We present an experimental and theoretical study of a scalar atomic magnetometer using an oscillating field-driven Zeeman resonance in a high-density optically pumped potassium vapor. We describe an experimental implementation of an atomic gradiometer with a noise level below 10 fT Hz−1/2, fractional field sensitivity below 10−9 Hz−1/2, and an active measurement volume of about 1.5 cm3. We show...

We developed a gravity-gradiometer based on atom interferometry for the determination of the Newtonian gravitational constant G. The apparatus, combining a Rb fountain, Raman interferometry and a juggling scheme for fast launch of two atomic clouds, was specifically designed to reduce possible systematic effects. We present instrument performances and show that the sensor is able to detect the ...

The stratospheric balloon magnetic gradiometer system is developed and maintained at IZMIRAN already about 20 years. This system consists of three instrumental containers uniformly placed along a vertical 6 km line. System allows measuring parameters of the geomagnetic field along the whole flight trajectory. The GPS-receivers, located in each instrumental container, fix the flight coordinates....

Scott Hogg & Associates Ltd. have completed the development of a 3-axis, helicopter towed, aeromagnetic gradiometer. The towed bird is a complete airborne system with 4 cesium sensors, radar altimeter, pitch, roll and yaw measurement, a 3-axis magnetic fluxgate and a GPS positioning system. The system is designed to provide accurate geo-referenced magnetic gradients; G-east, G-north and Gvertic...

Over the past decade, notable progress has been made in the performance of airborne geophysical systems for mapping and detection of unexploded ordnance in terrestrial and shallow marine environments. For magnetometer systems, the most significant improvements include development of denser magnetometer arrays and vertical gradiometer configurations. In prototype analyses and recent Environmenta...

Ancient Šuruppak, today Fara, was one of the major Sumerian cities in Mesopotamia. It situated along ancient watercourses Euphrates River. Findings date it back to Jemdet Nasr period around 3000 bc with a continuous occupation until end Ur III 2000 bc. Fara first explored and excavated by Deutsche Orient-Gesellschaft years 1902 1903 under direction Walter Andrae. Multiple excavation trenches le...