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{{short description|Microwave remote sensing specialist}}
{{Use dmy dates|date=May 2020}}
{{Use Indian English|date=May 2020}}
{{Infobox scientist
| name = Avik Bhattacharya
| image = Dr.Avik Bhattacharya.jpg
| caption =
| birth_date =
| birth_place = [[Kharagpur]], [[India]]
| citizenship = India
| website = http://www.mrslab.in/Avik/
| fields = [[Remote sensing|Radar remote sensing]]
| workplaces = [[IIT Bombay|Indian Institute of Technology Bombay]] [[Canada Centre for Mapping and Earth Observation|Canadian Centre for Remote Sensing]]
| alma_mater = [[IIT Kharagpur|Indian Institute of Technology Kharagpur]] [[Télécom Paris|Télécom ParisTech]], [[France]] [[INRIA]] [[Sophia Antipolis]], [[France]]
| doctoral_advisor = [[Henri Maître]] [[Josiane Zerubia]]
| known_for = [[Synthetic Aperture Radar|Synthetic Aperture Radar (SAR)]] [[Polarimetry|Radar Polarimetry]] Bio and Geophysical Parameter Estimation
}}

'''Avik Bhattacharya''' (born 1976) is a professor at the [[Centre of Studies in Resources Engineering, IIT Bombay|Centre of Studies in Resources Engineering]], [[Indian Institute of Technology Bombay]],<ref name="avik">{{cite web |title=Avik Bhattacharya |url=http://www.mrslab.in/Avik/ |website=www.mrslab.in}}</ref><ref>{{cite web |title=Faculty {{!}} Center of Studies in Resources Engineering (CSRE), IIT Bombay |url=http://www.csre.iitb.ac.in/faculty.php |website=www.csre.iitb.ac.in}}</ref> Mumbai, India. He has been working in the field of [[Polarimetry|radar polarimetry]] theory and applications for more than a decade. His main focuses on the use of [[Synthetic-aperture radar|synthetic aperture radar]] (SAR) data for land use classification, change detection and qualitative and quantitative biophysical and geophysical information estimation.

==Education==
Bhattacharya received his M.Sc. degree in mathematics from [[Indian Institute of Technology Kharagpur]], [[West Bengal]], India, in 2000, and the Ph.D. degree in ''Indexing of Satellite Images Using Structural Information''<ref>{{cite thesis |last1=Bhattacharya |first1=Avik |title=Indexing of satellite images using structural information |date=14 December 2007 |pages=1–179 |url=https://pastel.hal.science/pastel-00006275 |publisher=Télécom ParisTech |journal=Thèses en ligne de ParisTech|language=en}}</ref> from jointly at the Department of Traitement et Interprétation des Images, [[Télécom Paris|Télécom Paris-Tech]], [[Paris]], [[France]] and [[INRIA]], ARIANA Project Group, [[Sophia Antipolis]], [[France]] in 2007.<ref>{{cite web |title=TélécomParisTech/TSI -- PhD Defense of Avik Bhattacharya |url=http://www.tsi.telecom-paristech.fr/pages/events/the-bhattacharya.html |website=www.tsi.telecom-paristech.fr |publisher=Télécom ParisTech/TSI}}</ref>

== Professional career==
Bhattacharya joined the [[Centre of Studies in Resources Engineering, IIT Bombay|Centre of Studies in Resources Engineering]], [[Indian Institute of Technology Bombay]], in 2011, as an assistant professor.<ref name="avik"/> He has been the principal and co-principal investigator of numerous projects sponsored by the [[Department of Science and Technology (India)|Department of Science and Technology]] (DST), [[Defence Research and Development Organisation|Defense Research and Development Organization]] (DRDO), [[Indian Space Research Organisation|Indian Space Research Organization]] (ISRO) and ''GEOGLAM-JECAM'' SAR Inter-Comparison Experiment.<ref>{{Cite web|url=http://jecam.org/studysite/india-vijayawada/|title=JECAM SAR Inter-Comparison Experiment|last=|first=|date=6 June 2018|website=www.geoglam.org|archive-url=|archive-date=|access-date=}}</ref> He has authored several scientific publications in refereed international journals and conference proceedings

