Prof. Irina Gladkova Profile

Prof. Irina Gladkova

Associate Professor at City College of New York

SPIE Involvement:

Author

Publications (32)

Proceedings Article | 30 May 2022 Presentation + Paper

Towards global daily gridded super-collated SST product from low earth orbiting satellites (L3S-LEO-Daily) at NOAA

Olafur Jonasson, Irina Gladkova, Alexander Ignatov

Proceedings Volume 12118, 1211805 (2022) https://doi.org/10.1117/12.2620103

KEYWORDS: Satellites, Defense and security, Shortwaves, Clouds, Satellite communications, Meteorological satellites, Stars, Sensors, Data modeling, Data archive systems

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Proceedings Article | 30 May 2022 Presentation + Paper

Analysis of ABI bands and regressors in the ACSPO GEO NLSST algorithm

Irina Gladkova, Alexander Ignatov, Alexander Semenov

Proceedings Volume 12118, 1211804 (2022) https://doi.org/10.1117/12.2620058

KEYWORDS: Absorption, Sensors, Satellites, Visualization, Satellite imaging, Performance modeling, Long wavelength infrared, Lead, Imaging systems, Clouds

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Proceedings Article | 25 May 2021 Presentation + Paper

Algorithmic improvements and consistency checks of the NOAA global gridded super-collated SSTs from low Earth orbiting satellites (L3S-LEO)

Olafur Jonasson, Irina Gladkova, Alexander Ignatov, Yury Kihai

Proceedings Volume 11752, 1175202 (2021) https://doi.org/10.1117/12.2585819

KEYWORDS: Sensors, Stars, Satellites, Quality systems, Prototyping, Earth observing sensors, Clouds

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Proceedings Article | 12 April 2021 Presentation

Towards super-collated gridded ACSPO SST product from multiple geostationary satellites (L3S-GEO)

Lars Hunger, Alexander Ignatov, Irina Gladkova, Yury Kihai, Olafur Jonasson

Proceedings Volume 11752, 1175203 (2021) https://doi.org/10.1117/12.2585821

KEYWORDS: Satellites, Imaging systems, Data modeling, Temporal resolution, Sensors, Satellite imaging

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Proceedings Article | 25 June 2020 Presentation + Paper

Progress with development of global gridded super-collated SST products from low Earth orbiting satellites (L3S-LEO) at NOAA

Olafur Jonasson, Irina Gladkova, Alexander Ignatov, Yury Kihai

Proceedings Volume 11420, 1142002 (2020) https://doi.org/10.1117/12.2551819

KEYWORDS: Laser Doppler velocimetry

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Proceedings Article | 30 May 2019 Presentation + Paper

Mitigation of the GOES-17 ABI performance issues in the NOAA ACSPO SST products

Matthew Pennybacker, Alexander Ignatov, Olafur Jonasson, Irina Gladkova, Boris Petrenko, Yury Kihai

Proceedings Volume 11014, 110140Q (2019) https://doi.org/10.1117/12.2521051

KEYWORDS: Calibration, Satellites, Sensors, Imaging systems, Switches, Data archive systems, Infrared imaging, Satellite imaging, Temperature metrology, Thermography

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GOES-17 (G17), the second satellite in the NOAA GOES-R series with a new Advanced Baseline Imager (ABI) radiometer onboard, was launched in Mar’2018 and declared the NOAA operational GOES-West satellite in Feb’2019. Sea Surface Temperature (SST) is one of the key geophysical products derived from ABI brightness temperatures (BTs) using the NOAA Advanced Clear-Sky Processor for Ocean (ACSPO) enterprise SST system.

Following the launch of G17, an issue was discovered with its ABI loop heat pipe (LHP) that should maintain the ABI electronics (and in particular, Focal Plane Module, FPM) at their intended temperatures. There are two main implications. During normal operations, the G17 FPM temperature is elevated compared to the specifications (and compared to the ABI twin sensor onboard G16, which has been the NOAA operational GOES-East satellite since Dec’2017), leading to overall noisier BTs. During nighttime, especially in some seasons, when more sunlight impinges directly on the G17 ABI, its FPM temperature is elevated even further and becomes very unstable, resulting in increased noise and degraded ABI calibration (due to increased and band-specific emission from the focal plane itself), rendering measured BTs completely unusable for SST retrievals.

