List of Publications

Peer Reviewed Papers

  1. Bhogapurapu N., Dey S., Bhattacharya A, Lopez-Martrinez C., Hajnsek I., Rao Y.S. "Soil Permittivity Estimation Over Croplands Using Full and Compact Polarimetric SAR Data,"IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,, Vol.60 :, 2022, pp.4415917
  2. Bhogapurapu N., Dey S., Mandal D., Bhattacharya A., Lanka K., Mc Nairn M., Rao Y.S "Soil Moisture Retrieval Over Croplands Using dual-pol L-band GRD SAR Data,"Remote Sensing of Environment, Vol.271 :, 2022, pp.112900
  3. Bhogapurapu N., Dey S., Homayoouni S., Bhattacharya A., Rao Y.S. "Field-Scale Soil Moisture Estimation Using Sentinel-1 GRD SAR Data," Advances in Space Research,Vol.70 :, 2022, pp.3845-3858,
  4. Bhogapurapu N., Dey S., Bhattacharya A., Mandal D., Lopez-Sanchez J.M., McNairn H., Lopez-Martinez C., Rao Y.S "Dual-polarimetric descriptors from Sentinel-1 GRD SAR data for crop growth assessment,"ISPRS Journal of Photogrammetry and Remote Sensing, Vol.178 :, 2021, pp.20-35,,
  5. Bhogapurapu N., Dey S., Bhattacharya A., Rao Y.S. "PolSAR tools: A QGIS plugin for generating SAR descriptors," Journal of Open Source Software ,Vol.6 57:2970, 2021, pp.1-3
  6. Dey S., Bhattacharya A., Ratha D., Mandal D., McNairn H., Lopez-Sanchez J.M., Rao Y.S. "Novel Clustering Schemes for Full and Compact Polarimetric SAR Data: An Application for Rice Phenology Characterization,"ISPRS Journal of Photogrammetry and Remote Sensing, Vol.169 :, 2020, pp.135-151,,
  7. Kumar, V., Mandal D., Bhattacharya A., Rao Y.S. "Crop characterization using an improved scattering power decomposition technique for compact polarimetric SAR data,"International Journal of Applied Earth Observation and Geoinformation , Vol.88 :102052, 2020, pp.1-10,
  8. Vanama, V.S.K., Mandal D., and Rao, Y.S., "GEE4FLOOD: rapid mapping of flood areas using temporal Sentinel-1 SAR images with Google Earth Engine cloud platform,"Journal of Applied Remote Sensing , Vol.14 3:034505, 2020, pp.1-23
  9. Dey, S., Mandal, D., Dingle Robertson, L., Banerjee, B., Kumar, V., McNairn, H., Bhattacharya, A., Rao, Y. S. "In-Season Crop Classification Using Elements of the Kennaugh Matrix Derived from Polarimetric RADARSAT-2 SAR Data," International Journal of Applied Earth Observations and Geoinformation,Vol.88 102059:, 2020, pp.1-11
  10. Mandal, D., Kumar, V., Ratha, D., Lopez-Sanchez, J. M., Bhattacharya, A., McNairn, H., Rao, Y. S. "Assessment of Rice Growth Conditions in a Semi-arid Region of India Using a Novel Radar Vegetation Index Derived from RADARSAT-2 Polarimetric SAR Data,"Remote Sensing of Environment,Vol.237 111561:, 2020, pp.1-15,
  11. Mandal, D., Kumar, V., McNairn, H., Bhattacharya, A., Lopez-Sanchez, J. M., Rao, Y. S. "Crop Biophysical Parameter Retrieval from Sentinel-1 SAR Data with a multitarget Inversion Technique,"International Journal of Remote Sensing, Vol.41 14:, 2020, pp.5503-5524
  12. Mandal, D., Ratha, D., Bhattacharya, A., Kumar, V., McNairn, H., Rao, Y. S., Frery, A. C. "A Radar Vegetation Index for Crop Monitoring Using Compact Polarimetric SAR Data"IEEE Transactions on Geoscience and Remote Sensing, Vol.58:, 2020, pp.6321-6335,
  13. Mandal, D., Kumar, V., Ratha, D., Dey, S., Bhattacharya, A., Lopez-Sanchez, J. M., McNairn, H., Rao, Y. S. "Dual Polarimetric Radar Vegetation Index for Crop Growth Monitoring Using Sentinel-1 SAR Data,"Remote Sensing of Environment, Vol.247 111954:, 2020, pp.1-17
  14. Mandal D., Hosseini M., McNairn H., Kumar V., Bhattacharya A., Rao Y. S., Mitchell S., Dingle Robertson L., Davidson A., Dabrowska-Zielinska K. (2019), An Investigation of Inversion Methodologies to Retrieve the Leaf Area Index of Corn from C-Band SAR 95 Data,International Journal of Applied Earth Observations and Geoinformation, Elsevier, 2019, 82: 101893. DOI: 10.1016/j.jag.2019.06.003
  15. Mandal D., Kumar V., McNairn H., Bhattacharya A., and Rao Y. S (2019), Joint Estimation of Plant Area Index (PAI) and Wet biomass in Wheat and Soybean from C-band Polarimetric SAR Data, International Journal of Applied Earth Observations and Geoinformation, Vol. 79, pp. 24-34. DOI: 10.1016/j.jag.2019.02.007
  16. Vineet Kumar, Y. S. Rao, Avik Bhattacharya and S. Cloude, 2019, Classification assessment of real versus simulated compact and Qual-pol modes of ALOS-2, IEEE Geosci. Remote Sens. Letters, pp.1497-1501.
