A software package for integrating digital elevation models into the digital analysis of remote-sensing data

Duguay, Claude R.; Holder, G.H.; LeDrew, E.; Howarth, Philip J.; Dudycha, Douglas

doi:10.1016/0098-3004(89)90075-7

Cited by 10 publications

(1 citation statement)

References 15 publications

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“…The variable k ′ is the anisotropy index which is utilized to separate diffuse sky irradiance into isotropic and circum-solar components. Values for slope ( s ), angle of incidence ( i ) and shadow ( φ = 0) are generated using the PRODEM software package (Duguay and others, 1989). Finally, a regional albedo (α) can be specified in the equation for snow-covered surfaces in order to take into account the contribution of terrain-reflected radiation to the total irradiance.…”

Section: Description Of the Modelmentioning

confidence: 99%

Modelling the radiation budget of alpine snowfields with remotely sensed data: model formulation and validation

Duguay

1993

Ann. Glaciol.

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A model for estimating the radiation balance of alpine snowfields is presented. Shortwave and longwave downward flux densities are computed for sloping surfaces using a modified version of the two-stream radiative transfer scheme of Zdunkowski and others (1982). Surface albedo and thermal exitance values are estimated using Landsat-5 Thematic Mapper (TM) imagery and digital terrain data. The LOWTRAN7 radiative transfer code is utilized in order to remove atmospheric effects in satellite imagery as well as calculating solar irradiance within TM spectral bands, for the determination of the near-nadir reflectance of snow. Under a Lambertian assumption, near-nadir reflectance measurements obtained from a few TM bands are used to calculate the total hemispherical reflectance (albedo) of snow. The net all-wave radiation of snowfields is then simulated for the complete day on the same date as that of the Landsat overflight. The model is tested using Landsat TM data acquired in late June 1984, and results compared with field measurements acquired on Niwot Ridge, Colorado, U.S.A. Preliminary results are very encouraging but problems remain in the estimation of surface albedo from near-nadir satellite reflectance measurements of TM. These problems are discussed and recommendations for future model improvements are given.

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Section: Description Of the Modelmentioning

confidence: 99%

Modelling the radiation budget of alpine snowfields with remotely sensed data: model formulation and validation

Duguay

1993

Ann. Glaciol.

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Microcomputer Application of Digital Elevation Models and Other Gridded Data Sets for Geologists

Guth

1992

Use of Microcomputers in Geology

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An approach to the estimation of surface net radiation in mountain areas using remote sensing and digital terrain data

Duguay

1995

Theor Appl Climatol

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A software package for integrating digital elevation models into the digital analysis of remote-sensing data

Cited by 10 publications

References 15 publications

Modelling the radiation budget of alpine snowfields with remotely sensed data: model formulation and validation

Modelling the radiation budget of alpine snowfields with remotely sensed data: model formulation and validation

Microcomputer Application of Digital Elevation Models and Other Gridded Data Sets for Geologists

An approach to the estimation of surface net radiation in mountain areas using remote sensing and digital terrain data

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