The increased noise of the G17 ABI instrument necessitates changes in the ACSPO clear-sky mask (in particular, its spatial uniformity test), and in the collation-in-time algorithm introduced in ACSPO v2.60 for G16. When the ABI temperature is further elevated, its BTs in the longwave IR bands remain biased (although the calibration algorithm is expected to account for changes in the instrument temperature). When the temperature is near its maximum values, they saturate. The collation-in-time algorithm can partially fill in the periods of saturation, while the remaining biases may potentially be addressed empirically. We discuss the challenges imposed by the G17 ABI LHP and resulting BT anomalies, and our progress with mitigating those in the ACSPO SST products at NOAA. Future plans include tweaking ACSPO algorithms, to generate the best possible SST out of G17 BT data, reprocessing of G17 SST data, archival of data with the NASA/JPL Physical Oceanography Distributed Active Archive Center (PO.DAAC) and NOAA NCEI, and work with users to iteratively improve the processing algorithms and derived SST products.

Proceedings Article | 14 May 2019 Presentation

ACSPO collated-in-time geostationary SST from GOES-16/17 and Himawari-8 (Conference Presentation)

Matthew Pennybacker, Irina Gladkova, Olafur Jonasson, Alexander Ignatov, Yury Kihai

Proceedings Volume 11014, 110140M (2019) https://doi.org/10.1117/12.2518537

KEYWORDS: Sensors, Imaging systems, Temporal resolution, Infrared sensors, Infrared imaging, Infrared radiation, Image resolution, Image processing, Clouds

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Proceedings Article | 10 May 2019 Presentation + Paper

Towards high-resolution multi-sensor gridded ACSPO SST product: reducing residual cloud contamination

Irina Gladkova, Alexander Ignatov, Matthew Pennybacker, Yury Kihai

Proceedings Volume 11014, 110140L (2019) https://doi.org/10.1117/12.2518462

KEYWORDS: Composites, Spatial resolution, Satellite imaging

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Sea Surface Temperature (SST) products at NOAA are produced from multiple polar-orbiting and geostationary sensors using the Advanced Clear-Sky Processor for Ocean (ACSPO) enterprise system. Data of several high-resolution (~1 km) sensors onboard US and EUMETSAT polar-orbiting platforms are processed, including two VIIRSs (onboard NPP and N20), three AVHRR FRAC (onboard Metop-A, -B, and -C), and two MODISs (onboard Terra and Aqua). L1b data of each platform/sensor are processed independently, and two SST products generated: swath (L2P) and 0.02° mapped equal-grid L3U. All L2P and L3U are consistently reported in 10-min granules in a Group for High-Resolution SST (GHRSST) Data Specification Version 2 (GDS2) format, and assimilated in several gridded gap-free L4 analyses, which reconcile data from individual platforms, sensors and overpasses, and fill in cloud obscured regions by optimal interpolation. The L4 feature resolution is degraded, compared to input L2P/3U, with no measure provided of this degradation or identification which grids contain clear-sky observations versus those created by estimation (modeling). There is currently no global SST product based on real observations from all available platforms/sensors, without modeled data. As a result, users either have to rely on L4 products (without knowing what data come from real observations versus those modeled, and how much the satellite data have been smoothed), or deal with huge and ever growing data volumes from multiple L2P/3U data files, and learn how to fuse/aggregate those, themselves. In response to multiple users’ requests, NOAA started developing a new multi-sensor, high-resolution, sensor-agnostic gridded L3 SST product, with no modeled data added, which maximally preserves the original sensors’ resolution. In creating such collated and super-collated (L3C/S) products, several issues must be addressed, including minimizing the effect of residual cloud leakages, which are always present in the L2P/3U data, on the L3C/S product, while maximally preserving the feature-resolution present in the original satellite imagery. This aspect of data fusion is the focus of this study.