Bhattacharya was the [[editor-in-chief]] of the [[IEEE Geoscience and Remote Sensing Society|''IEEE Geoscience and Remote Sensing Letters'']] (GRSL) (2019-2024).<ref>{{cite web |title=Editor-in-Chief of IEEE Geoscience and Remote Sensing Letters (GRSL) 2019 {{!}} IIT Bombay |url=http://www.iitb.ac.in/en/award/editor-chief-ieee-geoscience-and-remote-sensing-letters-grsl-2019 |website=www.iitb.ac.in}}</ref><ref>{{cite web |title=GRSL Archives |url=http://www.grss-ieee.org/publication-category/grsl/ |website=GRSS {{!}} IEEE {{!}} Geoscience & Remote Sensing Society|date=14 February 2021 }}</ref><ref name="chapters">{{cite web |title=Chapters |url=http://www.grss-ieee.org/community/chapters/ |website=GRSS {{!}} IEEE {{!}} Geoscience & Remote Sensing Society}}</ref><ref>{{Cite web|url=https://ieeexplore.ieee.org/xpl/aboutJournal.jsp?punumber=8859|title=IEEE Geoscience and Remote Sensing Letters (GRSL)|last=|first=|date=|website=|archive-url=|archive-date=|access-date=}}</ref> He is also the founding chairperson of the [[IEEE Geoscience and Remote Sensing Society]] (GRSS) Chapter, Bombay section, India.<ref name="chapters" />

Bhattacharya has also served as a visiting professor at the following institutes:
*LISTIC – [[Polytech'Savoie|Polytech Annecy-Chambéry]], [[Université Savoie-Mont Blanc]], France (2018)<ref>{{cite web |title=ATELIER RECHERCHE ''IMAGERIE RADAR ET CRYOSPHÈRE'' À L'ÉCOLE D'INGÉNIEURS |url=https://www.polytech.univ-smb.fr/en/single-news/observer-la-terre-par-teledetection-avec-le-laboratoire-listic.html |website=www.polytech.univ-smb.fr}}</ref><ref>{{cite web |title=Séminaire Dr. Avik Bhattacharya – jeudi 23 mai 2019 – 13h30 – A126 |url=https://www.listic.univ-smb.fr/seminaire-dr-avik-bhattacharya-jeudi-23-mai-2019-13h30-a126/ |website=LISTIC |language=fr-FR |date=23 May 2019}}</ref>
*Instituto Gulich, [[National University of Córdoba]], Argentina Space Agency [[Comisión Nacional de Actividades Espaciales|(CONAE)]], Argentina, (2018)<ref>{{cite web |title=Remote Sensing Spring School in Argentina – SAR for Environmental and Production Monitoring |url=https://accedacris.ulpgc.es/bitstream/10553/69296/1/Remote%20Sensing%20Spring%20School%20in%20Argentina%20SAR%20for%20Environmental%20and%20Production%20Monitoring.pdf |website=accedacris.ulpgc.es}}</ref>
*Visiting Scientist at the [[Canada Centre for Mapping and Earth Observation|Canadian Centre for Remote Sensing]] Ottawa, ON, Canada (2011)<ref name="ccrs">{{cite web |title=Radar Remote Sensing: Perspectives and Applications |url=https://www.tifr.res.in/~aset/talk122818.html |website=tifr.res.in |publisher=Tata Institute of Fundamental Research (TIFR)}}</ref>

