Radiative Transfer Models

Efremenko, Dmitry; Kokhanovsky, Alexander A.

doi:10.1007/978-3-030-66745-0_4

Cited by 1 publication

(1 citation statement)

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“…The TOA measurements simulated from the reference data (Figure 6) were compared for the assessment. The bottom of atmosphere (BOA) data were processed to obtain the TOA values by (i) estimating the Bidirectional Reflectance Distribution Function (BRDF) model; (ii) generating the spectrum over spectral interval; (iii) computing the TOA values by using the Second Simulation of the Satellite Signal in the Solar Spectrum (6S) Radiative Transfer (RT) [37]; and (iv) interpolating the TOA spectrum with SkySat relative spectral response (RSR-spectral convolution). The BOA reference spectra were employed to simulate TOA references in consideration of the image acquisi- On the other hand, the SNR was also computed using the MTF target at the Salon de Provence test site.…”

Section: Radiometric Calibration Quality Assessment Approachmentioning

confidence: 99%

SkySat Data Quality Assessment within the EDAP Framework

Saunier¹,

Karakas

Yalcin

et al. 2022

Remote Sensing

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Cal/Val activities within the Earthnet Data Assessment Pilot (EDAP) Project of the European Space Agency (ESA) cover several Earth Observation (EO) satellite sensors, including Third-Party Missions (TPMs). As part of the validation studies of very-high-resolution (VHR) sensor data, the geometric and radiometric quality of the images and the mission compliance of the SkySat satellites owned by Planet were evaluated in this study. The SkySat constellation provides optical images with a nominal spatial resolution of 50 cm, and has the capacity for multiple visits of any place on Earth each day. The evaluations performed over several test sites for the purpose of the EDAP Maturity Matrix generation show that the high resolution requirement is fulfilled with high geometric accuracy, although various systematic and random errors could be observed. The 2D and 3D information extracted from SkySat data conform to the quality expectations for the given resolution, although improvements to the vendor-provided rational polynomial coefficients (RPCs) are essential. The results show that the SkySat constellation is compliant with the specifications and the accuracy results are within the ranges claimed by the vendor. The signal-to-noise ratio assessments revealed that the quality is high, but variations occur between the different sensors.

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Section: Radiometric Calibration Quality Assessment Approachmentioning

confidence: 99%