Dr. Sriharsha Madhavan Profile

Dr. Sriharsha Madhavan

Lead Research Scientist at SSAI

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Author

Publications (27)

Proceedings Article | 5 September 2017 Presentation + Paper

Crosstalk effect and its mitigation in Aqua MODIS middle wave infrared bands

Junqiang Sun, S. Madhavan, Menghua Wang

Proceedings Volume 10402, 104020N (2017) https://doi.org/10.1117/12.2273015

KEYWORDS: MODIS, Mid-IR, Infrared radiation, Infrared imaging, Algorithm development, Contamination, Long wavelength infrared, Photovoltaics, Space operations, Short wave infrared radiation

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The MODerate-resolution Imaging Spectroradiometer (MODIS) is one of the primary instruments in the National Aeronautics and Space Administration (NASA) Earth Observing System (EOS). The first MODIS instrument was launched in December 1999 on-board the Terra spacecraft. A follow on MODIS was launched on an afternoon orbit in 2002 and is aboard the Aqua spacecraft. Both MODIS instruments are very akin, has 36 bands, among which bands 20 to 25 are Middle Wave Infrared (MWIR) bands covering a wavelength range from approximately 3.750 μm to 4.515 μm. It was found that there was severe contamination in these bands early in mission but the effect has not been characterized and mitigated at the time. The crosstalk effect induces strong striping in the Earth View (EV) images and causes significant retrieval errors in the EV Brightness Temperature (BT) in these bands. An algorithm using a linear approximation derived from on-orbit lunar observations has been developed to correct the crosstalk effect and successfully applied to mitigate the effect in both Terra and Aqua MODIS Long Wave Infrared (LWIR) Photovoltaic (PV) bands. In this paper, the crosstalk effect in the Aqua MWIR bands is investigated and characterized by deriving the crosstalk coefficients using the scheduled Aqua MODIS lunar observations for the MWIR bands. It is shown that there are strong crosstalk contaminations among the five MWIR bands and they also have significant crosstalk contaminations from Short Wave Infrared (SWIR) bands. The crosstalk correction algorithm previously developed is applied to correct the crosstalk effect in these bands. It is demonstrated that the crosstalk correction successfully reduces the striping in the EV images and improves the accuracy of the EV BT in the five bands as was done similarly for LWIR PV bands. The crosstalk correction algorithm should thus be applied to improve both the image quality and radiometric accuracy of the Aqua MODIS MWIR bands Level 1B (L1B) products.

Proceedings Article | 19 September 2016 Presentation + Paper

Crosstalk effect and its mitigation in thermal emissive bands of remote sensors

J. Sun, S. Madhavan, M. Wang

Proceedings Volume 9972, 99720Y (2016) https://doi.org/10.1117/12.2237010

KEYWORDS: Algorithm development, MODIS, Calibration, Remote sensing, Sensors, Electronic circuits, Satellites, Long wavelength infrared, Detection and tracking algorithms, Signal detection

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Proceedings Article | 19 September 2016 Presentation + Paper

Improvement in the cloud mask for Terra MODIS mitigated by electronic crosstalk correction in the 6.7 µm and 8.5 µm channels

Junqiang Sun, S. Madhavan, M. Wang

Proceedings Volume 9972, 99720Z (2016) https://doi.org/10.1117/12.2237013

KEYWORDS: Clouds, MODIS, Thermography, Infrared radiation, Sensors, Space operations, Reflectivity, Radiometry, Contamination, Long wavelength infrared

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Proceedings Article | 2 May 2016 Paper

MODIS on-orbit thermal emissive bands lifetime performance

Sriharsha Madhavan, Aisheng Wu, Na Chen, Xiaoxiong Xiong

Proceedings Volume 9881, 98811X (2016) https://doi.org/10.1117/12.2222310

KEYWORDS: MODIS, Calibration, Sensors, Black bodies, Temperature metrology, Sensor calibration, Imaging systems, Space operations, Thermography, Infrared radiation, Long wavelength infrared, Electronics

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Proceedings Article | 12 October 2015 Paper

Evaluation of VIIRS and MODIS thermal emissive band calibration consistency using Dome C

Sriharsha Madhavan, Aisheng Wu, Jake Brinkmann, Brian Wenny, Xiaoxiong Xiong

Proceedings Volume 9639, 963913 (2015) https://doi.org/10.1117/12.2196389

KEYWORDS: MODIS, Calibration, Domes, Sensors, Temperature metrology, Black bodies, Visible radiation, Infrared imaging, Radiometry

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Proceedings Article | 11 September 2015 Paper

