Development of a Multimode Field Deployable Lidar Instrument for Topographic Measurements of Unsaturated Soil Properties: Instrument Description

The hydrological and mechanical behavior of soil is determined by the moisture content, soil water (matric) potential, fines content, and plasticity. However, these parameters are often difficult or impractical to determine in the field. Remote characterization of soil parameters is a non-destructive data collection process well suited to large or otherwise inaccessible areas. A ground-based, field-deployable remote sensor, called the soil observation laser absorption spectrometer (SOLAS), was developed to collect measurements from the surface of bare soils and to assess the in-situ condition and essential parameters of the soil. The SOLAS instrument transmits coherent light at two wavelengths using two, continuous-wave, near-infrared diode lasers and the instrument receives backscattered light through a co-axial 203-mm diameter telescope aperture. The received light is split into a hyperspectral sensing channel and a laser absorption spectrometry (LAS) channel via a multi-channel optical receiver. The hyperspectral channel detects light in the visible to shortwave infrared wavelengths, while the LAS channel filters and directs near-infrared light into a pair of photodetectors. Atmospheric water vapor is inferred using the differential absorption of the onand off-line laser wavelengths (823.20 nm and 847.00 nm, respectively). Range measurement is determined using a frequency-modulated, self-chirped, coherent, homodyne detection scheme. The development of the instrument (transmitter, receiver, data acquisition components) is described herein. The potential for rapid characterization of physical and hydro-mechanical soil properties, including volumetric water content, matric potential, fines content, and plasticity, using the SOLAS remote sensor is discussed. The envisioned applications for the instrument include assessing soils on unstable slopes, such as wildfire burn sites, or stacked mine tailings. Through the combination of spectroradiometry, differential absorption, and range altimetry methodologies, the SOLAS instrument is a novel approach to ground-based remote sensing of the natural environment.

[1]  Merrill I. Skolnik,et al.  Theoretical Accuracy of Radar Measurements , 1960, IRE Transactions on Aeronautical and Navigational Electronics.

[2]  S. Jones,et al.  A linear physically-based model for remote sensing of soil moisture using short wave infrared bands , 2015 .

[3]  Atsushi Sato,et al.  Ground-based integrated path coherent differential absorption lidar measurement of CO 2 : foothill target return , 2012 .

[4]  L M Little,et al.  Fiber-based lidar for atmospheric water-vapor measurements. , 2001, Applied optics.

[5]  Ana. Baselga Mateo,et al.  APPLICATIONS OF HIGH RESOLUTION AND ACCURACY FREQUENCY MODULATED CONTINUOUS WAVE LADAR , 2014 .

[6]  E. Fry,et al.  Absorption spectrum (380-700 nm) of pure water. II. Integrating cavity measurements. , 1997, Applied optics.

[7]  John K. Park.  A Soil Moisture Reflectance Model in Visible and Near IR Bands , 1980 .

[8]  David D. Turner,et al.  Validation of a Water Vapor Micropulse Differential Absorption Lidar (DIAL) , 2016 .

[9]  R. J. Hanks,et al.  REFLECTION OF RADIANT ENERGY FROM SOILS , 1965 .

[10]  W. Philpot,et al.  Relationship between surface soil water content, evaporation rate, and water absorption band depths in SWIR reflectance spectra , 2015 .

[11]  J. Bösenberg,et al.  Ground-based differential absorption lidar for water-vapor and temperature profiling: methodology. , 1998, Applied optics.

[12]  D Bruneau,et al.  Airborne Lidar LEANDRE II for Water-Vapor Profiling in the Troposphere. I. System description. , 2001, Applied optics.

[13]  R. Henry,et al.  Simultaneous Determination of Moisture, Organic Carbon, and Total Nitrogen by Near Infrared Reflectance Spectrophotometry , 1986 .

[14]  J. De Baerdemaeker,et al.  Characterization of Soil Water Content Using Measured Visible and Near Infrared Spectra , 2006 .

[15]  L. Janik,et al.  Characterization and analysis of soils using mid-infrared partial least-squares .2. Correlations with some laboratory data , 1995 .

[16]  Xavier Briottet,et al.  Estimation of Soil Moisture Content from the Spectral Reflectance of Bare Soils in the 0.4–2.5 μm Domain , 2015, Sensors.

[17]  William B. Grant,et al.  Differential absorption and Raman lidar for water vapor profile measurements; A review , 1991 .

[18]  L. Kou,et al.  Refractive indices of water and ice in the 0.65- to 2.5 micrometer spectral range , 1993 .

[19]  Kevin S. Repasky,et al.  Eye-Safe Diode-Laser-Based Micropulse Differential Absorption Lidar (DIAL) for Water Vapor Profiling in the Lower Troposphere , 2011 .