  17. Mandal D., V. Kumar, A. Bhattacharya, Y. S. Rao, P. Siqueira and S. Bera "Sen4Rice: A Processing Chain for Differentiating Early and Late Transplanted Rice Using Time-Series Sentinel-1 SAR Data With Google Earth Engine,"IEEE Geoscience and Remote Sensing Letters, Vol.15 12:, 2018, pp.1947-1951.
  18. Cloude S.R. David G. Goodenough, Hao Chen, Yalamanchili S. Rao, Wen Hong "Pauli Phase Calibration in Compact Polarimetry," IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing,Vol.11 12:, 2018, pp. 4906-4917.
  19. Vineet Kumar, Heather McNairn, Avik Bhattacharya, Y. S. Rao, Temporal response of crop type to transmitted ellipticity in compact-pol SAR data, IEEE Journal of selected topics in applied earth observations and remote sensing, 2017
  20. G.G. Ponnurangam and Y.S.Rao, Evaluation of different orientation angle distributions within the X-Bragg scattering model for bare soil moisture estimation, Int. J. Remote Sensing, vol. 38, pp.4379-4395, 2017
  21. G.G.Ponnurangam, T. Jagdhuber, I. Hajnsek and Y.S.Rao, Soil moisture estimation using hybrid polarimetric SAR data of RISAT-1, IEEE Trans. Geosci. and Remote Sensing,Vol. 54, pp.2033-2049, 2016
  22. Rinki Deo, C. Rossi, M. Eineder, T. Fritz, and Y. S. Rao. Framework for Fusion of Ascending and Descending Pass TanDEM-X Raw DEMs, IEEE J. Sel. Topics Appl. Earth Observ. Remote Sensing, Vol. 7, pp.3347-3355, 2015
  23. Y. S. Rao, Rinki Deo, J. Nalini, Abhijit M Pillai, S. Muralikrishnan and V. K. Dadhwal. Quality assessment of TanDEM-X DEMs using airborne LiDAR, photogrammetry and ICESat elevation data. ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume II-8, 187-192, 2014. DOI: 10.5194/isprsannals-II-8-187-2014
  24. Varsha Turkar, Rinki Deo, Y.S.Rao, Shiv Mohan, Anup Das, Classification accuracy of multi-frequency and multi-polarization SAR images for various land covers, IEEE Journal of Applied Earth Observation and Remote Sensing, Vol. 5, No. 3, pp. 936-942, 2012.
  25. Rao Y. S., Synthetic Aperture Radar (SAR) Interferometry for Glacier Movement Studies, Encyclopedia of snow, ice and glaciers, Springer, pp.1133-1142,2011.
  26. Rao K. S.. Y.S. Rao . H.K. Al Jassar, A Study on the Polarimetric Properties of Various Features using SIR-C Data, J. Indian Society of Remote Sens. 36:pp123-136, 2008.
  27. Rao K.S., Y.S.Rao, H.K. Al Jassar, Retrieval of soil moisture using SIR-C polarimetric data, J. Indian Society of Remote Sensing, 36, pp.109-122, 2008.