Proceedings Article | 14 May 2018 Presentation

Virtual true-color imagery for advanced baseline imager (Conference Presentation)

Irina Gladkova, Michael Grossberg, Don Hillger

Proceedings Volume 10644, 1064417 (2018) https://doi.org/10.1117/12.2304509

KEYWORDS: Imaging systems, Satellite imaging, Satellites, Sensors, RGB color model, Meteorology, Statistical analysis

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SPIE Journal Paper | 16 May 2017

JPSS VIIRS level 3 uncollated sea surface temperature product at NOAA

Alexander Ignatov, Irina Gladkova, Yanni Ding, Fazlul Shahriar, Yury Kihai, Xinjia Zhou

JARS, Vol. 11, Issue 03, 032405, (May 2017) https://doi.org/10.1117/12.10.1117/1.JRS.11.032405

KEYWORDS: Satellite imaging, Satellites, Visible radiation, Infrared imaging, Infrared radiation, Radiometry, Sensors, Statistical analysis, Signal to noise ratio, Digital filtering

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Proceedings Article | 19 September 2016 Paper

Integrated approach using multi-platform sensors for enhanced high-resolution daily ice cover product

George Bonev, Irina Gladkova, Michael Grossberg, Peter Romanov, Sean Helfrich

Proceedings Volume 9972, 997213 (2016) https://doi.org/10.1117/12.2244976

KEYWORDS: Clouds, Microwave radiation, Imaging systems, MODIS, Satellites, Algorithm development, Satellite imaging, Sensors, Earth observing sensors, Ocean optics

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Proceedings Article | 23 May 2014 Paper

Exploring pattern recognition enhancements to ACSPO clear-sky mask for VIIRS: potential and limitations

Irina Gladkova, Yury Kihai, Alexander Ignatov, Fazlul Shahriar, Boris Petrenko

Proceedings Volume 9111, 91110G (2014) https://doi.org/10.1117/12.2053474

KEYWORDS: Clouds, Image segmentation, Detection and tracking algorithms, Pattern recognition, Satellites, Sensors, Binary data, Visualization, Satellite imaging, Image processing algorithms and systems

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SPIE Journal Paper | 27 November 2013

Statistical estimation of a 13.3 μm Visible Infrared Imaging Radiometer Suite channel using multisensor data fusion

James Cross, Irina Gladkova, W. Paul Menzel, Andrew Heidinger, Michael Grossberg

JARS, Vol. 7, Issue 01, 073473, (November 2013) https://doi.org/10.1117/12.10.1117/1.JRS.7.073473

KEYWORDS: MODIS, Statistical analysis, Infrared imaging, Visible radiation, Spectral resolution, Radiometry, Satellites, Spatial resolution, Infrared radiation, Clouds

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Proceedings Article | 14 September 2011 Paper

Graphyte software for integrated remote sensing research using HPCC

Michael Grossberg, Joesan Gabaldon, Paul Alabi, Jeremy Neiman, Irina Gladkova

Proceedings Volume 8153, 81531F (2011) https://doi.org/10.1117/12.894064

KEYWORDS: Remote sensing, Computing systems, Clouds, Data storage, Visualization, Software development, Computer programming, Telecommunications, Analytical research, MATLAB

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Proceedings Article | 14 September 2011 Paper

Virtual green band for GOES-R

Irina Gladkova, Fazlul Shahriar, Michael Grossberg, George Bonev, Donald Hillger, Steve Miller

Proceedings Volume 8153, 81531C (2011) https://doi.org/10.1117/12.893660

KEYWORDS: Data modeling, Near infrared, Sensors, MODIS, RGB color model, Reflectivity, Visualization, Statistical analysis, Remote sensing, Clouds

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Proceedings Article | 20 May 2011 Paper

A multiband statistical restoration of the Aqua MODIS 1.6 micron band

Irina Gladkova, Michael Grossberg, George Bonev, Fazlul Shahriar

Proceedings Volume 8048, 804819 (2011) https://doi.org/10.1117/12.883439

KEYWORDS: Sensors, MODIS, Detection and tracking algorithms, Algorithm development, Fourier transforms, Error analysis, Clouds, Reflectivity, Satellites, Data analysis

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Proceedings Article | 20 May 2011 Paper

Estimating true color imagery for GOES-R

Michael Grossberg, Fazlul Shahriar, Irina Gladkova, Paul Alabi, Donald Hillger, Steven Miller

Proceedings Volume 8048, 80481A (2011) https://doi.org/10.1117/12.884020

KEYWORDS: Data modeling, RGB color model, Imaging systems, Satellite imaging, Satellites, Visible radiation, Visualization, Algorithm development, CIE 1931 color space, Image analysis

