Dr. Bryan A. Franz Profile

Dr. Bryan A. Franz

at NASA Goddard Space Flight Ctr

SPIE Involvement:

Author

Publications (31)

Proceedings Article | 20 November 2024 Presentation + Paper

Presentation + Paper

Life after launch: a snapshot of the first six months of NASA’s plankton, aerosol, cloud, ocean ecosystem (PACE) mission

P. Jeremy Werdell, Bryan Franz, Carina Poulin, James Allen, Brian Cairns, Skyelar Caplan, Ivona Cetinić, Susanne Craig, Meng Gao, Otto Hasekamp, Amir Ibrahim, Kirk Knobelspiesse, Antonio Mannino, J. Vanderlei Martins, Lachlan McKinna, Gerhard Meister, Frederick Patt, Christopher Proctor, Chamara Rajapakshe, Inia Soto Ramos, Jeroen Rietjens, Andrew Sayer, Emerson Sirk

Proceedings Volume 13192, 131920E (2024) https://doi.org/10.1117/12.3033830

KEYWORDS: Clouds, Aerosols, Radiometric calibration, Radiometry, Polarimetry, Satellites, Ocean optics, Passive remote sensing

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Proceedings Article | 9 September 2019 Presentation + Paper

Presentation + Paper

The NASA OBPG 2020 on-orbit calibration of SNPP VIIRS for ocean color applications

Robert Eplee, Gerhard Meister, Frederick Patt, Kevin Turpie, Sean Bailey, Bryan Franz

Proceedings Volume 11127, 111271A (2019) https://doi.org/10.1117/12.2528769

KEYWORDS: Calibration, Diffusers, Bidirectional reflectance transmission function, Modulation, Sun, Mirrors, Reflectivity, Sensors, Short wave infrared radiation, Remote sensing

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Proceedings Article | 24 October 2018 Paper

Paper

Estimating photosynthetically available radiation at the ocean surface from EPIC/DSCOVR data

Robert Frouin, Jing Tan, Didier Ramon, Bryan Franz, Hiroshi Murakami

Proceedings Volume 10778, 1077806 (2018) https://doi.org/10.1117/12.2501675

KEYWORDS: Sensors, Sun, Atmospheric modeling, MODIS, Reflectivity, Clouds, Aerosols, Ozone, Spatial resolution, Transmittance

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Proceedings Article | 21 September 2017 Presentation

Presentation

Suomi-NPP visible infrared imaging radiometer suite (VIIRS) calibration uncertainty its effect on trends in the ocean color data record (Conference Presentation)

Kevin Turpie, Robert Eplee, Gerhard Meister, Bryan Franz

Proceedings Volume 10402, 104021Z (2017) https://doi.org/10.1117/12.2274385

KEYWORDS: Calibration, Visible radiation, Infrared imaging, Radiometry, Climatology, Satellites, Reflectivity, Instrument modeling, Remote sensing, Uncertainty analysis

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Proceedings Article | 5 September 2017 Presentation + Paper

Presentation + Paper

Advances in the on-orbit calibration of SNPP VIIRS for ocean color applications

Robert Eplee, Kevin Turpie, Gerhard Meister, Frederick Patt, Bryan Franz

Proceedings Volume 10402, 1040220 (2017) https://doi.org/10.1117/12.2273958

KEYWORDS: Calibration, Reflectivity, Satellites, Remote sensing

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Proceedings Article | 8 September 2015 Paper

Paper

Updates to the on-orbit calibration of SNPP VIIRS for ocean color applications

Robert Eplee, Kevin Turpie, Gerhard Meister, Frederick Patt, Bryan Franz

Proceedings Volume 9607, 96071P (2015) https://doi.org/10.1117/12.2185940

KEYWORDS: Calibration, Diffusers, Short wave infrared radiation, Bidirectional reflectance transmission function, Reflectivity, Sun, Near infrared, Space operations, Instrument modeling, Atmospheric corrections

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SPIE Journal Paper | 25 March 2015 Open Access

