Dr. Z. Peter Szewczyk Profile

Dr. Z. Peter Szewczyk

Senior Research Scientist at Applied Mechanics Associates, Inc.

SPIE Involvement:

Author

Area of Expertise:

optimization techniques , remote sensing instruments , measurements calibration and validation , computational intelligence techniques , orbital mechanics

Publications (32)

Proceedings Article | 19 October 2023 Paper

Comparison of unfiltered CERES shortwave radiances measured in the minor plane over snow/ice of Greenland during summer solstices

Z. Peter Szewczyk, G. Louis Smith, Janet Daniels, Kory Priestley

Proceedings Volume 12730, 127300B (2023) https://doi.org/10.1117/12.2678565

KEYWORDS: Equipment, Shortwaves, Scanners, Satellites, Head, Statistical analysis, Spectral response, Clouds, Space operations, Reflection

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Proceedings Article | 28 October 2022 Presentation + Paper

Comparison of unfiltered shortwave radiances measured by CERES from the Aqua and S-NPP or NOAA20 satellites over closely matched ocean or snow sites

Z. Peter Szewczyk, Susan Thomas, Kory Priestley

Proceedings Volume 12265, 1226506 (2022) https://doi.org/10.1117/12.2636283

KEYWORDS: Satellites, Scanners, Shortwaves, Clouds, MODIS, Solar radiation, Satellite communications, Environmental sensing, Climatology, Sun

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Proceedings Article | 12 September 2021 Presentation + Paper

Checking vitals of CERES scanners: parameters of a slow mode filter

Z. Peter Szewczyk, G. Lewis Smith, Susan Thomas, Kory Priestley

Proceedings Volume 11859, 118590B (2021) https://doi.org/10.1117/12.2597779

KEYWORDS: Scanners, Thermal effects, Calibration, Optical filters, Satellites, Sensors, Numerical analysis, Radiometry, Solar radiation

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Proceedings Article | 9 October 2019 Presentation + Paper

Comparison of unfiltered CERES radiances measured from the Aqua and S-NPP or JPSS1 satellites over closely matched sites

Z. Peter Szewczyk, Susan Thomas, Kory Priestley

Proceedings Volume 11152, 1115204 (2019) https://doi.org/10.1117/12.2530457

KEYWORDS: Satellites, Scanners, Clouds, Shortwaves, MODIS, Solar radiation, Satellite communications, Remote sensing, Environmental sensing, Climatology

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Proceedings Article | 9 September 2019 Presentation + Paper

Performance trends of Clouds and the Earth’s Radiant Energy System (CERES) instruments aboard terra, aqua, S-NPP and NOAA-20 missions

Susan Thomas, K. Priestley, M. Shankar, P. Hess, R. Wilson, N. Smith, D. Walikainen, Z. Szewczyk

Proceedings Volume 11127, 1112716 (2019) https://doi.org/10.1117/12.2530828

KEYWORDS: Sensors, Shortwaves, Calibration, Space operations, Clouds, Sensor calibration, Instrument modeling, Sensor performance, Black bodies, Lamps

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Clouds and the Earth’s Radiant Energy System (CERES) instrument was designed to provide accurate measurements for the long-term monitoring of Earth’s radiation energy budget. Seven copies of the CERES instruments were built by Northrop Grumman Aerospace Systems (NGAS) and has been flying aboard five spacecraft platforms. The CERES instrument with the three scanning sensors measure radiances in 0.3 to 5.0 micron region with Shortwave sensor, 0.3 to >100 microns with Total sensor, and either a 8 - 12 micron region Window sensor on the first six instruments or a 5 – 35 micron longwave sensor on the seventh Flight Model 6 (FM6) instrument. Currently there are six instruments actively collecting Longwave and Shortwave measurements. Four of the CERES instruments (Flight Models1 through 4) fly aboard Earth Observing System (EOS) Terra and Aqua platforms with two instruments aboard each spacecraft. Flight Models 5 and 6 are aboard the Suomi-NPP and NOAA-20 spacecrafts. The pre-launch accuracy goal for the CERES instrument measurements is to have the emitted longwave radiances within 0.5% and the shortwave radiances within 1.0%. The in-flight evaluation of the sensor performance are carried out using the internal calibration module (ICM) comprising of blackbody sources and tungsten lamp, and a solar diffuser plate known as the Mirror Attenuator Mosaic (MAM). The ICM and MAM calibration results are instrumental in understanding the ground to flight shift and in-flight drifts in CERES sensors’ gains. In addition, several validation studies utilising targets such as tropical ocean and deep convective clouds are performed as part of the Cal/Val protocol. Comparisons of sensor measurements from instruments on the same spacecraft as well as coincident measurements of CERES instruments on different spacecraft at overpass regions are also performed to support the intercomparison studies between the sensors of different instruments. The calibration and validation studies collectively provide good understanding of the instrument performance and any changes occuring at different spectral regions of the sensors. This paper discusses the various studies utilized to evaluate the sensor perform.