Electronic crosstalk in Terra MODIS thermal emissive bands

Junqiang Sun, Sriharsha Madhavan, Xiaoxiong Xiong, Menghua Wang

Proceedings Volume 9607, 96070V (2015) https://doi.org/10.1117/12.2188171

KEYWORDS: Sensors, MODIS, Long wavelength infrared, Calibration, Algorithm development, Photovoltaics, Contamination, Solids, Image quality, Infrared radiation

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Proceedings Article | 8 September 2015 Paper

Implementation of electronic crosstalk correction for terra MODIS PV LWIR bands

Xu Geng, Sriharsha Madhavan, Na Chen, Xiaoxiong Xiong

Proceedings Volume 9607, 960725 (2015) https://doi.org/10.1117/12.2185961

KEYWORDS: Sensors, MODIS, Calibration, Long wavelength infrared, Photovoltaics, Infrared radiation, Image processing, Mirrors, Diffusers, Electronic components

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Proceedings Article | 8 September 2015 Paper

Electronic crosstalk characterization of Terra MODIS long wave infrared channels

Sriharsha Madhavan, Xiaoxiong Xiong, Junqiang Sun, Kwofu Chiang, Aisheng Wu

Proceedings Volume 9607, 96070W (2015) https://doi.org/10.1117/12.2185960

KEYWORDS: Sensors, Long wavelength infrared, MODIS, Domes, Calibration, Photovoltaics, Infrared radiation, Staring arrays, Clouds, Thermography

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Proceedings Article | 2 December 2014 Paper

Adjusting Aqua MODIS TEB nonlinear calibration coefficients using iterative solution

Aisheng Wu, Zhipeng Wang, Yonghong Li, Sriharsha Madhavan, Brian Wenny, Na Chen, Xiaoxiong Xiong

Proceedings Volume 9264, 92640R (2014) https://doi.org/10.1117/12.2069246

KEYWORDS: MODIS, Calibration, Sensors, Satellites, Temperature metrology, Black bodies, Infrared radiation, Domes, Curium, Mirrors

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Proceedings Article | 19 November 2014 Paper

Electronic crosstalk correction for terra long wave infrared photovoltaic bands

Junqiang Sun, Sriharsha Madhavan, Xiaoxiong Xiong, Menghua Wang

Proceedings Volume 9264, 926412 (2014) https://doi.org/10.1117/12.2069028

KEYWORDS: Sensors, MODIS, Long wavelength infrared, Photovoltaics, Calibration, Algorithm development, Contamination, Infrared photography, Infrared radiation, Solids

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Proceedings Article | 3 October 2014 Paper

Statistical analysis of the electronic crosstalk correction in Terra MODIS Band 27

Sriharsha Madhavan, Junqiang Sun, Xiaoxiong Xiong, Brian Wenny, Aisheng Wu

Proceedings Volume 9218, 921824 (2014) https://doi.org/10.1117/12.2060718

KEYWORDS: MODIS, Sensors, Statistical analysis, Calibration, Linear filtering, Long wavelength infrared, Spatial filters, Space operations, Reflectivity, Photovoltaics

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The first MODerate-resolution Imaging Spectroradiometer (MODIS), also known as the Proto-Flight model (PFM), is on-board the Terra spacecraft and has completed 14 years of on orbit flight as of December 18, 2013. MODIS remotely senses the Earth in 36 spectral bands, with a wavelength range from 0.4 μm to 14.4 μm. The 36 bands can be subdivided into two groups based on their spectral responsivity as Reflective Solar Bands (RSBs) and Thermal Emissive Bands (TEBs). Band 27 centered at 6.77 μm is a TEB used to study the global water vapor distribution. It was found recently that this band has been severely affected by electronic crosstalk. The electronic crosstalk magnitude, its on-orbit change and calibration impact have been well characterized in our previous studies through the use of regularly scheduled lunar observations. Further, the crosstalk correction was implemented in Earth view (EV) images and quantified the improvements of the same. However, improvements remained desirable on several fronts. Firstly, the effectiveness of the correction needed to be analyzed spatially and radiometrically over a number of scenes. Also, the temporal aspect of the correction had to be investigated in a rigorous manner. In order to address these issues, a one-orbit analysis was performed on the Level 1A (L1A) scene granules over a ten year period from 2003 through 2012. Results have been quantified statistically and show a significant reduction of image striping, as well as removal of leaked signal features from the neighboring bands. Statistical analysis was performed by analyzing histograms of the one-orbit granules at a scene and detector level before and after correction. The comprehensive analysis and results reported in this paper will be very helpful to the scientific community in understanding the impacts of crosstalk correction on various scenes and could potentially be applied for future improvements of band 27 calibration and, therefore, its retrieval for the Level 2 (L2) geophysical parameters.