Open Access

Ocean color measurements with the Operational Land Imager on Landsat-8: implementation and evaluation in SeaDAS

Bryan Franz, Sean Bailey, Norman Kuring, P. Jeremy Werdell

JARS, Vol. 9, Issue 01, 096070, (March 2015) https://doi.org/10.1117/12.10.1117/1.JRS.9.096070

KEYWORDS: Sensors, Atmospheric corrections, Earth observing sensors, Aerosols, Signal to noise ratio, Imaging systems, Calibration, MODIS, Calcium, Landsat

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Proceedings Article | 2 October 2014 Paper

Paper

Corrections to MODIS Terra calibration and polarization trending derived from ocean color products

Gerhard Meister, Robert Eplee, Bryan Franz

Proceedings Volume 9218, 92180V (2014) https://doi.org/10.1117/12.2062714

KEYWORDS: MODIS, Polarization, Calibration, Mirrors, Sensors, Solids, Satellites, Atmospheric modeling, Near infrared, Biology

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Proceedings Article | 23 May 2014 Paper

Paper

Calibration uncertainty in ocean color satellite sensors and trends in long-term environmental records

Kevin Turpie, Robert Eplee, Bryan Franz, Carlos Del Castillo

Proceedings Volume 9111, 911103 (2014) https://doi.org/10.1117/12.2053427

KEYWORDS: Calibration, MODIS, Near infrared, Satellites, Sensors, Environmental sensing, Data modeling, Climatology, Infrared sensors, Monte Carlo methods

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Proceedings Article | 23 September 2013 Paper

Paper

A synthesis of VIIRS solar and lunar calibrations

Robert Eplee, Kevin Turpie, Gerhard Meister, Frederick Patt, Gwyn Fireman, Bryan Franz, Charles McClain

Proceedings Volume 8866, 88661L (2013) https://doi.org/10.1117/12.2024069

KEYWORDS: Calibration, Diffusers, MODIS, Bidirectional reflectance transmission function, Reflectivity, Instrument modeling, Space operations, Data modeling, Short wave infrared radiation, Seaborgium

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Proceedings Article | 11 December 2012 Paper

Paper

A time series of photosynthetically available radiation at the ocean surface from SeaWiFS and MODIS data

Robert Frouin, John McPherson, Kyozo Ueyoshi, Bryan Franz

Proceedings Volume 8525, 852519 (2012) https://doi.org/10.1117/12.981264

KEYWORDS: Sensors, Clouds, Satellites, Atmospheric modeling, In situ metrology, Niobium, Ultraviolet radiation, MODIS, Transmittance, Solar energy

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Proceedings Article | 15 October 2012 Paper

Paper

Suomi NPP VIIRS ocean color data product early mission assessment

Kevin Turpie, Wayne Robinson, Bryan Franz, Robert Eplee, Gerhard Meister, Gwyn Fireman, Frederick Patt, Robert Barnes, Charles McClain

Proceedings Volume 8510, 85101H (2012) https://doi.org/10.1117/12.931113

KEYWORDS: Calibration, MODIS, Sensors, Composites, Climatology, Algorithm development, Magnesium, Atmospheric corrections, Radiometry, Near infrared

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Proceedings Article | 15 October 2012 Paper

Paper

VIIRS on-orbit calibration for ocean color data processing

Robert Eplee, Kevn Turpie, Gwyn Fireman, Gerhard Meister, Thomas Stone, Frederick Patt, Bryan Franz, Sean Bailey, Wayne Robinson, Charles McClain

Proceedings Volume 8510, 85101G (2012) https://doi.org/10.1117/12.930483

KEYWORDS: Calibration, Diffusers, Bidirectional reflectance transmission function, Sensors, Mirrors, Reflectivity, Space operations, MODIS, Short wave infrared radiation, Atmospheric corrections

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Proceedings Article | 8 October 2011 Paper