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Proceedings Article | 13 May 2010 Paper

Quantitative image restoration

Irina Gladkova, Michael Grossberg, Fazlul Shahriar

Proceedings Volume 7695, 769519 (2010) https://doi.org/10.1117/12.851731

KEYWORDS: Sensors, Image restoration, Clouds, MODIS, Detection and tracking algorithms, Imaging systems, Image processing, Statistical analysis, Solids, Image sensors

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Proceedings Article | 20 April 2010 Paper

Characterizing bio-optical and ecological features of algal bloom waters for detection and tracking from space

S. Ahmed, R. Amin, I. Gladkova, A. Gilerson, M. Grossberg, S. Hlaing, F. Shariar, P. Alabi

Proceedings Volume 7678, 767804 (2010) https://doi.org/10.1117/12.852444

KEYWORDS: Luminescence, Satellites, Scattering, MODIS, Reflectivity, Backscatter, Databases, Sensors, Earth observing sensors, Detection and tracking algorithms

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Proceedings Article | 3 September 2009 Paper

Error mitigation for CCSD compressed imager data

Irina Gladkova, Michael Grossberg, Srikanth Gottipati, Fazlul Shahriar, George Bonev

Proceedings Volume 7444, 744408 (2009) https://doi.org/10.1117/12.826361

KEYWORDS: Imaging systems, Image restoration, Image compression, Statistical analysis, Infrared imaging, Error analysis, Visible radiation, Sensors, Satellites, Multispectral imaging

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Proceedings Article | 12 August 2009 Paper

Rich client data exploration and research prototyping for NOAA

Michael Grossberg, Irina Gladkova, Ingrid Guch, Paul Alabi, Fazlul Shahriar, George Bonev, Hannah Aizenman

Proceedings Volume 7456, 74560C (2009) https://doi.org/10.1117/12.826523

KEYWORDS: Data modeling, Expectation maximization algorithms, Image segmentation, Satellites, Human-machine interfaces, Data archive systems, Visualization, Clouds, Computing systems, MODIS

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Proceedings Article | 27 April 2009 Paper

A comparative study of lossless compression algorithms on multispectral imager data

Michael Grossberg, Srikanth Gottipati, Irina Gladkova, Malka Rabinowitz, Paul Alabi, Tence George, Amnia Pacheco

Proceedings Volume 7334, 733408 (2009) https://doi.org/10.1117/12.821007

KEYWORDS: MODIS, Image compression, Imaging systems, Satellites, Satellite imaging, Multispectral imaging, Sensors, JPEG2000, Infrared imaging, Algorithm development

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This paper reports a comparative study of current lossless compression algorithms for data from a representative selection of satellite based earth science multispectral imagers. The study includes the performance of compression algorithms on Advanced Very High Resolution Radiometer(AVHRR), SEVIRI, the Moderate Resolution Imaging Spectroradiometer(MODIS) imager, as well as a subset of MODIS bands as a proxy for the upcoming GOES-R series. SEVIRI aboard the ESA/EUMETSAT operated Meteosat Second Generation (MSG) satellites is a geostationary imager. The AVHRR aboard the NOAA Polar Orbiting Environmental Satellites and MODIS aboard the NASA Terra and Aqua satellites have polar orbits. Thus this study will present representatives from both polar and geostationary orbiting imagers. The imagers we include have sensors for both reflected and emissive radiance. We also note that the older satellites have coarser quantizations and present our conclusions on the impact on compression ratios. Faced with a enormous growing large volume of data on a new emerging current generation images from faster scanning, finer spatial resolution, and greater spectral resolution, this study provides a comparison of current compression algorithms as a baseline for future work. With growing satellite Earth science multispectral imager volume data, it becomes increasingly important to evaluate which compression algorithms are most appropriate for data management in transmission and archiving. This comparative compression study uses a wide range standard implementations of the leading lossless compression algorithms. Examples include image compression algorithms such as PNG and JPEG2000, and widely-used file compression formats such as BZIP2 and 7z. This study includes a comparison with the Consultative Committee for Space Data Systems (CCSDS) recommended Szip software which uses the extended-Rice lossless compression algorithm as well as the most recent recommended compression standard which relies on a wavelet transform followed by an entropy coder. To establish statistical significance of our analysis, we have developed a system to acquire and manage a large number of imager granules: currently over 1000 MODIS granules, over 2400 AVHRR granules, and over 220 SEVIRI granules.