Proceedings Article | 2 October 2014 Paper

Evaluation of Terra and Aqua MODIS thermal emissive band response versus scan angle

B. Wenny, A. Wu, S. Madhavan, X. Xiong

Proceedings Volume 9218, 92181L (2014) https://doi.org/10.1117/12.2060728

KEYWORDS: MODIS, Mirrors, Domes, Calibration, Sensors, Clouds, Atmospheric sensing, Space operations, Temperature metrology, Temperature sensors

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Proceedings Article | 2 October 2014 Paper

Status of Terra MODIS operation, calibration, and performance

Xiaoxiong Xiong, Brian Wenny, Aisheng Wu, Amit Angal, Xu Geng, Hongda Chen, Jennifer Dodd, Daniel Link, Sriharsha Madhavan, Na Chen, Yonghong Li, Sean Iacangelo, William Barnes, Vince Salomonson

Proceedings Volume 9218, 92180O (2014) https://doi.org/10.1117/12.2062645

KEYWORDS: MODIS, Calibration, Sensors, Long wavelength infrared, Space operations, Mirrors, Diffusers, Electronics, Signal to noise ratio, Near infrared

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Proceedings Article | 16 October 2013 Paper

Status of MODIS on-orbit calibration and characterization

X. Xiong, B. Wenny, J. Sun, A. Angal, A. Wu, H. Chen, X. Geng, T. Choi, S. Madhavan, D. Link, W. Barnes, Vincent Salomonson

Proceedings Volume 8889, 88890U (2013) https://doi.org/10.1117/12.2028953

KEYWORDS: MODIS, Calibration, Sensors, Staring arrays, Long wavelength infrared, Mirrors, Space operations, Sensor calibration, Near infrared, Neodymium

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Proceedings Article | 23 September 2013 Paper

On-orbit radiometric stability assessment of MODIS thermal emissive bands with lunar observation

Zhipeng Wang, Xiaoxiong (Jack) Xiong, Hongda Chen, Sriharsha Madhavan

Proceedings Volume 8866, 886604 (2013) https://doi.org/10.1117/12.2024101

KEYWORDS: MODIS, Sensors, Calibration, Reflectivity, Black bodies, Staring arrays, Sun, Long wavelength infrared, Photovoltaics, Mercury cadmium telluride

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Proceedings Article | 3 June 2013 Paper

Long-term band-to-band calibration stability of MODIS thermal emissive bands

B. Wenny, X. Xiong, S. Madhavan, A. Wu, Y. Li

Proceedings Volume 8724, 872412 (2013) https://doi.org/10.1117/12.2016659

KEYWORDS: MODIS, Calibration, Sensors, Temperature metrology, Clouds, Domes, Atmospheric sciences, Satellites, Aerospace engineering, Space operations

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SPIE Journal Paper | 22 May 2013

Terra and Aqua moderate-resolution imaging spectroradiometer collection 6 level 1B algorithm

Gary Toller, Xiaoxiong Xiong, Junqiang Sun, Brian Wenny, Xu Geng, James Kuyper, Amit Angal, Hongda Chen, Sriharsha Madhavan, Aisheng Wu

JARS, Vol. 7, Issue 01, 073557, (May 2013) https://doi.org/10.1117/12.10.1117/1.JRS.7.073557

KEYWORDS: MODIS, Calibration, Sensors, Reflectivity, Long wavelength infrared, Staring arrays, Data acquisition, Detection and tracking algorithms, Signal to noise ratio, Atmospheric sciences

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Proceedings Article | 19 November 2012 Paper

Evaluation of Terra and Aqua MODIS thermal emissive band calibration consistency

B. Wenny, X. Xiong, S. Madhavan

Proceedings Volume 8533, 853317 (2012) https://doi.org/10.1117/12.974230

KEYWORDS: MODIS, Calibration, Sensors, Domes, Temperature metrology, Clouds, Earth's atmosphere, Diamond, Satellites, Atmospheric sensing

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Proceedings Article | 19 November 2012 Paper

MODIS TEB calibration approach in collection 6

Brian Wenny, Aisheng Wu, Sriharsha Madhavan, Zhipeng Wang, Yonghong Li, Na Chen, Kwo-Fu Chiang, Xiaoxiong Xiong

Proceedings Volume 8533, 85331M (2012) https://doi.org/10.1117/12.974231

KEYWORDS: Calibration, MODIS, Sensors, Algorithm development, Staring arrays, Mirrors, Long wavelength infrared, Black bodies, Detection and tracking algorithms, Temperature metrology