Paper

Some insights of spectral optimization in ocean color inversion

Zhongping Lee, Bryan Franz, Shaoling Shang, Qiang Dong, Robert Arnone

Proceedings Volume 8175, 817508 (2011) https://doi.org/10.1117/12.897875

KEYWORDS: Global system for mobile communications, Remote sensing, Absorption, Data modeling, Ocean optics, Reflectivity, Backscatter, Optimization (mathematics), Water, Spectral models

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Proceedings Article | 14 September 2011 Paper

Paper

Uncertainty assessment of the SeaWiFS on-orbit calibration

Robert Eplee, Gerhard Meister, Frederick Patt, Bryan Franz, Charles McClain

Proceedings Volume 8153, 81530B (2011) https://doi.org/10.1117/12.892340

KEYWORDS: Calibration, Signal to noise ratio, Atmospheric corrections, Radiometric corrections, Diffusers, Atmospheric propagation, Ocean optics, Climatology, Scatter measurement, Sensor calibration

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Proceedings Article | 14 September 2011 Paper

Paper

The VIIRS ocean data simulator enhancements and results

Wayne Robinson, Frederick Patt, Bryan Franz, Kevin Turpie, Charles McClain

Proceedings Volume 8153, 81531P (2011) https://doi.org/10.1117/12.892936

KEYWORDS: Sensors, Device simulation, Reflectivity, Ocean optics, Calibration, Computer simulations, Atmospheric modeling, Signal detection, Stray light, Aerosols

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Proceedings Article | 14 September 2011 Paper

Paper

Radiometric quality of the MODIS bands at 667 and 678nm

Gerhard Meister, Bryan Franz

Proceedings Volume 8153, 81531M (2011) https://doi.org/10.1117/12.892022

KEYWORDS: MODIS, Signal to noise ratio, Polarization, Sensors, Stray light, Clouds, Luminescence, Calibration, Data centers, Mirrors

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Proceedings Article | 14 September 2011 Paper

Paper

Adjustments to the MODIS Terra radiometric calibration and polarization sensitivity in the 2010 reprocessing

Gerhard Meister, Bryan Franz

Proceedings Volume 8153, 815308 (2011) https://doi.org/10.1117/12.891787

KEYWORDS: MODIS, Sensors, Calibration, Mirrors, Polarization, Atmospheric modeling, Spatial resolution, Radiometric corrections, Atmospheric corrections, Solids

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Proceedings Article | 14 September 2011 Paper

Paper

Assessment of NPP VIIRS ocean color data products: hope and risk

Kevin Turpie, Gerhard Meister, Gene Eplee, Robert Barnes, Bryan Franz, Frederick Patt, Wayne Robinson, Charles McClain

Proceedings Volume 8153, 81530M (2011) https://doi.org/10.1117/12.893945

KEYWORDS: Calibration, MODIS, Signal to noise ratio, Climatology, Algorithm development, Data acquisition, Satellites, Reflectivity, Diffusers, Sensors

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Proceedings Article | 21 August 2009 Paper

Paper

A VIIRS ocean data simulator

Wayne Robinson, Frederick Patt, Bryan Franz, Kevin Turpie, Charles McClain

Proceedings Volume 7452, 74520A (2009) https://doi.org/10.1117/12.827058

KEYWORDS: Sensors, Computer simulations, Device simulation, Clouds, Aerosols, MODIS, Satellites, Atmospheric particles, Calibration, Data processing

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Proceedings Article | 21 August 2009 Paper

Paper

Detector dependency of MODIS polarization sensitivity derived from on-orbit characterization

Gerhard Meister, Bryan Franz, Ewa Kwiatkowska, Robert Eplee, Charles McClain

Proceedings Volume 7452, 74520N (2009) https://doi.org/10.1117/12.825385

KEYWORDS: Sensors, MODIS, Calibration, Polarization, Mirrors, Diamond, Atmospheric corrections, Satellites, Solids, Biology

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Proceedings Article | 19 August 2009 Paper

Paper

Influence of thin cirrus clouds on ocean color products

Gerhard Meister, Bryan Franz, Charles McClain

Proceedings Volume 7459, 745903 (2009) https://doi.org/10.1117/12.827272

KEYWORDS: Clouds, Reflectivity, Aerosols, Contamination, MODIS, Atmospheric corrections, Sensors, Atmospheric particles, Satellites, Atmospheric modeling