  28. Gulab Singh, Kumar V., Venkataraman G, Rao Y.S. and Snehmani, Snow porosity estimation using advanced synthetic aperture radar single look complex data analysis and its effects on backscattering coefficient, J. Applied Remote Sensing, Vol. 1, 013522 (23 July 2007)
  29. Rao K.S., Al-Jassar H.K., Phalke S., Rao Y.S., Muller J.P., and Li Z., A study on the applicability of repeat-pass SAR interferometry for generating DEMs over several Indian test sites,International J. of Remote Sensing, 27, 595-616, 2006.
  30. K.S.Rao and Y.S. Rao, Advances in microwave remote sensing towards agricultural applications, NNRMS Bulletin, India, No-2, pp. 46-60 Jan. 1997.
  31. Rao K.S., Y.S. Rao and J.R. Wang, Frequency dependence of polarization phase difference and polarization index for vegetation covered fields using polarimetric, Int. J. Remote Sensing, Vol. 16, No. 18, pp. 3605-3617, Dec. 1995.
  32. Ijjas G. and Y.S. Rao, Microwave Remote Sensing of Soil Moisture from Aircraft in Hungary, Int. J. of Remote Sensing, 13, 471-479, 1992.
  33. Rao K.S., P.V. Narasimha Rao, Y.S. Rao, Girish Chandra, C. Suresh Raju and M.V. Bapat, (1988), A study on the effect of the soil texture on passive microwave remote sensing, J. Indian Soc. Remote Sens., Vol. 16, No.3 pp. 55-63.

    Papers in Proceedings

  1. Ponnurangam G. G., Y. S. Rao, Shiv Mohan and Anup Das. .Soil moisture estimation using fully polarimetric RADARSAT-2 data., presented at Geomatrix.12 held at IIT Bombay during Feb 26 - 29, 2012.
  2. Ponnurangam G. G., and Y. S. Rao, .Soil moisture mapping using fully polarimetric SAR data., presented at symposium of ISRS held at Bhopal during Nov 9-11, 2011
  3. Rao Y.S., Chandrakant Ojha and Rinki, Persistence Scatterer interferometry for surface movement mapping over Himalayan region, Proc. Asia-Pacific conference on SAR, Seoul, Korea, Sept. 26-30, 2011, pp. 610-613.
  4. Ponnurangam G.G., and Y.S. Rao, Soil moisture mapping using ALOS PALSAR and ENVISAT ASAR data over India, Proc. Asia-Pacific conference on SAR, Seoul, Korea, Sept.26-30, 2011, pp.606-609.
  5. Varsha Turkar, Rinki Deo, S. Hariharan and Y.S. Rao, Comparison of classification accuracy between fully polarimetric and dual-polarimetric SAR images, Proc. IGARSS 2011, Vancouver July 24-29 2011, pp.440-443, 2011.
  6. Deepika Rani Gopu, Rinki Deo and Y. S. Rao, Synthetic Aperture Radar Signal Processing using MATLAB for Educational use, presented during the symposium of ISRS held at Lonavala during Dec. 1-3, 2010.
  7. S Hariharan Kalpagam and Y. S. Rao, Classification of SAR Images using different Polarization and Frequency Combinations, presented during the symposium of ISRS held at Lonavala during Dec. 1-3, 2010.
  8. Chandrakant Ojha and Y.S. Rao, Analysis of Aqua AMSR-E L3-Daily Soil Moisture Product for Flood Mapping over Andhra Pradesh and Karnataka Test Areas, presented during the symposium of ISRS held at Lonavala during Dec. 1-3, 2010.
  9. Varsha Turkar and Y.S. Rao (2011), Classification of SIR-C and ALOS PALSAR data using artificial neural network, Geomatrix-11 conference, held at IIT, Bombay, Feb. 26-27, 2011.
  10. Varsha Turkar and Y. S. Rao, Effect of different target decomposition techniques on classification accuracy for polarimetric SAR data, International conference ICTSM.11 organised by NMIMS, Parle, Mumbai held during 25-27th 2011.
  11. Varsha Turkar and Y.S. Rao, Analysis of multi-frequency SIR-C data over India, International conference ICWET 2011 organised by TCET, Kandivili (E), Mumbai 25-27th 2011.
  12. Rao. Y. S. and. A. Chaudhari (2009), Analysis of 7 years aqua AMSR-E derived soil moisture data over India, Proc. IGARSS 2009 (IEEE Geosci. & RS society), Cape Town, July 13-17, 2009, Vol-III, page 486-489.
