Abstract

Target water quality parameters may be estimated based on measurements of surrogate water quality parameters, which may be easier to measure than the target parameters. Systems and methods in accordance with aspects of the present teachings may include determining correlations between surrogate parameters and a target parameter using a training sample of data, and using the correlations to estimate values of the target parameter corresponding to out-of-sample measurements of the surrogate parameters. In some examples, determining the correlation between the surrogate parameters and the target parameter includes developing a nonlinear surrogate model that can be described as an almost piecewise linear model.

IPC Classes  ?

• G01N 33/18 - Water
• G06F 17/18 - Complex mathematical operations for evaluating statistical data

Abstract

A hyperspectral sensing device may include an optical collector configured to collect light and to transfer the collected light to a sensor having spectral resolution sufficient for sensing hyperspectral data. In some examples, the sensor comprises a compact spectrometer. The device further comprises a power supply, an electronics module, and an input/output hub enabling the device to transmit acquired data (e.g., to a remote server). In some examples, a plurality of hyperspectral sensing devices are deployed as a network to acquire data over a relatively large area. Methods are disclosed for performing dark-current calibration and/or radiometric calibration on data obtained by the hyperspectral sensing device, and/or another suitable device. Data obtained by the device may be represented in a functional basis space, enabling computations that utilize all of the hyperspectral data without loss of information.

IPC Classes  ?

• G01J 3/28 - Investigating the spectrum
• G01J 3/02 - SpectrometrySpectrophotometryMonochromatorsMeasuring colours Details
• G01J 3/40 - Measuring the intensity of spectral lines by determining density of a photograph of the spectrumSpectrography

Abstract

A hyperspectral sensing device may include an optical collector configured to collect light and to transfer the collected light to a sensor having spectral resolution sufficient for sensing hyperspectral data. In some examples, the sensor comprises a compact spectrometer. The device further comprises a power supply, an electronics module, and an input/output hub enabling the device to transmit acquired data (e.g., to a remote server). In some examples, a plurality of hyperspectral sensing devices are deployed as a network to acquire data over a relatively large area. Methods are disclosed for performing dark-current calibration and/or radiometric calibration on data obtained by the hyperspectral sensing device, and/or another suitable device. Data obtained by the device may be represented in a functional basis space, enabling computations that utilize all of the hyperspectral data without loss of information.

IPC Classes  ?

• G01J 3/28 - Investigating the spectrum
• G01J 3/02 - SpectrometrySpectrophotometryMonochromatorsMeasuring colours Details
• G01J 3/40 - Measuring the intensity of spectral lines by determining density of a photograph of the spectrumSpectrography

Abstract

A method for retrieving a corrected spectrum from a measured spectrum (e.g., retrieving a top-of-water spectrum from a measured top-of-atmosphere spectrum) includes creating a scene-specific model of a region of interest and performing a ray-tracing simulation to simulate rays of light that would reach an airborne (or spaceborne) sensor. The region of interest can be an optically complex area such as an inland or coastal body of water. Based on the ray-tracing simulation, a scene-specific correction for unwanted effects (e.g., adjacency effects, variable atmospheric conditions, and/or other suitable effects) is obtained. A corrected spectrum is obtained by correcting the measured spectrum using the scene-specific correction. The ray-tracing simulation may be performed using a graphical processing unit, allowing the scene-specific correction to be performed in real time or near real time.

IPC Classes  ?

• G01N 33/18 - Water
• G06T 15/06 - Ray-tracing
• G06N 20/00 - Machine learning
• G01N 21/25 - ColourSpectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
• A61B 5/00 - Measuring for diagnostic purposes Identification of persons
• G01J 3/00 - SpectrometrySpectrophotometryMonochromatorsMeasuring colours
• G06T 17/00 - 3D modelling for computer graphics

Abstract

A hyperspectral sensing device may include an optical collector configured to collect light and to transfer the collected light to a sensor having spectral resolution sufficient for sensing hyperspectral data. In some examples, the sensor comprises a compact spectrometer. The device further comprises a power supply, an electronics module, and an input/output hub enabling the device to transmit acquired data (e.g., to a remote server). In some examples, a plurality of hyperspectral sensing devices are deployed as a network to acquire data over a relatively large area.

IPC Classes  ?

• G01J 3/02 - SpectrometrySpectrophotometryMonochromatorsMeasuring colours Details
• G01J 3/04 - Slit arrangements
• G01N 33/18 - Water
• G01N 21/25 - ColourSpectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
• G02B 5/30 - Polarising elements
• G02B 26/04 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light by periodically varying the intensity of light, e.g. using choppers

Abstract

A hyperspectral sensing device may include an optical collector configured to collect light and to transfer the collected light to a sensor having spectral resolution sufficient for sensing hyperspectral data. In some examples, the sensor comprises a compact spectrometer. The device further comprises a power supply, an electronics module, and an input/output hub enabling the device to transmit acquired data (e.g., to a remote server). In some examples, a plurality of hyperspectral sensing devices are deployed as a network to acquire data over a relatively large area.

IPC Classes  ?

• G01N 21/25 - ColourSpectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
• G01J 3/02 - SpectrometrySpectrophotometryMonochromatorsMeasuring colours Details
• G01J 3/04 - Slit arrangements
• G01N 33/18 - Water
• G02B 5/30 - Polarising elements
• G02B 26/04 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light by periodically varying the intensity of light, e.g. using choppers

Abstract

A hyperspectral sensing device may include an optical collector configured to collect light and to transfer the collected light to a sensor having spectral resolution sufficient for sensing hyperspectral data. In some examples, the sensor comprises a compact spectrometer. The device further comprises a power supply, an electronics module, and an input/output hub enabling the device to transmit acquired data (e.g., to a remote server). In some examples, a plurality of hyperspectral sensing devices are deployed as a network to acquire data over a relatively large area. Methods are disclosed for performing dark-current calibration and/or radiometric calibration on data obtained by the hyperspectral sensing device, and/or another suitable device. Data obtained by the device may be represented in a functional basis space, enabling computations that utilize all of the hyperspectral data without loss of information.

IPC Classes  ?

• G01J 3/28 - Investigating the spectrum
• G01J 3/02 - SpectrometrySpectrophotometryMonochromatorsMeasuring colours Details
• G01J 3/40 - Measuring the intensity of spectral lines by determining density of a photograph of the spectrumSpectrography
• G01J 3/433 - Modulation spectrometryDerivative spectrometry
• G01J 3/18 - Generating the spectrumMonochromators using diffraction elements, e.g. grating
• G01J 3/06 - Scanning arrangements
• G01J 3/04 - Slit arrangements
• G01J 3/42 - Absorption spectrometryDouble-beam spectrometryFlicker spectrometryReflection spectrometry

Abstract

A hyperspectral sensing device may include an optical collector configured to collect light and to transfer the collected light to a sensor having spectral resolution sufficient for sensing hyperspectral data. In some examples, the sensor comprises a compact spectrometer. The device further comprises a power supply, an electronics module, and an input/output hub enabling the device to transmit acquired data (e.g., to a remote server). In some examples, a plurality of hyperspectral sensing devices are deployed as a network to acquire data over a relatively large area.

IPC Classes  ?

• G01N 33/18 - Water
• G01J 3/02 - SpectrometrySpectrophotometryMonochromatorsMeasuring colours Details
• G01J 3/04 - Slit arrangements
• G01N 21/25 - ColourSpectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
• G02B 5/30 - Polarising elements
• G02B 26/04 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light by periodically varying the intensity of light, e.g. using choppers