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SPIE Journal Paper | 1 June 2008

Moderate Resolution Imaging Spectroradiometer on Terra: limitations for ocean color applications

Byran Franz, Ewa Kwiatowska, Gerhard Meister, Charles McClain

JARS, Vol. 2, Issue 01, 023525, (June 2008) https://doi.org/10.1117/12.10.1117/1.2957964

KEYWORDS: Calibration, Sensors, MODIS, Mirrors, Polarization, Near infrared, Composites, Error analysis, Diffusers, Reflectivity

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Proceedings Article | 12 October 2007 Paper

Paper

Correction of subframe striping in high-resolution MODIS ocean color products

Gerhard Meister, Chunhui Pan, Frederick Patt, Bryan Franz, Jack Xiong, Charles McClain

Proceedings Volume 6677, 66770P (2007) https://doi.org/10.1117/12.732191

KEYWORDS: MODIS, Sensors, Calibration, Spatial resolution, Diffusers, Solids, Biology, Diamond, Image resolution, Scanners

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Proceedings Article | 9 October 2007 Paper

Paper

Approach for the long-term spatial and temporal evaluation of ocean color satellite data products in a coastal environment

P. Jeremy Werdell, Bryan Franz, Sean Bailey, Lawrence Harding, Gene Feldman

Proceedings Volume 6680, 66800G (2007) https://doi.org/10.1117/12.732489

KEYWORDS: Satellites, Algorithm development, Global system for mobile communications, Ocean optics, Sensors, Atmospheric corrections, MODIS, Remote sensing, Water, Magnesium

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Proceedings Article | 5 October 2007 Paper

Paper

Utility of MODIS-Terra for ocean color applications

Bryan Franz, Ewa Kwiatkowska, Gerhard Meister, Charles McClain

Proceedings Volume 6677, 66770Q (2007) https://doi.org/10.1117/12.732082

KEYWORDS: Calibration, Sensors, MODIS, Mirrors, Polarization, Near infrared, Composites, Error analysis, Reflectivity, Satellites

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Proceedings Article | 26 September 2007 Paper

Paper

On-orbit calibration of SeaWiFS: revised temperature and gain corrections

Robert Eplee, Frederick Patt, Gerhard Meister, Bryan Franz, Sean Bailey, Charles McClain

Proceedings Volume 6677, 66770E (2007) https://doi.org/10.1117/12.734046

KEYWORDS: Calibration, Near infrared, Sensors, Atmospheric corrections, Aerosols, Data corrections, Satellites, Climatology, Atmospheric propagation, Sensor calibration

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The NASA Ocean Biology Processing Group's Calibration and Validation (Cal/Val) Team has used SeaWiFS onorbit lunar and gain calibration data, in conjunction with mission-long trends of global ocean color data products, to diagnose and correct recently emergent residual drifts in the radiometric response of the instrument. An anomaly analysis of the time series of global mean normalized water-leaving radiances, the atmospheric correction parameter ∈, and chlorophyll show significant departures from the mission-long trends beginning in January 2006. The lunar time series trends for the near infrared (NIR) bands (765 nm and 865 nm) show significant periodic departures from mission-long trends beginning at the same time. ∈ is dependent on the ratio of these two bands; trends in this parameter would propagate through the atmospheric correction algorithm to the retrieved water-leaving radiances. An analysis of fit residuals from the lunar time series shows that the focal plane temperature dependencies of the radiometric response of the detectors for these two bands have changed over the 9+ year mission. The Cal/Val Team has used these residuals to compute a revised set of temperature corrections for data collected starting 1 January 2006. The lunar calibration data and a mission-long ocean color test data set have been reprocessed with the revised temperature corrections. The reprocessed data show that the trends in the NIR bands have been minimized and that the departures of the water-leaving radiances, ∈, and chlorophyll from the mission-long trends have been greatly reduced. The anomaly analysis of the water-leaving radiances in the 510 nm band still shows a residual drift of -2.9% over the mission. The anomaly analysis of the ∈ time series shows a residual drift of +2.8% over the mission. A corresponding drift is not observed in the lunar calibration time series for the NIR bands. The lunar calibration data are obtained at a different set of instrument gains than are the ocean data. An analysis of the mission-long time series of on-orbit gain calibration data shows that the gain ratios for the NIR bands change -0.76% (765 nm) and +0.56% (865 nm) over the mission, corresponding to a -1.3% drift in the band ratio. The lunar calibration time series for the NIR bands have been corrected for this gain drift, and the change in radiometric response over time has been recomputed for each band. The mission-long ocean color test data set has been reprocessed with these revised corrections for the NIR bands. The anomaly analysis of the reprocessed water-leaving radiances at 510 nm shows the drift to have been essentially eliminated, while the anomaly analysis of epsilon shows a reduced drift of +2.0%. These analyses show the sensitivity of ocean color data to small drifts in instrument calibration and demonstrate the use of time series of global mean geophysical parameters to monitor the long-term stability of the instrument calibration on orbit. The two updates to SeaWiFS radiometric calibration have been incorporated into the recent reprocessing of the SeaWiFS mission-long ocean data set.

