Measurement of the spectral directional reflectance of forest canopies: A review of methods and a practical application

Abstract In this paper we review methods to measure the spectral directional reflectance of forest canopies and investigate the use of a helicopter platform to gather spectral reflectance data from deciduous forest. Six sparse sampling geometries are identified: nadir, hot‐spot, solar almucantar, solar principal plane, orthogonal plane and twin azimuthal planes. A portable spectroradiometer is used from a helicopter to measure the nadir reflectance of an oak (Quercus robur) plantation at heights from 150 to 760 metres. Near‐simultaneous reflectance measurements of an area of mown grass from 150 metres and ground level are used to correct for the effect of the rotor blades on the irradiance measured from the helicopter. Variations in the amount of water vapour with height and between two sites 30 km apart are inferred from the relative depth of the atmospheric absorption feature at 940 nm.

[1]  Gautam Badhwar,et al.  Spectral Characterization of Biophysical Characterstics in a Boreal Forest: Relationship between Thematic Mapper Band Reflectance and Leaf Area Index for Aspen , 1986, IEEE Transactions on Geoscience and Remote Sensing.

[2]  D. Kimes,et al.  Remote sensing of surface hemispherical reflectance (albedo) using pointable multispectral imaging spectroradiometers , 1992 .

[3]  J. Clevers.  Multispectral aerial photography as a new method in agricultural field trial analysis. , 1988 .

[4]  Vern C. Vanderbilt,et al.  Tree canopy radiance measurement system , 1989 .

[5]  Alan H. Strahler,et al.  Modeling bidirectional radiance measurements collected by the advanced Solid-State Array Spectroradiometer (ASAS) over oregon transect conifer forests☆ , 1994 .

[6]  Edward J. Milton,et al.  Ground radiometry and airborne multispectral survey of bare soils , 1987 .

[7]  Michael C. Blue,et al.  Robotic Data Acquisition of Directional Reflectance Factors , 1989 .

[8]  David J. Diner,et al.  Extraction of spectral hemispherical reflectance (albedo) of surfaces from nadir and directional reflectance data , 1987 .

[9]  Craig S. T. Daughtry,et al.  Estimating big bluestem albedo from directional reflectance measurements , 1988 .

[10]  Robert B. Waide,et al.  Tropical forest biomass and successional age class relationships to a vegetation index derived from Landsat TM data , 1989 .

[11]  K. Coulson,et al.  The Spectral Reflectance of Natural Surfaces , 1971 .

[12]  Craig S. T. Daughtry,et al.  A new technique to measure the spectral properties of conifer needles , 1989 .

[13]  W. J. Looyen,et al.  Aircraft experiments with visible and infrared sensors , 1992 .

[14]  Ross Nelson,et al.  Directional Reflectance Distributions of a Hardwood and Pine Forest Canopy , 1986, IEEE Transactions on Geoscience and Remote Sensing.

[15]  C. Walthall,et al.  Assessing spatial and seasonal variations in grasslands with spectral reflectances from a helicopter platform , 1992 .

[16]  David W. Graham,et al.  Prediction and measurement of soil bidirectional reflectance , 1992, IEEE Trans. Geosci. Remote. Sens..

[17]  Steven W. Running,et al.  Remote sensing of temperate coniferous forest leaf area index The influence of canopy closure, understory vegetation and background reflectance , 1990 .

[18]  F. M. Danson,et al.  Advances in environmental remote sensing , 1995 .

[19]  Dieter Steiner,et al.  Russian data on spectral reflectance of vegetation, soil and rock types : final technical report , 1966 .

[20]  Darrel L. Williams,et al.  An off-nadir-pointing imaging spectroradiometer for terrestrial ecosystem studies , 1991, IEEE Trans. Geosci. Remote. Sens..

[21]  K. Cooper,et al.  A Monte Carlo Reflectance Model for Soil Surfaces with Three-Dimensional Structure , 1985, IEEE Transactions on Geoscience and Remote Sensing.

[22]  D. H. Card,et al.  Remote sensing of forest canopy and leaf biochemical contents , 1988 .

[23]  Robert J. Wheeler,et al.  A multiwavelength Airborne Radiometer Scanner (ARS) for measuring surface bidirectional reflectance characteristics , 1994 .

[24]  A. Goetz,et al.  Column atmospheric water vapor and vegetation liquid water retrievals from Airborne Imaging Spectrometer data , 1990 .

[25]  K. Kriebel,et al.  Measured spectral bidirectional reflection properties of four vegetated surfaces. , 1978, Applied optics.

[26]  Philip H. Swain,et al.  Remote Sensing: The Quantitative Approach , 1981, IEEE Transactions on Pattern Analysis and Machine Intelligence.

[27]  Sergio Vetrella,et al.  Tethered balloons as geostationary platforms for multispectral radiometry , 1977 .

[28]  R. J. Brown,et al.  The Field Spectral Measurements Program of the Canada Centre for Remote Sensing , 1980 .