Proceedings Article | 9 October 2018 Paper

Strategies for shortwave radiances comparison of CERES instruments aboard the JPSS1 and Terra/Aqua satellites

Z. Peter Szewczyk, Susan Thomas, Kory Priestley

Proceedings Volume 10786, 1078604 (2018) https://doi.org/10.1117/12.2323131

KEYWORDS: Satellites, Scanners, Shortwaves, Climatology, Environmental sensing, Data processing, Data modeling, Solar radiation models, Clouds, Instrument modeling

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Proceedings Article | 7 September 2018 Paper

Early trends on the Clouds and the Earth's Radiant Energy System (CERES) Flight Model 6 (FM6) instrument's performance

Nathaniel Smith, Robert Wilson, Z. Peter Szewczyk, Susan Thomas, Kory Priestley

Proceedings Volume 10764, 107640R (2018) https://doi.org/10.1117/12.2322712

KEYWORDS: Calibration, Sensors, Shortwaves, Clouds, Space operations, Black bodies, Solar radiation, Satellites

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Proceedings Article | 2 October 2017 Presentation + Paper

Improving consistency of the ERB record measured by CERES scanners aboard Terra/Aqua/S-NPP satellites

Z. Peter Szewczyk, Dale Walikainen, Nitchie Smith, Susan Thomas, Kory Priestley

Proceedings Volume 10424, 104240I (2017) https://doi.org/10.1117/12.2278457

KEYWORDS: Scanners, Shortwaves, Satellites, Statistical analysis, Environmental sensing, Climatology, Instrument modeling, Clouds, Data modeling, Solar radiation

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Proceedings Article | 5 September 2017 Paper

A strategy to assess the pointing accuracy of the CERES FM1-FM5 scanners

Nathaniel Smith, Z. Peter Szewczyk, Phillip Hess, Kory Priestley

Proceedings Volume 10402, 104020R (2017) https://doi.org/10.1117/12.2271644

KEYWORDS: Space operations, Solar radiation, Scanners, Clouds, Solar energy, Radiometry, Sensors, Temperature metrology, Detection and tracking algorithms, Sensor calibration

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Proceedings Article | 19 October 2016 Presentation + Paper

Comparison of unfiltered radiances measured in the minor plane by CERES scanners around the time of summer solstices

Z. Peter Szewczyk, G. Louis Smith, Kory Priestley

Proceedings Volume 10001, 1000108 (2016) https://doi.org/10.1117/12.2240953

KEYWORDS: Scanners, Shortwaves, Satellites, Line width roughness, Statistical analysis, Head, Clouds, Environmental sensing, Climatology, Data acquisition

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Proceedings Article | 16 October 2015 Paper

Comparison of unfiltered CERES radiances measured from the S-NPP and Aqua satellites over matched sites

Z. Szewczyk, G. Smith, Kory Priestley

Proceedings Volume 9640, 964006 (2015) https://doi.org/10.1117/12.2191506

KEYWORDS: Satellites, Scanners, Clouds, MODIS, Shortwaves, Remote sensing, Environmental sensing, Climatology, Instrument modeling, Solar radiation

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Proceedings Article | 17 October 2014 Paper