Proceedings Article | 5 September 2008 Paper

An analysis of the information dependence between MODIS emissive bands

Srikanth Gottipati, Irina Gladkova, Michael Grossberg

Proceedings Volume 7084, 70840J (2008) https://doi.org/10.1117/12.800817

KEYWORDS: MODIS, Clouds, Image compression, Analytical research, Sensors, Data compression, Data modeling, Matrices, Imaging systems, JPEG2000

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Multispectral, hyperspectral and ultraspectral imagers and sounders are increasingly important for atmospheric science and weather forecasting. The recent advent of multipsectral and hyperspectral sensors measuring radiances in the emissive IR are providing valuable new information. This is due to the presence of spectral channels (in some cases micro-channels) which are carefully positioned in and out of absorption lines of CO2, ozone, and water vapor. These spectral bands are used for measuring surface/cloud temperature, atmospheric temperature, Cirrus clouds water vapor, cloud properties/ozone, and cloud top altidude etc. The complexity of the spectral structure wherein the emissive bands have been selected presents challenges for lossless data compression; these are qualitatively different than the challenges offered by the reflective bands. For a hyperspectral sounder such as AIRS, the large number of channels is the principal contributor to data size. We have shown that methods combining clustering and linear models in the spectral channels can be effective for lossless data compression. However, when the number of emissive channels is relatively small compared to the spatial resolution, such as with the 17 emissive channels of MODIS, such techniques are not effective. In previous work the CCNY-NOAA compression group has reported an algorithm which addresses this case by sequential prediction of the spatial image. While that algorithm demonstrated an improved compression ratio over pure JPEG2000 compression, it underperformed optimal compression ratios estimated from entropy. In order to effectively exploit the redundant information in a progressive prediction scheme we must, determine a sequence of bands in which each band has sufficient mutual information with the next band, so that it predicts it well. We will provide a covariance and mutual information based analysis of the pairwise dependence between the bands and compare this with the qualitative expected dependence suggested by a physical analysis. This compression research is managed by Roger Heymann, PE of OSD NOAA NESDIS Engineering, in collaboration with the NOAA NESDIS STAR Research Office through Mitch Goldberg, Tim Schmit, Walter Wolf.

Proceedings Article | 5 September 2008 Paper

Lossless compression algorithm for multispectral imagers

Irina Gladkova, Michael Grossberg, Srikanth Gottipati

Proceedings Volume 7084, 70840D (2008) https://doi.org/10.1117/12.800819

KEYWORDS: Image compression, Imaging systems, JPEG2000, MODIS, Multispectral imaging, Algorithm development, Computer programming, Satellites, Data archive systems, Satellite imaging

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Multispectral imaging is becoming an increasingly important tool for monitoring the earth and its environment from space borne and airborne platforms. Multispectral imaging data consists of visible and IR measurements from a scene across space and spectrum. Growing data rates resulting from faster scanning and finer spatial and spectral resolution makes compression an increasingly critical tool to reduce data volume for transmission and archiving. Research for NOAA NESDIS has been directed to finding for the characteristics of satellite atmospheric Earth science Imager sensor data what level of Lossless compression ratio can be obtained as well as appropriate types of mathematics and approaches that can lead to approaching this data's entropy level. Conventional lossless do not achieve the theoretical limits for lossless compression on imager data as estimated from the Shannon entropy. In a previous paper, the authors introduce a lossless compression algorithm developed for MODIS as a proxy for future NOAA-NESDIS satellite based Earth science multispectral imagers such as GOES-R. The algorithm is based on capturing spectral correlations using spectral prediction, and spatial correlations with a linear transform encoder. In decompression, the algorithm uses a statistically computed look up table to iteratively predict each channel from a channel decompressed in the previous iteration. In this paper we present a new approach which fundamentally differs from our prior work. In this new approach, instead of having a single predictor for each pair of bands we introduce a piecewise spatially varying predictor which significantly improves the compression results. Our new algorithm also now optimizes the sequence of channels we use for prediction. Our results are evaluated by comparison with a state of the art wavelet based image compression scheme, Jpeg2000. We present results on the 14 channel subset of the MODIS imager, which serves as a proxy for the GOES-R imager. We will also show results of the algorithm for on NOAA AVHRR data and data from SEVIRI. The algorithm is designed to be adapted to the wide range of multispectral imagers and should facilitate distribution of data throughout globally. This compression research is managed by Roger Heymann, PE of OSD NOAA NESDIS Engineering, in collaboration with the NOAA NESDIS STAR Research Office through Mitch Goldberg, Tim Schmit, Walter Wolf.

