Airborne magnetic and radiometric survey of the southeast Mojave Desert, California and Nevada

A high-resolution airborne magnetic and radiometric survey of the southeast Mojave Desert, parts of California and Nevada was flown by EDCON-PRJ, Inc. from December 13, 2019 to March 21, 2020. The high-resolution fixed-wing survey was flown at a flightline spacing of 200 m, an azimuth of 70 degrees, a nominal elevation above ground of 100 m, and consists of about 17,277 line-kilometers. Tie lines were flown at a flightline spacing of 2 km with an azimuth of 160 degrees. Magnetic data were processed by EDCON-PRJ, Inc. and include corrections for diurnal variations of the Earth's magnetic field, magnetic field of the aircraft, tie-line leveled, micro-leveled, and an International Geomagnetic Reference of the Earth for the time of the survey. Radiometric data were processed by the contractor and include corrections for aircraft and cosmic background radiation, radon background, Compton scattering effects, and variations in altitude. Data presented include a readme file; survey report; magnetic and radiometric databases; and grids of residual magnetic intensity, potassium, equivalent thorium, and equivalent uranium.

EDCON-PRJ, Inc.于2019年12月13日至2020年3月21日，针对加利福尼亚州与内华达州部分区域的莫哈韦沙漠东南部，开展了高分辨率航空磁测（airborne magnetic survey）与放射性测量（radiometric survey）航测任务。本次高分辨率固定翼航测（fixed-wing survey）的飞行线间距（flightline spacing）为200米，方位角（azimuth）为70度，地面标称飞行高度为100米，总测线长度约为17277测线公里（line-kilometers）。联络测线（tie lines）的飞行线间距为2千米，方位角为160度。磁测数据由EDCON-PRJ, Inc.完成处理，包含地球磁场日变校正、飞机平台磁场校正、联络测线平差、微平差，以及测量时段的地球国际地磁参考场（International Geomagnetic Reference Field, IGRF）校正。放射性测量数据由承包商完成处理，包含飞机平台与宇宙背景辐射（cosmic background radiation）校正、氡本底（radon background）校正、康普顿散射效应（Compton scattering effects）校正，以及飞行高度变化校正。本次公开的数据包含自述文档（readme file）、航测报告、磁测与放射性测量数据库，以及剩余磁强度格网、钾元素格网、等效钍（equivalent thorium）格网与等效铀（equivalent uranium）格网。