South West Coastal Plain & South Coast TEMPEST AEM Survey, Western Australia, 2013

Between the 31st of March 2013 and the 15th of May 2013, Fugro Airborne Surveys Pty. Ltd., (FAS, now known as CGG Aviation (Australia) Pty Ltd) undertook a TEMPEST® airborne electromagnetic and magnetic survey over the South West Coastal Plain and the South Coast areas of Western Australia. There were four separate project areas: (1) Swan Coastal Plain, (2) Scott Coastal Plain, (3) Albany, (4) Esperance.

The survey is designed to map groundwater resources and assess aquifer sustainability in four separate areas of southern WA. The survey areas are located in:

1. Esperance: Traverses spaced 300 & 600 metres apart in a north-south direction at 120 metres above ground level totalling 1,133 line km.
2. Albany: Traverses spaced 300 & 600 metres apart in a north-south direction at 120 metres above ground level totalling 2,163 line km.
3. Scott Coastal Plain: Traverses spaced 600 metres apart in a ne-sw direction at 120 metres above ground level totalling 2,980 line km.
4. Swan Coastal Plain: Traverses spaced 600 metres apart in a nw-se direction at 120 metres above ground level totalling 2,303 line km.

The total coverage of the survey amounted to 8,579 line kilometres. The survey was flown using a Shorts Skyvan (SC3-200) aircraft, registration VH-WGT, owned and operated by FAS.

The survey was commissioned by the Western Australia Department of Water, and was managed by Geoscience Australia. The Survey received funding from the WA Government's Royalties for Regions program to assess, plan and investigate regional water availability in Western Australia.

The data release includes the final contractor supplied datasets. The data are available from Geoscience Australia's web site free of charge.

Each data package includes:
1. Point-located electromagnetic data with associated position, altimeter, orientation, magnetic, and derived ground elevation data. These data are in ASCII column format with associated ASEG-GDF2 header files.
2. Point-located conductivity estimates derived using the EM Flow® conductivity depth imaging (CDI) algorithm with associated position, altimeter, magnetic, and derived ground elevation data. Data include the conductivity estimate for each 5 m interval and selected depth slices. These data are in ASCII column format with associated ASEG-GDF2 header files.
3. Gridded data, at 60 or 120 m cell size, for the conductivity depth slices derived from the EM Flow® CDI data, magnetics and elevation data in ER Mapper® binary raster grid format with associated header files.
4. Graphical multiplots, in PDF format, for each flight line showing EM Flow® CDI sections and profiles of electromagnetic data, magnetics, monitors, height and orientation data.
5. Operations Report.
6. Metadata and License files.

2013年3月31日至2013年5月15日期间，Fugro航空测量私人有限公司（FAS，现更名为CGG航空（澳大利亚）私人有限公司）在澳大利亚西南部沿海平原及南海岸区域开展了TEMPEST®航空电磁与磁法测量。本次项目共涵盖4个独立作业区域：(1) 天鹅沿海平原（Swan Coastal Plain）、(2) 斯科特沿海平原（Scott Coastal Plain）、(3) 奥尔巴尼（Albany）、(4) 埃斯佩兰斯（Esperance）。

本次测量旨在绘制西澳大利亚州南部4个独立区域的地下水资源分布图，并评估含水层可持续性。各测量区域详情如下：
1. 埃斯佩兰斯：测线沿南北方向布设，线距为300米与600米，飞行高度为地面以上120米，总测线长度达1133千米。
2. 奥尔巴尼：测线沿南北方向布设，线距为300米与600米，飞行高度为地面以上120米，总测线长度达2163千米。
3. 斯科特沿海平原：测线沿东北-西南方向布设，线距为600米，飞行高度为地面以上120米，总测线长度达2980千米。
4. 天鹅沿海平原：测线沿西北-东南方向布设，线距为600米，飞行高度为地面以上120米，总测线长度达2303千米。

本次测量总覆盖测线长度达8579千米，作业使用注册号为VH-WGT的Shorts Skyvan（SC3-200）型飞机，由FAS所有并运营。

本项目由西澳大利亚州水务部委托，澳大利亚地质调查局（Geoscience Australia）负责管理，资金来源于西澳政府的“矿区使用费惠及地区”（Royalties for Regions）计划，用于评估、规划与调查西澳大利亚州的区域水资源可利用性。

本次数据发布包含承包商最终提交的全套数据集，可从澳大利亚地质调查局官网免费获取。

每个数据数据包包含以下内容：
1. 定点电磁数据，附带位置、高度计、姿态、磁法及派生地面高程数据。该类数据采用ASCII列格式存储，配套ASEG-GDF2格式头文件。
2. 基于EM Flow®电导率深度成像（CDI）算法生成的定点电导率估算数据，附带位置、高度计、磁法及派生地面高程数据。数据包含每5米间隔的电导率估算值及选定深度切片数据，采用ASCII列格式存储，配套ASEG-GDF2格式头文件。
3. 基于EM Flow® CDI数据、磁法数据及高程数据生成的网格化数据，单元格尺寸为60米或120米，采用ER Mapper®二进制栅格格式存储，配套头文件。
4. 针对每条飞行航线的PDF格式多图图形文件，展示EM Flow® CDI剖面、电磁数据、磁法数据、监测数据、高度及姿态数据的剖面信息。
5. 作业报告。
6. 元数据与授权文件。