== Major research contributions ==

*'''Stochastic Distance Based Y4O Polarimetric SAR Decomposition (SDY4O)'''
This is a radar polarimetric decomposition technique based on the field of statistical information theory. Here a method is devised to estimate the polarization (OA) orientation angle from the full polarimetric SAR data using the Hellinger distance.<ref name ="summary">{{cite journal |last1=Muhuri |first1=Arnab |last2=De |first2=Shaunak |last3=Manickam |first3=Surendar |last4=Dhingra |first4=Swinky |last5=Hariharan |first5=Siddharth |last6=Maity |first6=Abhishek |last7=Ratha |first7=Debanshu |last8=Bhattacharya |first8=Avik |title=Novel Scattering Power Decomposition Techniques for Full and Compact Polarimetric SAR Data |journal=National Symposium on Recent Advances in Remote Sensing and GIS with Special Emphasis on Mountain Ecosystems & Annual Conventions of Indian Society of Remote Sensing & Indian Society of Geomatics |date=December 7, 2016 |url=https://www.infona.pl/resource/bwmeta1.element.ID-a0689551-94b4-4c0b-b76c-7efb021b6a17 |language=English}}</ref><ref>{{Cite journal|last1=Bhattacharya|first1=Avik|last2=Muhuri|first2=Arnab|last3=De|first3=Shaunak|last4=Manickam|first4=Surendar|last5=Frery|first5=Alejandro C.|date=July 2015|title=Modifying the Yamaguchi Four-Component Decomposition Scattering Powers Using a Stochastic Distance|journal=IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing|volume=8|issue=7|pages=3497–3506|doi=10.1109/jstars.2015.2420683|issn=1939-1404|bibcode=2015IJSTA...8.3497B|arxiv=1504.01000|s2cid=6498352}}</ref>
*'''Adaptive General Four-Component Scattering Power Decomposition'''
In this method, one out of the two types of complex special unitary transformation matrices is identified and chosen
to transform a unitary rotated coherency matrix in real space based on the greatest value of degree of polarization (DOP) commonly termed as adaptive general four-component scattering power decomposition method (AG4U).<ref>{{Cite journal|last1=Bhattacharya|first1=Avik|last2=Singh|first2=Gulab|last3=Manickam|first3=Surendar|last4=Yamaguchi|first4=Yoshio|date=October 2015|title=An Adaptive General Four-Component Scattering Power Decomposition With Unitary Transformation of Coherency Matrix (AG4U)|journal=IEEE Geoscience and Remote Sensing Letters|volume=12|issue=10|pages=2110–2114|doi=10.1109/lgrs.2015.2451369|issn=1545-598X|bibcode=2015IGRSL..12.2110B|s2cid=27146811}}</ref><ref name ="summary"/>
*'''Sen4Rice – A cloud-based SAR processing pipeline with Google Earth Engine'''
Here a framework for monitoring and mapping of rice fields especially from rice cultivation regions of India using time-series of [[Sentinel-1]] data is developed using the [[Google Cloud Platform|Google Earth Engine's cloud]] computing platform.<ref>{{Cite journal|last1=Mandal|first1=Dipankar|last2=Kumar|first2=Vineet|last3=Bhattacharya|first3=Avik|last4=Rao|first4=Yalamanchili Subrahmanyeswara|last5=Siqueira|first5=Paul|last6=Bera|first6=Soumen|date=December 2018|title=Sen4Rice: A Processing Chain for Differentiating Early and Late Transplanted Rice Using Time-Series Sentinel-1 SAR Data With Google Earth Engine|journal=IEEE Geoscience and Remote Sensing Letters|volume=15|issue=12|pages=1947–1951|doi=10.1109/lgrs.2018.2865816|issn=1545-598X|bibcode=2018IGRSL..15.1947M|s2cid=56172393}}</ref>