Proceedings Article | 22 August 2005 Paper

Paper

The continuity of ocean color measurements from SeaWiFS to MODIS

Bryan Franz, P. Werdell, Gerhard Meister, Sean Bailey, Robert Eplee, Gene Feldman, Ewa Kwiatkowska, Charles McClain, Frederick Patt, Donna Thomas

Proceedings Volume 5882, 58820W (2005) https://doi.org/10.1117/12.620069

KEYWORDS: MODIS, Calibration, Sensors, Polarization, Atmospheric modeling, Atmospheric corrections, Algorithm development, Stray light, Contamination, Error analysis

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Proceedings Article | 5 November 2003 Paper

Paper

SIMBIOS program in support of ocean color missions: 1997-2003

Giulietta Fargion, Bryan Franz, Ewa Kwiatkowska, Christophe Pietras, Sean Bailey, Joel Gales, Gerhard Meister, Kirk Knobelspiesse, Jeremy Werdell, Charles McClain

Proceedings Volume 5155, (2003) https://doi.org/10.1117/12.504769

KEYWORDS: Calibration, Sensors, MODIS, Satellites, Algorithm development, Molybdenum, Data processing, Optical coherence tomography, Aerosols, Sun

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Proceedings Article | 24 September 2002 Paper

Paper

New results of ground-target-based calibration of MOS on IRS

Horst Schwarzer, Bryan Franz, Andreas Neumann, Karl-Heinz Suemnich, Thomas Walzel, Gerhard Zimmermann

Proceedings Volume 4814, (2002) https://doi.org/10.1117/12.451501

KEYWORDS: Calibration, Molybdenum, Reflectivity, Sun, Lamps, Bidirectional reflectance transmission function, Satellites, Sensors, Remote sensing, Scanners

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Proceedings Article | 1 October 1993 Paper

Paper

Observations of the large-scale infrared emission from the galactic plane region by the diffuse infrared background experiment

Thomas Sodroski, Richard Arendt, Michael Hauser, Nancy Boggess, Eli Dwek, Thomas Kelsall, Samuel Moseley, Thomas Murdock, Robert Silverberg, G. Bruce Berriman, Bryan Franz, Henry Freudenreich, Casey Lisse, M. Mitra, N. Odegard, W. Spiesman, S. Stemwedel, G. Toller, J. Weiland

Proceedings Volume 2019, (1993) https://doi.org/10.1117/12.157827

KEYWORDS: Galactic astronomy, Hydrogen, Infrared radiation, Stars, Near infrared, Polarization, Infrared backgrounds, Infrared sensors, Remote sensing, Far infrared

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Showing 5 of 31 publications

Conference Committee Involvement (1)

Remote Sensing of the Open and Coastal Ocean and Inland Waters

24 September 2018 | Honolulu, Hawaii, United States

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