Comparison of unfiltered radiances measured by CERES instruments aboard the S-NPP and Terra/Aqua satellites

Z. Peter Szewczyk, G. Louis Smith, Kory Priestley

Proceedings Volume 9242, 92420Y (2014) https://doi.org/10.1117/12.2063320

KEYWORDS: Satellites, Scanners, Shortwaves, Clouds, Remote sensing, Environmental sensing, Climatology, Instrument modeling, Optical scanning systems, Atmospheric optics

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Proceedings Article | 26 September 2014 Paper

Assessment of the clouds and the Earth's radiant energy system (CERES) flight model 5 (FM5) instrument's performance and stability

Nathaniel Smith, Susan Thomas, Mohan Shankar, Z. Szewczyk, Robert Wilson, Dale Walikainen, Janet Daniels, Phillip Hess, Kory Priestley

Proceedings Volume 9218, 921802 (2014) https://doi.org/10.1117/12.2061833

KEYWORDS: Calibration, Sensors, Shortwaves, Black bodies, Satellites, Solar radiation, Space operations, Solar radiation models, Clouds, Instrument modeling

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Proceedings Article | 23 September 2013 Paper

On-orbit solar calibration methods using the Clouds and Earth's Radiant Energy System (CERES) in-flight calibration system: lessons learned

Robert Wilson, Kory Priestley, Susan Thomas, Phillip Hess, Mohan Shankar, Nathaniel Smith, Peter Szewczyk

Proceedings Volume 8866, 886607 (2013) https://doi.org/10.1117/12.2025967

KEYWORDS: Calibration, Shortwaves, Sensors, Solar energy, Bolometers, Diffusers, Sun, Solar radiation, Space operations, Mirrors

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The Clouds and Earth's Radiant Energy System (CERES) scanning thermistor bolometers measure earth-reflected solar and earth-emitted long-wave radiances, at the top- of-the-atmosphere. The bolometers measure the earth radiances in the broadband shortwave solar (0.3-5.0 microns) and total (0.3->100 microns) spectral bands as well as in the 8->12 microns water vapor window spectral band over geographical footprints as small as 10 kilometers at nadir. December 1999, the second and third set of CERES bolometers was launched on the Earth Observing Mission Terra Spacecraft. May 2003, the fourth and fifth set of bolometers was launched on the Earth Observing Mission Aqua Spacecraft. Recently, (October 2011) the sixth instrument was launched on the National Polar-orbiting Operational Environmental Satellite System Preparatory Project (Suomi NPP) Spacecraft. Ground vacuum calibrations define the initial count conversion coefficients that are used to convert the bolometer output voltages into filtered earth radiances. The mirror attenuator mosaic (MAM), a solar diffuser plate, was built into the CERES instrument package calibration system in order to define on-orbit shifts or drifts in the sensor responses. It followed a similar design as the Earth Radiation Budget Experiment (ERBE) scanners with improvements from lessons learned.

The shortwave and shortwave part of the total-wave sensors are calibrated using the solar radiances reflected from the MAM's. Each MAM consists of baffle-solar diffuser plate systems, which guide incoming solar radiances into the instrument fields of view of the shortwave and total wave sensor units. The MAM diffuser reflecting type surface consists of an array of spherical aluminum mirror segments, which are separated by a Merck Black A absorbing surface, over-coated with SIOx (SIO2 for PFM). Thermistors are located within each MAM plate and the total channel baffle. The CERES MAM is designed to yield calibration precisions approaching .5 percent for the total and shortwave detectors. The Terra FM1 and FM2 shortwave channels and the FM1 and FM2 total channels MAM calibration systems showed shifts in their solar calibrations of 1.5, 2.5, 1.5 and 6 percent, respectively within the first year. The Aqua FM3, and FM4 shortwave channels and the FM3 and FM4 total channels MAM calibration systems showed shifts in their solar calibrations of 1.0, 1.2, 2.1 and .8 percent, respectively within the first year. A possible explanation has attributed the MAM reflectance change to on-orbit solar ultraviolet/atomic oxygen/out-gassing induced chemical changes to the SIOx coated MAM assembly during ram and solar exposure. There is also changes to the sensor telescope shortwave filters as well as the Total channel mirrors and/or sensors. The Soumi NPP FM5 is still after 2.5 years displaying a stability of less than .5 percent. In this presentation, lessons learned from the ERBE MAM and application of knowledge of how the space environment affected the CERES FM1-4 solar calibrations will be presented along with on-orbit measurements for the thirteen years the CERES instruments have been on-orbit.