  13. Rao Y.S. and varsha turkar (2009), Classification of polarimetric sar data over wet and arid regions of India, IGARSS 2009, Capet Town, July 13-17, 2009,Vol-III, page 892-895.
  14. Vijaya Kumar, G. Venkataraman, Y. S. Rao, SAR interferometry and speckle tracking approach for glacier velocity Estimation using ers-1/2 and terrasar-x spotlight high resolution data, Proc. IGARSS 2009, Capet Town, July 13-17, 2009, Page: Vol-
  15. Rao, Y.S. Analsysis of Aqua AMSR-E L-3 Daily soil moisture product for soil moisture and flood mapping over Indian test areas, paper presented in symposium of Indian Society of Remote Sensing (ISRS), held at Nirma Univeristy Campus, Ahmedabad, Dec. 18-20, 2008.
  16. Rao Y.S. Rao, Free software for InSAR and DInSAR studies, paper presented i in symposium of Indian Society of Remote Sensing (ISRS), held at Nirma Univeristy Campus, Ahmedabad, Dec. 18-20, 2008.
  17. Rao, Y.S., Gulab Singh and G. Venkataraman (2008), Soil moisture mapping using ALOS PALSAR Quad-pol data, Proc. of Int. Conference on Microwave 08, held at Jaipur during Nov. 21-14, 2008, pp.214-216.
  18. Varsha Turkar and Y. S. Rao, (2008), Classification of polarimetric synthetic aperture radar images from SIR-C and ALOS PALSAR, Proc. of Int. Conference on Microwave 08, held at Jaipur during Nov. 21-14, 2008, pp. 438-440.
  19. Rao, Y.S., G. Singh, G. Venkataraman and Snehmani (2008), Application of SAR interferometry for DEM generation and movement studies over Himalayna glaciers, Proc. Natioanl Snow Science Workshop 2008 (NSSW-08), held during 11-12 Jan. 2008, pp.210-217.
  20. Rao, Y.S., V. Kumar, Gulab Singh, G. Venkataraman and Snehmani (2008), The loss of coherence in the InSAR images of Himalayan Glaciers, Proceedings of international workshop on Snow, Ice, Glacier and Avalanches, held at IIT Bombay during Jan. 7-9, 2008, pp.232-239.
  21. Rao, Y.S., A.K. Singh, S. Sharma and G. Venkataraman,i (2007), ENVISAT ASAR Polarimetric Data for soil moisture mapping, PolInSAR workshop 2007, held at Frascati, Italy, 2007.http://earth.esa.int/workshops/polinsar2007/papers/113_rao.pdf
  22. Rao, Y.S. and Sonika Sharma (2006), Monitoring of flood over Gujarat region using AQUA AMSR-E derived surface soil moisture, SPIE Vol. 6412, 641208 (Dec. 12, 2006)
  23. Rao, Y.S., G. Venkataraman and G. Singh (2006), ENVISAT-ASAR data analysis for snow cover mapping over Gangotri region, Proc. SPIE Vol. 6410, 641007 (Dec. 7, 2006)
  24. Gulab Singh, Vijay Kumar, Kishor Mohite, G. Venkataraman, Y. S. Rao, and Snehmani, Snow wetness estimation in Himalayan snow covered regions using ENVISAT-ASAR data, Proc. SPIE Vol. 6410, 641008 (Dec. 9, 2006).
  25. Rao, Y.S., S. Sharma, V. Garg and G. Venkataraman (2006), Soil Moisture Mapping over India using Aqua AMSR-E derived Soil Moisutre Product, Proc. IGARSS 2006, pp. 2999-3002, Denver, CO, USA.
  26. V. Kumar, Y.S. Rao, G. Venkataraman, R.N. Sarwade and Snehmani (2006), Analysis of Aqua AMSR-E derived Snow Water Equivalent over Himalayan Snow Covered Regions, Proc. IGARSS 2006,pp.702-705, Denver, CO, USA.
  27. Alpana Sharma and Y.S. Rao, Educational Application of BAM, Iran Earthquake Data th ENVISAT ASAR data sets through InSAR and DInSAR Techniques, Presented in ISRS symposium, held at Jaipur during Nov. 3-5, 2004.(best poster award was received).
  28. Rao Y.S., G.Venkataraman, K.S. Rao, and A. Snehmani, SAR Interferometry for DEM generation and movement of Indian Glaciers, Proc. of IGARSS 2004, pp. 1128-1131, Vol2, Alaska, USA, 2004.
