Intro -- Preface to the second edition -- References -- Preface to the first edition -- References -- From the author -- Author biography -- Alexey Veryaskin -- Chapter 1 Gravity gradiometry -- 1.1 Introduction -- 1.2 History and recent developments -- 1.2.1 Quantum gravity gradiometers -- 1.2.2 Superconducting gravity gradiometers -- 1.2.3 Recent gravity gradiometer developments at Lockheed Martin -- 1.2.4 Conventional absolute gravity gradiometers -- 1.2.5 MEMS gravity gradiometers -- 1.2.6 String (ribbon) gravity gradiometer developments -- 1.3 Classification of existing gravity gradiometers -- 1.4 Gravity gradiometry applications -- 1.4.1 Gravity gradiometry in oil, gas and mineral exploration -- 1.4.2 Borehole gravity gradiometry -- 1.4.3 Project Scorpius -- 1.4.4 Global positioning system (GPS)-free navigation -- 1.4.5 Underground tunnels and void detection -- 1.4.6 Cargo hidden masses detection -- 1.4.7 Space missions -- 1.4.8 Concluding remarks 2021 -- References -- Chapter 2 Magnetic gradiometry -- 2.1 Introduction -- 2.2 History and recent developments -- 2.3 Direct string magnetic gradiometer developments -- 2.4 Advantages of measuring the magnetic gradients -- 2.5 Magnetic gradiometry applications -- 2.5.1 Magnetic gradiometry in oil, gas and mineral exploration -- 2.5.2 Borehole magnetic gradiometry -- 2.5.3 Space missions -- 2.5.4 Archaeology -- 2.5.5 UXO detection -- 2.5.6 Medical applications -- References -- Chapter 3 Electromagnetic gradiometry -- 3.1 Introduction -- 3.2 EM gradiometry in geophysical prospecting -- 3.3 Passive EM gradiometry -- 3.4 A novel EM gradiometric technique for early detection of breast cancer -- References -- Chapter 4 Selected topics of gravity, magnetic and electromagnetic gradiometry -- 4.1 Spatial coordinates and reference frames -- 4.2 Gravity field spatial gradients: representation and properties.

4.3 Gravity gradient tensor for an arbitrary ellipsoid -- 4.4 A simple torsional oscillator in an inhomogeneous gravity field -- 4.5 Noise analysis and problems of optimum detection in gravity gradiometry -- 4.5.1 Problem description -- 4.5.2 Instrumental limit of various gravity gradient measurement methods -- 4.5.3 Thermal limit of various gravity gradient measurement methods -- 4.6 Moving-base gradiometry without gradiometers: back to the future -- 4.6.1 Lorentz force accelerometer -- 4.6.2 System requirements -- 4.6.3 The platform's angular motion effects -- 4.6.4 Gravity gradiometry versus magnetic gradiometry -- 4.7 Electromagnetic gradiometry application examples -- 4.7.1 Theoretical background -- 4.7.2 A simplified integral equation method -- 4.7.3 EM ELF gradiometry applied to massive nickel mineralisation detection -- 4.7.4 The detection of submarines -- 4.8 Gradiometry and gold/copper deposits -- 4.8.1 Gold -- 4.8.2 Copper -- 4.9 Gradiometry around the globe (2020 technology watch report) -- 4.9.1 Airborne electromagnetics (AEM): transient electromagnetics (TEM) -- 4.9.2 Airborne gravity gradiometry (AGG): full tensor gravity gradiometry (FTG) -- 4.9.3 Airborne magnetometry: full tensor magnetic gradiometry (FTMG) -- 4.9.4 Addendum -- References -- Chapter.