Airborne geophysical survey: Knoxville 1° x 2° Quadrangle

Aeromagnetic and aeroradiometric data were collected along flight lines by instruments in an aircraft that recorded magnetic-field and radiometric values and locations. The magnetic data set presents latitude, longitude, altitude, and magnetic-field values. Geologic symbols or codes are also included. The geologic symbols were picked from surficial geologic maps. The radiometric data set presents latitude, longitude, altitude, geologic symbols or codes, apparent Uranium (Bismuth 214), Thorium (Thallium 208), and Potassium (K 40), the element ratios, and ancillary information.本数据集包含航空磁测数据（Aeromagnetic data）与航空放射性测量数据（aeroradiometric data），均由机载仪器沿飞行航线采集，同步记录磁场值、放射性测量值与定位信息。磁测数据集（magnetic data set）包含纬度、经度、飞行高度与磁场强度值，同时附带地质符号与编码。上述地质符号与编码均提取自表层地质图（surficial geologic maps）。放射性测量数据集（radiometric data set）则包含纬度、经度、飞行高度、地质符号或编码、视铀量（铋214）、视钍量（铊208）、钾-40（K 40）、元素比值及辅助信息。