  29. Rao Y.S., G. Venkataraman, K.S. Rao, Snehmani and P. Mathur, Application of Differntial SAR Interferometry for the movement of Gangotri and Siachen Glaciers, presented in the International Symposium on Snow Monitoring and Avalanches, held at Manali, India, during 16-16 April, 2004
  30. Narvekar P.S., Y.S. Rao, K.S. Rao and G. Venkataraman, Brightness Temperature (TB) Data Analysis from Advanced Microwave Scanning Radiometer (AMSR-E) onboard Aqua Satellite for Snow Cover Mapping, presented in the International Symposium on Snow Monitoring and Avalanches, held at Manali, India, during 16-16 April, 2004. (second best poster award was given).
  31. Ryan M. and Y.S. Rao, PC Based Raw Data Processor for Interferometric SAR Applications, presented in 1st Int. Conference on Microwaves, antenna, propagation and Remote Sensing, held at Jodhpur, India, 15-19 Dec. 2003.
  32. Rao Y.S., Comparison of Software for InSAR Applicatoins, presented in Fringe 2003 workshop, held at Frascati, Italy, Dec.1-5, 2003.
  33. Rao Y.S. and K.S. Rao, Comparison of DEMs derived from InSAR and IRS-1C optical stereo techniques, presented in Fringe 2003 workshop, held at Frascati, Italy, Dec.1-5, 2003. http://earth.esa.int/workshops/fringe03/participants/287/ paper_ysrao_comp_dems_full_paper.pdf.
  34. Rao Y.S. Comparison of foreign and Indian satellite data distribution systems and requirement for NRSA Viewer, Proc. 13th User Interactoin Meet, NRSA Data Centre, Hyderabad, Feb. 26-27, 2003.
  35. Rao Y.S., K.S. Rao, M. Khare and A. Kaushal, Comparison of optical stereo and InSAR derived DEMs, Proc. of "Advances in Microwave Symposium" held in CSRE, IIT, Bombay during Jan. 21-23, 2003.
  36. Mahato B.C., Ahok Kumar, Y.S. Rao, G. Venkataraman, and Snehmani, SAR Data Analysis for mapping Beaskund Glacier, Proc. of National Symposium on Remote Sensing and GIS, held at CSRE, IIT, Bombay during Dec. 5-7, 2001
  37. Rao K.S., Y.S. Rao, D. Jayanand and Prithviraj, Field Experimetns Synchronous with SRTM flights, Proc. IGARSS 2001 (CD-ROM) held in Sydney, Australia, July 9-13, 2001.
  38. Rao, K.S., Y.S. Rao, J. Kannan and B.S. Pani, Application of Remote Sensing for Bhuj Earthquake, Proc. Recent Earthquakes of Chamoli and Bhuj, pp. 217-224, held in Agra,May 24-26, 2001
  39. Rao Y.S., K.S. Rao, G. Venkatarama, Application of SAR Interferometry to Himalayan glaciers for DEM generation and movement studies, Proc. Remote Sensing and Mountain meteoreology, held in Manali during Nov. 2000.
  40. Rao K.S., Y.S. Rao, C. Rama Prabha, G. Venkataraman and M.V. Khire, Differential InSAR Research at IIT Bombay - Simulation Experiments Synchronous with ERS 1/2 Tandem Passes, Proc. of Fringe'99, held at Leige, Belgium, Nov.10-12, 1999. http://earth.esa.int/pub/ESA_DOC/fringe1999/Papers/rao.pdf
  41. Rao K.S. and Y.S. Rao and SAR Interferometry for topography and glacier movement, Proc. of National snow science workshop (NSSW) proceedings, will be published soon, (workshop was held at Manali during 29-30, Oct. 1999).
  42. Rao K.S., Y.S. Rao and R.K. Midha, Indian SAR interferometry research and educational programs, will appear in proceeding of 2nd International symposium on Operatinalisation of Remote Sensing, held at ITC, Netherlands, August 16 - 20, 1999. http://www.itc.nl/symposia/index.html
  43. Rao K.S. and Y.S. Rao, SAR Interferometry and Glaciology Applications, Proc. of Snow, Ice and Glaciers - A Himalayan Perceptive symposium, held at Lucknow, March 9-11, 1999
  44. Rao Y.S. and K.S. Rao, Comparison of models for soil moisture estimation using SIR-C data, presented in ISPRS symposium held in Nov.24-25, 1997 at Hyderabad, India.