===Other research===
Other significant research includes development of various methods like relative de-correlation Measure in Polarimetric SAR decomposition,<ref>{{Cite journal|last1=Ratha|first1=D.|last2=Surendar|first2=M.|last3=Bhattacharya|first3=A.|date=2016-12-22|title=Improvement of PolSAR decomposition scattering powers using a relative decorrelation measure|journal=Remote Sensing Letters|volume=8|issue=4|pages=340–349|doi=10.1080/2150704x.2016.1271159|issn=2150-704X|arxiv=1704.06054|s2cid=119349808}}</ref> decomposition algorithm development consisting (S-Ω) and Modified (m-χ) and <ref>{{Cite journal|last1=Bhattacharya|first1=A.|last2=De|first2=S.|last3=Muhuri|first3=A.|last4=Surendar|first4=M.|last5=Venkataraman|first5=G.|last6=Das|first6=A.K.|date=2015-09-25|title=A new compact polarimetric SAR decomposition technique|journal=Remote Sensing Letters|volume=6|issue=12|pages=914–923|doi=10.1080/2150704x.2015.1088669|bibcode=2015RSL.....6..914B |s2cid=124418207|issn=2150-704X}}</ref><ref name ="summary"/> crop monitoring using machine learning.<ref>{{cite web |last1=Subramani |first1=Balaram Vishnu |last2=Raman |first2=Spoorthy |title=Machine learning helps monitor crop growth {{!}} IIT Bombay |url=http://www.iitb.ac.in/en/research-highlight/machine-learning-helps-monitor-crop-growth |website=www.iitb.ac.in}}</ref> In past, Prof. Bhattacharya was also actively involved in study related to snow dynamics in Himalayas involving SAR data from satellites like [[Radarsat-2|RADARSAT-2]].<ref>{{cite journal |last1=Muhuri |first1=Arnab |last2=Manickam |first2=Surendar |last3=Bhattacharya |first3=Avik |title=Scattering Mechanism Based Snow Cover Mapping Using RADARSAT-2 C-Band Polarimetric SAR Data |journal=IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |date=July 2017 |volume=10 |issue=7 |pages=3213–3224 |doi=10.1109/JSTARS.2017.2681719 |bibcode=2017IJSTA..10.3213M |s2cid=23560686 |issn=1939-1404}}</ref>

== Honors and awards ==
* [[IEEE Geoscience and Remote Sensing Society]] Regional Leader Award (2024)<ref>{{cite news |title=IEEE Geoscience and Remote Sensing Society (GRSS)'s Post |url=https://www.linkedin.com/posts/ieee-grss_exciting-wrap-up-of-igarss-2024-it-was-activity-7218990791413616640-E2tF |work=www.linkedin.com |publisher=[[IEEE]] |date=16 July 2024 |language=en}}</ref>
* Australian Government [[Endeavour Awards|Endeavor Executive Fellowship]] Award (2016)<ref>{{cite web |title=2007–2018 Endeavour Scholarship and Fellowship Recipients |url=https://internationaleducation.gov.au/Scholarships/Scholarships-and-Fellowships/2019/Documents/2007-2018%20Endeavour%20Scholarship%20and%20Fellowship%20recipients.pdf |website=www.internationaleducation.gov.au |publisher=The Department of Education, Skills and Employment, Australian Government}}</ref>
* Young Faculty Award, [[Indian Institute of Technology Bombay]] (2011)<ref name="avik"/>
* Visiting Scientist Fellowship at the [[Canada Centre for Remote Sensing]] under ''Canadian National Laboratories'' (2008)<ref name="ccrs"/>

== See also ==
{{Div col|colwidth=30em}}
* [[Polarimetry]]
* [[Synthetic Aperture Radar]]
* [[Remote sensing]]
* [[Interferometric synthetic-aperture radar|Interferometric SAR]]
* [[Satellite crop monitoring]]
* [[Remote sensing (geology)]]
{{div col end}}