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Proceedings Article | 19 November 2012 Paper

Overview of Aqua MODIS 10-year on-orbit calibration and performance

X. Xiong, B. Wenny, J. Sun, A. Angal, A. Wu, H. Chen, T. Choi, S. Madhavan, X. Geng, D. Link, Z. Wang, G. Toller, W. Barnes, V. Salomonson

Proceedings Volume 8533, 853316 (2012) https://doi.org/10.1117/12.973769

KEYWORDS: Calibration, MODIS, Sensors, Long wavelength infrared, Staring arrays, Near infrared, Sensor calibration, Reflectivity, Diffusers, Spectral calibration

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Proceedings Article | 19 November 2012 Paper

Comparison of MODIS and VIIRS On-board blackbody Performance

Xiaoxiong Xiong, Jim Butler, Aisheng Wu, Kwofu Chiang, Boryana Efremova, Sriharsha Madhavan, Jeff McIntire, Hassan Oudrari

Proceedings Volume 8533, 853318 (2012) https://doi.org/10.1117/12.977560

KEYWORDS: MODIS, Calibration, Sensors, Black bodies, Temperature metrology, Staring arrays, Space operations, Radiometry, Mirrors

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Proceedings Article | 15 October 2012 Paper

Monitoring and assessment of the temperature fluctuation of Aqua MODIS cold focal plane assembly

Zhipeng Wang, Sriharsha Madhavan, Xiaoxiong Xiong, Aisheng Wu, Brian Wenny

Proceedings Volume 8510, 85100K (2012) https://doi.org/10.1117/12.930904

KEYWORDS: Staring arrays, MODIS, Calibration, Sensors, Long wavelength infrared, Temperature metrology, Photovoltaics, Mercury cadmium telluride, Detection and tracking algorithms, Algorithm development

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Proceedings Article | 15 October 2012 Paper

Analog and digital saturation in the MODIS reflective solar bands

S. Madhavan, A. Angal, J. Dodd, J. Sun, X. Xiong

Proceedings Volume 8510, 85101N (2012) https://doi.org/10.1117/12.929998

KEYWORDS: Sensors, MODIS, Analog electronics, Reflectivity, Algorithm development, Signal to noise ratio, Detection and tracking algorithms, Calibration, Photovoltaics, Mirrors

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Proceedings Article | 3 October 2011 Paper

Terra MODIS band 27 electronic crosstalk: cause, impact, and mitigation

J. Sun, S. Madhavan, B. Wenny, X. Xiong

Proceedings Volume 8176, 81760Z (2011) https://doi.org/10.1117/12.897754

KEYWORDS: Sensors, MODIS, Long wavelength infrared, Calibration, Spatial resolution, Staring arrays, Bismuth, Image quality, Signal detection, Detection and tracking algorithms

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Proceedings Article | 14 October 2010 Paper

Aqua MODIS 8-year on-orbit operation and calibration

Xiaoxiong Xiong, Amit Angal, Sriharsha Madhavan, Taeyoung Choi, Jennifer Dodd, Xu Geng, Zhipeng Wang, Gary Toller, William Barnes

Proceedings Volume 7826, 78261X (2010) https://doi.org/10.1117/12.864172

KEYWORDS: MODIS, Calibration, Sensors, Staring arrays, Near infrared, Long wavelength infrared, Mirrors, Mid-IR, Photovoltaics, Short wave infrared radiation

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Proceedings Article | 28 August 2010 Paper

Characterization of Terra MODIS blackbody uniformity and stability

Xiaoxiong Xiong, Sriharsha Madhavan

Proceedings Volume 7807, 78071E (2010) https://doi.org/10.1117/12.860611

KEYWORDS: MODIS, Calibration, Sensors, Black bodies, Temperature metrology, Diffusers, Detection and tracking algorithms, Mirrors, Earth sciences, Roads

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Proceedings Article | 28 August 2010 Paper

MODIS calibration algorithm improvements developed for Collection 6 Level-1B

Brian Wenny, Junqiang Sun, Xiaoxiong Xiong, Aisheng Wu, Hongda Chen, Amit Angal, Taeyoung Choi, Na Chen, Sriharsha Madhavan, Xu Geng, James Kuyper, Liqin Tan

Proceedings Volume 7807, 78071F (2010) https://doi.org/10.1117/12.860892

KEYWORDS: MODIS, Sensors, Calibration, Algorithm development, Mirrors, Detection and tracking algorithms, Space operations, Temperature metrology, Data processing, Reflectivity

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Showing 5 of 27 publications

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