[20]  D Bruneau,et al.  Airborne Lidar LEANDRE II for Water-Vapor Profiling in the Troposphere. II. First results. , 2001, Applied optics.

[21]  R. Hardesty,et al.  Coherent DIAL measurement of range-resolved water vapor concentration. , 1984, Applied optics.

[22]  Gang Li,et al.  The HITRAN 2008 molecular spectroscopic database , 2005 .

[23]  G. Mégie,et al.  Complementarity of UV and IR differential absorption lidar for global measurements of atmospheric species. , 1980, Applied optics.

[24]  Susan A. Kooi,et al.  Airborne Validation of Laser Remote Measurements of Atmospheric Carbon Dioxide , 2010 .

[25]  W. Mauser,et al.  Modelling and model verification of the spectral reflectance of soils under varying moisture conditions , 1994, Proceedings of IGARSS '94 - 1994 IEEE International Geoscience and Remote Sensing Symposium.

[26]  Carranza Díaz,et al.  Espectroscopía de reflectancia difusa – NIR para la determinación del contenido de agua en el suelo , 2020 .

[27]  Michael D. Obland,et al.  Water vapor profiling using a widely tunable amplified diode laser Differential Absorption Lidar (DIAL) , 2009 .

[28]  F. Baret,et al.  Relating soil surface moisture to reflectance , 2002 .

[29]  Alex B. McBratney,et al.  Simultaneous estimation of several soil properties by ultra-violet, visible, and near-infrared reflectance spectroscopy , 2003 .

[30]  M. Shumate,et al.  Remote measurements of ambient air pollutants with a bistatic laser system. , 1976, Applied optics.

[31]  Keith D. Shepherd,et al.  Rapid estimation of soil engineering properties using diffuse reflectance near infrared spectroscopy , 2014 .

[32]  Mogens Humlekrog Greve,et al.  Comparing Predictive Abilities of Three Visible-Near Infrared Spectrophotometers for Soil Organic Carbon and Clay Determination , 2013 .

[33]  D. Cozzolino,et al.  The potential of near-infrared reflectance spectroscopy to analyse soil chemical and physical characteristics , 2003, The Journal of Agricultural Science.

[34]  Rongqing Hui,et al.  Chirped Lidar Using Simplified Homodyne Detection , 2009, Journal of Lightwave Technology.

[35]  C. Kiemle,et al.  Airborne remote sensing of tropospheric water vapor with a near-infrared differential absorption lidar system. , 1993, Applied optics.

[36]  K. Shepherd,et al.  Development of Reflectance Spectral Libraries for Characterization of Soil Properties , 2002 .

[37]  D. J. Leu,et al.  Visible and near — infrared reflectance of beach sands: A study on the spectral reflectance/ grain size relationship , 1977 .

[38]  Jingwei Wu,et al.  Prediction of Soil Moisture Content and Soil Salt Concentration from Hyperspectral Laboratory and Field Data , 2016, Remote. Sens..

[39]  R Hui,et al.  Frequency-modulated continuous-wave lidar using I/Q modulator for simplified heterodyne detection. , 2012, Optics letters.

[40]  S. Houweling,et al.  Space-borne remote sensing of CO2, CH4, and N2O by integrated path differential absorption lidar: a sensitivity analysis , 2008 .

[41]  A. Nehrir,et al.  WATER VAPOR PROFILING USING A COMPACT WIDELY TUNABLE DIODE LASER DIFFERENTIAL ABSORPTION LIDAR (DIAL) , 2008 .

[42]  D. Lobell,et al.  Moisture effects on soil reflectance , 2002 .

[43]  A. Godard,et al.  Progress on high energy optical parametric transmitter for multiple greenhouse gases dial , 2017, International Conference on Space Optics.

[44]  Eyal Ben-Dor,et al.  Near-Infrared Analysis as a Rapid Method to Simultaneously Evaluate Several Soil Properties , 1995 .

[45]  C. Karlsson,et al.  Linearization of the frequency sweep of a frequency-modulated continuous-wave semiconductor laser radar and the resulting ranging performance. , 1999, Applied optics.

[46]  W B Grant,et al.  Effect of differential spectral reflectance on DIAL measurements using topographic targets. , 1982, Applied optics.

[47]  Alex B. McBratney,et al.  Diffuse reflectance spectrometry as a proximal sensing tool for precision agriculture , 2001 .

[48]  Kevin S. Repasky,et al.  Advances in Diode-Laser-Based Water Vapor Differential Absorption Lidar , 2016 .

[49]  H. Kaufmann,et al.  Surface soil moisture quantification models from reflectance data under field conditions , 2008 .