==Selected bibliography==
=== Articles ===
*{{cite journal |last1=Bhogapurapu|first1=Narayanarao |last2=Dey|first2=Subhadip|last3=Bhattacharya |first3=Avik |last4=Mandal |first4=Dipankar |last5=Lopez-Sanchez|first5=JM |last6=McNairn|first6=Heather |last7=Lopez-Martinez|first7=Carlos |last8=Rao |first8=Y.S. |title=Dual-polarimetric descriptors from Sentinel-1 GRD SAR data for crop growth assessment. |journal=ISPRS Journal of Photogrammetry and Remote Sensing |date=August 2021 |volume=178 |pages=20–35|doi=10.1016/j.isprsjprs.2021.05.013 |bibcode=2021JPRS..178...20B |hdl=10045/115962 |s2cid=236594150 |hdl-access=free }}
*{{cite journal |last1=Kumar |first1=Vineet |last2=Mandal |first2=Dipankar |last3=Bhattacharya |first3=Avik |last4=Rao |first4=Y.S. |title=Crop characterization using an improved scattering power decomposition technique for compact polarimetric SAR data |journal=International Journal of Applied Earth Observation and Geoinformation |date=June 2020 |volume=88 |article-number=102052 |doi=10.1016/j.jag.2020.102052|bibcode=2020IJAEO..8802052K |ref=none|doi-access=free }}
*{{cite journal |last1=Ratha |first1=Debanshu |last2=Pottier |first2=Eric |last3=Bhattacharya |first3=Avik |last4=Frery |first4=Alejandro C. |title=A PolSAR Scattering Power Factorization Framework and Novel Roll-Invariant Parameter-Based Unsupervised Classification Scheme Using a Geodesic Distance |journal=IEEE Transactions on Geoscience and Remote Sensing |date=May 2020 |volume=58 |issue=5 |pages=3509–3525 |doi=10.1109/TGRS.2019.2957514|bibcode=2020ITGRS..58.3509R |s2cid=195700216 |url=https://figshare.com/articles/journal_contribution/12471650 |ref=none|arxiv=1906.11577 }}
*{{cite journal |last1=De |first1=Shaunak |last2=Bruzzone |first2=Lorenzo |last3=Bhattacharya |first3=Avik |last4=Bovolo |first4=Francesca |last5=Chaudhuri |first5=Subhasis |title=A Novel Technique Based on Deep Learning and a Synthetic Target Database for Classification of Urban Areas in PolSAR Data |journal=IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |date=January 2018 |volume=11 |issue=1 |pages=154–170 |doi=10.1109/JSTARS.2017.2752282|bibcode=2018IJSTA..11..154D |s2cid=29626919 |ref=none}}
*{{cite journal |last1=Muhuri |first1=Arnab |last2=Manickam |first2=Surendar |last3=Bhattacharya |first3=Avik |title=Scattering Mechanism Based Snow Cover Mapping Using RADARSAT-2 C-Band Polarimetric SAR Data |journal=IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |date=July 2017 |volume=10 |issue=7 |pages=3213–3224 |doi=10.1109/JSTARS.2017.2681719|bibcode=2017IJSTA..10.3213M |s2cid=23560686 |ref=none}}

===Books===
*{{cite book |last1=Mandal |first1=Dipankar |last2=Bhattacharya |first2=Avik |last3=Rao |first3=Yalamanchili Subrahmanyeswara |title=Radar Remote Sensing for Crop Biophysical Parameter Estimation |date=2021 |publisher=[[Springer Nature]] |location=Singapore |isbn=978-981-16-4423-8 |pages=XVIII, 236 |url=https://books.google.com/books?id=ISBN9789811644238 |language=en}}

== References ==

{{reflist}}

==External links==
*{{Google Scholar id |RNtSqRgAAAAJ}}

{{Authority control}}

{{DEFAULTSORT:Bhattacharya, Avik}}
[[Category:1976 births]]
[[Category:Living people]]
[[Category:Academic staff of IIT Bombay]]
[[Category:IIT Kharagpur alumni]]
[[Category:Télécom Paris alumni]]
[[Category:Remote sensing professionals]]
[[Category:People from Kharagpur]]

Avik Bhattacharya - Revision history

Tumita7029 at 18:05, 28 January 2026