Proceedings Article | 19 September 2007 Paper

A new lossless compression algorithm for satellite earth science multi-spectral imagers

Irina Gladkova, Srikanth Gottipati, Michael Grossberg

Proceedings Volume 6683, 668307 (2007) https://doi.org/10.1117/12.736584

KEYWORDS: Image compression, Imaging systems, Sensors, MODIS, Satellites, Algorithm development, JPEG2000, Image processing, Satellite imaging, Earth sciences

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Proceedings Article | 19 September 2007 Paper

A comparative study of lossless compression algorithms on MODIS data

Srikanth Gottipati, Jamal Goddard, Michael Grossberg, Irina Gladkova

Proceedings Volume 6683, 66830F (2007) https://doi.org/10.1117/12.736771

KEYWORDS: JPEG2000, MODIS, Image compression, Imaging systems, Data archive systems, Satellites, Satellite imaging, Data compression, Reflectivity, Algorithm development

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Proceedings Article | 19 September 2007 Paper

The impact of striping artifacts on compression

Michael Grossberg, Srikanth Gottipati, Irina Gladkova

Proceedings Volume 6683, 66830L (2007) https://doi.org/10.1117/12.736585

KEYWORDS: Sensors, Image compression, Image sensors, MODIS, Image processing, Calibration, Satellites, Long wavelength infrared, Satellite imaging, Imaging systems

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Proceedings Article | 1 September 2006 Paper

An analysis of optimal compression for the advanced baseline imager based on entropy and noise estimation

M. Grossberg, S. Gottipati, I. Gladkova, M. Goldberg, L. Roytman

Proceedings Volume 6300, 63000M (2006) https://doi.org/10.1117/12.681487

KEYWORDS: Imaging systems, Data modeling, Image compression, Sensors, Statistical analysis, Algorithm development, Expectation maximization algorithms, Data compression, Satellites, Data analysis

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Proceedings Article | 1 September 2006 Paper

A lossless compression algorithm for hyperspectral data

I. Gladkova, M. Grossberg

Proceedings Volume 6300, 630001 (2006) https://doi.org/10.1117/12.682830

KEYWORDS: Principal component analysis, Data modeling, Satellites, Data compression, Stochastic processes, Visualization, Hyperspectral imaging, Computer programming, Algorithm development, Image compression

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Proceedings Article | 1 September 2006 Paper

Priority-based error correction using turbo codes for compressed AIRS data

I. Gladkova, M. Grossberg, E. Grayver, D. Olsen, N. Nalli, W. Wolf, L. Zhou, M. Goldberg

Proceedings Volume 6300, 630008 (2006) https://doi.org/10.1117/12.679851

KEYWORDS: Forward error correction, Satellites, Data modeling, Ozone, Data compression, Computer programming, Infrared radiation, Atmospheric propagation, Calibration, Signal to noise ratio

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Proceedings Article | 18 August 2005 Paper

Adaptive clustering for hyperspectral sounder data compression

I. Gladkova, L. Roytman, M. Goldberg

Proceedings Volume 5889, 588907 (2005) https://doi.org/10.1117/12.618085

KEYWORDS: Data compression, Satellites, Principal component analysis, Visualization, Algorithm development, Space operations, Data conversion, Image segmentation, Statistical analysis, Infrared spectroscopy

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Proceedings Article | 14 October 2004 Paper

Compression of AIRS data using Emperical Mode Decomposition

Irina Gladkova, Leonid Roytman, Mitchell Goldberg, John Weber

Proceedings Volume 5548, (2004) https://doi.org/10.1117/12.558967

KEYWORDS: Data compression, Image compression, Modulation, Statistical analysis, Data analysis, Satellites, Space operations, Visualization, Algorithm development, Device simulation

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