The CONTOUR remote imager and spectrograph

Fort, D.; Warren, J.; Strohbehn, K.; Murchie, S. L.; Heyler, Gene A.; Peacock, Keith; Boldt, J.; Darlington, E. H.; Hayes, J. R.; Henshaw, Robert M.; Izenberg, N. R.; Kardian, Charles J.; Lees, Jeffrey; Lohr, D.; Mehoke, Douglas S.; Schaefer, Edward D.; Sholar, T.; Spisz, Thomas S.; Willey, Cliff E.

doi:10.1016/s0094-5765(02)00184-4

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“…f r (ϑ i , φ i , ϑ r , φ r , λ) denotes the BRDF at the specific wavelength λ, while E sun signifies the spectral irradiance of sunlight at the same wavelength λ. The scattering intensity can be represented by Equation (15).…”

Section: Algorithm Accuracy Verificationmentioning

confidence: 99%

“…D. Fort introduced the CONTOUR Remote Imager and Spectrograph (CRISP) instrument, which tracks the nuclei of comets, acquiring spectral information in the visible and infrared wavelengths. It is capable of conducting detailed measurements of gas and dust composition [15]. P. M. Teillet et al introduced the use of the GER3700 spectrometer to collect surface reflectance spectral datasets at Cutbank Creek [16].…”

Section: Introductionmentioning

confidence: 99%

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A Calculation Method for the Hyperspectral Imaging of Targets Utilizing a Ray-Tracing Algorithm

Cao,

et al. 2024

Remote Sensing

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This paper proposes a hyperspectral imaging simulation method based on a ray-tracing algorithm. The algorithm combines calculations based on solar and atmospheric visible light radiation as well as the spectral bidirectional reflection distribution function (BRDF) of the target surface material and can create its own scenarios for simulation calculations on demand. Considering the presence of multiple scattering between the target and background, using the ray-tracing algorithm enables the precise computation of results involving multiple scattering. To validate the accuracy of the algorithm, we compared the simulated results with the theoretical values of the visible light scattering intensity from a Lambertian sphere. The relative error obtained was 0.8%. Subsequently, a complex scene of engineering vehicles and grass was established. The results of different observation angles and different coating materials were calculated and analyzed. In summary, the algorithm presented in this paper has the following advantages. Firstly, it is applicable to geometric models composed of any triangular mesh elements and accurately computes the effects of multiple scattering. Secondly, the algorithm combines the spectral BRDF information of materials and improves the efficiency of multiple scattering calculations using nonuniform sampling. The computed hyperspectral scattering data can be applied to simulate airborne or space-borne remote sensing data.

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Section: Algorithm Accuracy Verificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%