[29]  Darrel L. Williams,et al.  High-spectral resolution field and laboratory optical reflectance measurements of red spruce and eastern hemlock needles and branches , 1994 .

[30]  K. W. Böer.  The solar spectrum at typical clear weather days , 1976 .

[31]  An evaluation of ultralight aircraft capability for remote sensing applications in West Africa , 1986 .

[32]  Giles M. Foody,et al.  Analysis and representation of vegetation continua from Landsat Thematic Mapper data for lowland heaths , 1989 .

[33]  J. Kleman.  The spectral reflectance of stands of Norway Spruce and Scotch Pine, measured from a helicopter , 1986 .

[34]  K. Ranson,et al.  Scene Shadow Effects on Multispectral Response , 1987, IEEE Transactions on Geoscience and Remote Sensing.

[35]  Charles L. Walthall,et al.  Estimation of Shortwave Hemispherical Reflectance (Albedo) from Bidirectionally Reflected Radiance Data , 1991 .

[36]  Darrel L. Williams.  A comparison of spectral reflectance properties at the needle, branch, and canopy level for selected Conifer species , 1991 .

[37]  Ramakrishna R. Nemani,et al.  Mapping regional forest evapotranspiration and photosynthesis by coupling satellite data with ecosystem simulation , 1989 .

[38]  J. Norman,et al.  Modeling the Radiant Transfers of Sparse Vegetation Canopies , 1985, IEEE Transactions on Geoscience and Remote Sensing.

[39]  M. J. Barnsley,et al.  Effects of off-nadir view angles on the detected spectral response of vegetation canopies , 1984 .

[40]  A. Goetz,et al.  Terrestrial imaging spectroscopy , 1988 .

[41]  G. Guyot,et al.  Factors affecting the spectral response of forest canopies: A review , 1989 .

[42]  S. Gerstl,et al.  Radiation physics and modelling for off-nadir satellite sensing of non-Lambertian surfaces , 1986 .

[43]  Darrel L. Williams,et al.  Forest ecosystem dynamics: linking forest succession, soil process and radiation models , 1993 .

[44]  J. Irons,et al.  Multiple-Angle Observations of Reflectance Anisotropy from an Airborne Linear Array Sensor , 1987, IEEE Transactions on Geoscience and Remote Sensing.

[45]  Compton J. Tucker,et al.  Directional reflectance factor distributions for cover types of Northern Africa , 1985 .

[46]  D. P. Roy,et al.  The importance of instrument pointing accuracy for surface bidirectional reflectance distribution function mapping , 1994 .

[47]  Yosio Edemir Shimabukuro,et al.  The least-squares mixing models to generate fraction images derived from remote sensing multispectral data , 1991, IEEE Trans. Geosci. Remote. Sens..

[48]  Thomas F. Eck,et al.  Reflectance anisotropy for a spruce-hemlock forest canopy , 1994 .

[49]  Larry Biehl,et al.  Changes in spectral properties of detached birch leaves , 1985 .

[50]  Remote sensing to predict the yield of sugar beet in England. , 1990 .

[51]  P A Murtha.  SYMPOSIUM ON REMOTE SENSING FOR VEGETATION DAMAGE ASSESSMENT , 1978 .

[52]  W. Cohen,et al.  Estimating structural attributes of Douglas-fir/western hemlock forest stands from Landsat and SPOT imagery , 1992 .

[53]  D. Deering,et al.  A sphere-scanning radiometer for rapid directional measurements of sky and ground radiance: The PARABOLA field instrument , 1984 .

[54]  James A. Smith,et al.  A Portable Instrument for Simultaneous Recording of Scene Composition and Spectral Reflectance , 1978 .

[55]  R. Desjardins,et al.  Multispectral radiometer to measure crop canopy characteristics , 1983 .

[56]  Darrel L. Williams,et al.  Comparative analysis of data acquired by three narrow-band airborne spectroradiometers over subboreal vegetation , 1994 .

[57]  C. Tucker,et al.  Optimal directional view angles for remote-sensing missions , 1984 .

[58]  Craig S. T. Daughtry,et al.  Surface albedo from bidirectional reflectance , 1991 .

[59]  D. Kimes.  Dynamics of directional reflectance factor distributions for vegetation canopies. , 1983, Applied optics.

[60]  S. Franklin,et al.  Empirical relations between digital SPOT HRV and CASI spectral response and lodgepole pine (Pinus contorta) forest stand parameters , 1993 .

[61]  Janet Franklin,et al.  Thematic mapper analysis of coniferous forest structure and composition , 1986 .

[62]  D S Kimes,et al.  Spectral radiance errors in remote sensing ground studies due to nearby objects. , 1983, Applied optics.

[63]  W. Wobrock,et al.  Direct solar radiation: spectrum and irradiance derived from sun-photometer measurements. , 1988, Applied optics.

[64]  D. J. Jobson,et al.  Remote sensing of benthic microalgal biomass with a tower-mounted multispectral scanner , 1980 .