  45. Rao, K.S. and Y.S. Rao, Soil moisture estimation using SIR-C data: A case study over Bhavnagar test site, India. Presented in IGARSS'97 symposium, Singapore, August 4-8, 1997.
  46. Rao K.S. and Y.S. Rao, Field experiments synchronous with ERS-1 and 2 tandem mission for the simulation of neotechtonic movement, Proc. 3rd ERS-1 symposium, held at Florence, 17-20 March, ESA SP-414, Vol. 1, pp. 429-433,1997.
  47. Rao Y.S., K.S. Rao, Decomposition of Stokes matrix of SIR-C data into odd, even and depolarization components, Presented in the Symposium of Indian Society of Remote Sensing, held at Pune, India, December 4-6, 1996.
  48. Rao Y.S. and K.S. Rao, Study of vegetation through polarization phase difference using SIR-C data, presented in the Symposium of Indian Society of Remote Sensing, held at Pune, India, December 4-6, 1996.
  49. Rao Y.S. and K.S. Rao, Polarimetric signatures of various land features over Gujarat test site using SIR-C data, Presented in the Indo-US Symposium held at IIT, Bombay, October 6-9, 1996.
  50. Jai S. Sukhatme, V. Walavalkhar, Y.S. Rao, G.Venkataraman, M.V. Khire and K.S. Rao, Development of SAR Interferometry at IIT, Bombay, India, Proc. of IGARSS'96 symposium held at Lincoln, Nebraska, USA, during 27-31 May 1996r, Vol. 1, pp.430-433.
  51. Rao K.S., Y.S. Rao, L. Venkataratnam and P.V.N. Rao, Potential of SIR-C data to study vegetation over Gujarat test site, Proc. of IGARSS'96 symposium held at Lincoln, Nebraska, USA, during 27-31 May 1996, Vol. 1, pp.201-203.
  52. Rao Y.S., P.V.N. Rao, L. Venkataratnam and K.S. Rao, ERS-1 and JERS-1 SAR data analysis for soil moisture and vegetation, Proc. of IGARSS'96 symposium held at Lincoln, Nebraska, USA, during 27-31 May 1996, Vol. 1, pp.163-165,
  53. K.S Rao and Y.S. Rao, The potential of JERS-1 L-band SAR data to discriminate soil moisture levels and vegetation types, Proc. of Results repor- ting meeting of JERS-1 system verification program, held in Tokyo during Nov. 29-Dec. 1, 1994, Vol 2. pp.46-54.
  54. Rao K.S., Y.S. Rao and G. Ijjas, Soil moisture estimation from multifrequency microwave radiometer data based on statistical inversion technique, Proc.ESA/ NASA International Workshop, held at Saint Lary, France, pp.475- 484, VSP 1994.
  55. Rao Y.S., K.S. Rao, M. Jafrullah, B.K. Mohan and M.V. Khire, Combined use of Intera X-band SAR, ERS-1 SAR and IRS-1A data for agricultural applications, Proc. National Symposium on Microwave Remote Sensing and Users'meet, Ahmedabad, India, pp. 161-166, Jan. 1994.
  56. Rao K.S., Y.S. Rao and M.V. Khire, Polarimetric AIRSAR data analysis for soil moisture mapping, Presented in the Symposium of Indian Society of society of Remote Sensing, Nov. 25-27, 1993, Guwahati, India.
  57. Rao K.S., Y.S. Rao and J.R. Wang, Frequency dependence of polarization phase difference and polarization index for vegetation covered fields using polari- metric AIRSAR data, Proc. IGARSS '93 symposium, held in Tokyo, Japan, August 1993. Vol. 1, pp. 37-39.
  58. Ijjas G., Y.S. Rao, F. Horcher, Z. Vargai and L. Aujeszky, Soil moisture estimation using truck-mounted L-, S-, and thermal-infrared radiometers and different theoretical models, Proc. 11 th EARSeL Symposium, July 1991, pp. 216-223.
  59. Rao K.S., Suresh Raju and Y.S. Rao, Model for the retrieval of soil moisture and surface roughness parameters from multifrequency backscattering coefficients, Proc. of IGARSS '91, symposium, Espoo, Finland, 397-400, 1991.
  60. Ijjas G., K.S. Rao and Y.S. Rao, Efficiency of 1.4 and 2.7 GHz radiometers data for the retrieval of soil moisture profile, Proc. of IGARSS symposium held at Espoo, Finland during June 3-6, 1991, 765-768, 1991.