PLR-1543452号资助）、南极门户（Antarctic Gateway）、ACE-CRC以及G·昂格·韦特莱森基金会提供，并由澳大利亚南极局通过AAS-4346项目提供支持。
本数据集包含经地理定位、时间配准的地球物理观测数据（L2级数据），其源数据为单独发布的L0与L1B级数据集。数据格式为空格分隔的ASCII文件，沿用了UTIG/AAD/NASA此前在美国国家航空航天局（NASA）国家雪冰数据中心分布式活动档案库（NSIDC DAAC）开展的ICECAP/OIB项目所采用的格式。每个数据粒的详细字段说明均包含在以#符号分隔的表头中。
MAGNETICS磁测数据：磁测数据可约束结晶岩的埋藏深度，进而反映海底地形的密度特征。EMGEO2：经地理定位的磁异常剖面数据，采样率为10 Hz，格式为ASCII。
GRAVITY重力数据：重力数据通过分析水体与海底地形之间的密度差，可反演获得海底地形。EGCMG2：经地理定位的自由空气重力扰动剖面数据，采样率为10 Hz，格式为ASCII。
ALTIMETRY测高数据：重复轨道激光测高数据可记录出口冰川的变薄演化历史。ELUTP2：经地理定位的冰面高程剖面数据，采样率为3.5 Hz，格式为ASCII。
RADAR冰穿透雷达数据：冰穿透雷达可揭示冰架与出口冰川的内部几何结构，并约束冰盖底部的相关物理性质（例如冰下水体、冰架底部融化情况）。ER2HI2：经地理定位的冰厚、床面与冰面高程、回波振幅以及地表测距数据，采样率为4 Hz，格式为ASCII；采用非相干、未偏移处理流程（pik1）。
本数据集曾于2022年更新，补充纳入2018年度的观测数据；并于2025年再次更新，补充纳入2017年度的观测数据。