[50]  Xingfa Gu,et al.  Evaluation of methods for soil surface moisture estimation from reflectance data , 2003 .

[51]  Diego F. Pierrottet,et al.  Development of an All-Fiber Coherent Laser Radar for Precision Range and Velocity Measurements , 2005 .

[52]  W. R. Whalley,et al.  Estimation of soil moisture status using near infrared reflectance , 1991 .

[53]  Gerhard Ehret,et al.  The airborne multi-wavelength water vapor differential absorption lidar WALES: system design and performance , 2009 .

[54]  Z. Barber,et al.  Accuracy of active chirp linearization for broadband frequency modulated continuous wave ladar. , 2010, Applied optics.

[55]  Kevin S Repasky,et al.  Micropulse water vapor differential absorption lidar: transmitter design and performance. , 2012, Optics express.

[56]  S. Fabre,et al.  Influence of soil moisture content on spectral reflectance of bare soils in the 0.4–14 μm domain , 2013 .

[57]  V. Wulfmeyer,et al.  Ground-based differential absorption lidar for water-vapor and temperature profiling: development and specifications of a high-performance laser transmitter. , 1998, Applied optics.

[58]  A. Jelalian.  Laser radar systems , 1980 .

[59]  Amin R. Nehrir,et al.  Development of an eye-safe diode-laser-based micro-pulse differential absorption lidar (mp-DIAL) for atmospheric water-vapor and aerosol studies , 2011 .

[60]  Tom Ayers,et al.  Preliminary measurements with an automated compact differential absorption lidar for the profiling of water vapor. , 2004, Applied optics.

[61]  C. Hurburgh,et al.  Near-Infrared Reflectance Spectroscopy–Principal Components Regression Analyses of Soil Properties , 2001 .

[62]  Masakatsu Nakajima,et al.  Ground-based demonstration of a CO 2 remote sensor using a 1.57μm differential laser absorption spectrometer with direct detection , 2010 .

[63]  A. Ångström.  The Albedo of Various Surfaces of Ground , 1925 .

[64]  C. Walther,et al.  Future performance of ground-based and airborne water-vapor differential absorption lidar. I. Overview and theory. , 2001, Applied optics.

[65]  M. Greve,et al.  The Effects of Moisture Conditions—From Wet to Hyper dry—On Visible Near-Infrared Spectra of Danish Reference Soils , 2014 .

[66]  E. Remsberg,et al.  Analysis of differential absorption lidar from the space shuttle. , 1978, Applied optics.

[67]  Farzin Amzajerdian,et al.  Linear FMCW Laser Radar for Precision Range and Vector Velocity Measurements , 2008 .

[68]  H. Ramon,et al.  On-line measurement of some selected soil properties using a VIS–NIR sensor , 2007 .

[69]  Matthew Hayman,et al.  Field-deployable diode-laser-based differential absorption lidar (DIAL) for profiling water vapor , 2014 .

[70]  L. Kou,et al.  Refractive indices of water and ice in the 0.65- to 2.5-µm spectral range. , 1993, Applied optics.

[71]  Michael E. Schaepman,et al.  Remote Sensing of Soils , 2015 .

[72]  Sivaprasad Gogineni,et al.  Performance of a 1319 nm laser radar using RF pulse compression , 2001, IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217).

[73]  E. R. Polovtseva,et al.  The HITRAN2012 molecular spectroscopic database , 2013 .

[74]  Toshikazu Itabe,et al.  Airborne remote sensing measurements with a pulsed CO2 DIAL system , 1983 .

[75]  Freek D. van der Meer,et al.  Quantifying engineering parameters of expansive soils from their reflectance spectra , 2009 .

[76]  J. Bösenberg,et al.  Ground-based differential absorption lidar for water-vapor profiling: assessment of accuracy, resolution, and meteorological applications. , 1998, Applied optics.

[77]  E. Browell,et al.  Airborne and spaceborne lidar measurements of water vapor profiles: a sensitivity analysis. , 1989, Applied optics.

[78]  Narasimha S. Prasad,et al.  Remote sensing of propane and methane by means of a differential absorption lidar by topographic reflection , 1996 .

[79]  K. Sudduth,et al.  Soil moisture and organic matter prediction of surface and subsurface soils using an NIR soil sensor , 2001 .

[80]  A. Poortinga,et al.  Measuring and Modeling the Effect of Surface Moisture on the Spectral Reflectance of Coastal Beach Sand , 2014, PloS one.

[81]  S. Ustin,et al.  Predicting water content using Gaussian model on soil spectra , 2004 .

[82]  Cyrus D. Garner.  Development of a Multiband Remote Sensing System for Determination of Unsaturated Soil Properties , 2017 .