Remote Sensing - Spectral Imaging


Remote Sensing of Range (Distance, Position) and Velocity







Remote Sensing of Magnetic Fields - Remote Optical Magnetometry - Magneto-Optical Phenomena


Faraday effect (rotation)

A magnetic field rotates the polarization of light proportionally to magnetic field strength.

  Surface Magneto-Optic         Kerr Effect (SMOKE)

Light reflected from a magnetized surface (object) can change in polarization and intensity.

Zeeman effect spectroscopy

A magnetic field splits spectral lines in a manner that is dependent on the strength of the magnetic field.

Measurement of the magnetic field of the Sun and other stars, the Earth and plasmas.

Magnetographs based on light analysis.

Laser/LIDAR Magnetometry (Laser Guide Star tech - LGS) Larmor precession frequency interrogation

Magnetic field strength is proportional to  Larmor frequency (precession frequency). By measuring the Larmor frequency of atoms, we can determine the magnetic field in which the atoms are immersed.

Measurement of the Earth's magnetic field with atoms and light.











Sensing of Electric Fields - Electrometry 

Sensing of the electric component of electromagnetic fields


Magnetic Resonance Current Density Imaging (MRCDI)

Current density imaging with Magnetic Resonance (MR)

(MR-based Magnetometry)


AC Stark effect or Autler–Townes effect

Splitting/spacing of spectral lines proportional to electric field amplitude
Atomic spectroscopy and
Electromagnetically Induced Transparency (EIT)

Atomic radio / antenna


Sensing Magnetic and Electric fields, Motion/Acceleration/Rotation with Atom Interferometers


Atom interferometers

Atoms interferometers and phase lags 



Human Remote Sensing - Human Spectral Imaging


Thermal Sensing - Long-Wave Infrared (LWIR)

Hyperpectral imaging - Wikipedia



Thermal Sensing - Long-Wave Infrared (LWIR)

Infrared - Wikipedia 



Doppler RADAR Sensing of Human Gait (cf. walking)

ref. p.20 






Medical or Physiological Monitoring (Sensing) - Physiological Spectral Imaging

Physiological Monitoring (Sensing) includes Remote Physiological Monitoring (Sensing) performed with non-contact remote techniques which use physiological monitoring RADAR systems.



Remote Cardiorespiratory Monitoring (Sensing) with RADAR

Doppler RADAR

Chip Transceiver (Emitter and Receiver)

(Droitcour A.D. dissertation - Stanford)




Horn antenna - Katabi MIT lab "EQ-Radio"

RADAR approach combined with algorithms for emotion detection




Parabolic antenna (dish) - RADAR cardiogram at 15 ft

Remote Vital Sign Monitor (RVSM) for Olympic athletes (Atlanta Olympics1996) 





Remote Cardiac Monitoring (Sensing) and Remote Cardiac Biometrics with LIDAR


Laser Doppler vibrometry

MIT Tech Review: "The Pentagon has a laser that can identify people from a distance—by their heartbeat". Details





Neural Monitoring (Neural Sensing) 






Magnetoencephalography with SQUID magnetometers 

Superconducting magnetometers


Magnetoencephalography with optical/atomic magnetometers

SERF magnetometers

(structural) MRI - Magnetic Resonance Imaging



functional MRI (fMRI)



functional Near-Infrared Spectroscopy Imaging (fNIRS)



Magnetic Resonance - Magnetic Resonance Imaging (MRI)


Magnetic Resonance: A magnetic field splits spin energetic levels and induces spin precession. Energy transitions under conditions of Magnetic Resonance.

MRI: Polarization

A magnetic field induces spin polarization and a net magnetization

MRI: Detection

An RF tips the magnetization with energy absorption. During magnetization decay a signal (FID) is emitted.

MRI: Polarization enhancement techniques

MRI: Detection RF pulse design

Inducing a Steady State Magnetization providing a continuously emitted signal from the subject