Proceedings Article | 19 November 2012 Paper

Method of comparing CERES and ScaRaB 3 measurements

G. Louis Smith, Z. Peter Szewczyk, Kory Priestley, Remy Roca

Proceedings Volume 8533, 85331D (2012) https://doi.org/10.1117/12.974342

KEYWORDS: Space operations, Radiometry, Shortwaves, Solids, Scanners, Clouds, Calibration, Climatology, Satellites, Distance measurement

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Proceedings Article | 19 October 2012 Paper

A strategy to assess the pointing accuracy of the CERES (FM5) scanner

Nathaniel Smith, Z. Szewczyk, Phillip Hess, Kory Priestley

Proceedings Volume 8510, 851006 (2012) https://doi.org/10.1117/12.929952

KEYWORDS: Space operations, Clouds, Solar radiation, Point spread functions, Scanners, Satellites, Radiometry, Detection and tracking algorithms, Solar energy, Shortwaves

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Proceedings Article | 26 October 2011 Paper

Putting all CERES instruments (Terra/Aqua) on the same radiometric scale

Z. Peter Szewczyk, Kory Priestley, Dale Walikainen, Norman Loeb, G. Louis Smith

Proceedings Volume 8177, 817704 (2011) https://doi.org/10.1117/12.896897

KEYWORDS: Shortwaves, Sensors, Scanners, Satellites, Clouds, Solar radiation, Environmental sensing, Climatology, Calibration, Statistical analysis

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Proceedings Article | 11 November 2010 Paper

Characterization of the clouds and the Earth's radiant energy system (CERES) sensors on Terra and Aqua spacecraft

Susan Thomas, K. Priestley, N. Smith, N. Loeb, P. Hess, M. Shankar, D, Walikainen, Z. Szewczyk, R. Wilson, D. Cooper

Proceedings Volume 7862, 78620N (2010) https://doi.org/10.1117/12.869684

KEYWORDS: Sensors, Shortwaves, Calibration, Space operations, Black bodies, Sensor calibration, Lamps, Clouds, Tungsten, Bolometers

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Proceedings Article | 27 October 2010 Paper

Putting Terra CERES instruments on the same radiometric scale

Z. Peter Szewczyk, Kory Priestley, Dale Walikainen, Norman Loeb, G. Louis Smith

Proceedings Volume 7827, 78270O (2010) https://doi.org/10.1117/12.862470

KEYWORDS: Shortwaves, Scanners, Satellites, Sensors, Clouds, Climatology, Solar radiation, Environmental sensing, Data processing, Radiometry

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Proceedings Article | 29 September 2009 Paper

CERES (FM2) field campaigns of 2008

Z. Peter Szewczyk, Kory Priestley

Proceedings Volume 7475, 74750E (2009) https://doi.org/10.1117/12.829854

KEYWORDS: Satellites, Scanners, Aerosols, Calibration, Clouds, Shortwaves, Sensors, Head, Solar radiation, Solar energy

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Proceedings Article | 28 August 2009 Paper

Sensor performance of Clouds and the Earth's Radiant Energy System (CERES) instruments aboard EOS Terra and Aqua spacecraft based on post-launch calibration studies

Susan Thomas, K. Priestley, P. Hess, R. Wilson, M. Avery, D. Walikainen, Z. P. Szewczyk, D. Cooper, M. Shankar

Proceedings Volume 7452, 74520I (2009) https://doi.org/10.1117/12.828487

KEYWORDS: Sensors, Shortwaves, Calibration, Space operations, Clouds, Black bodies, Lamps, Tungsten, Sensor calibration, Sensor performance

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Proceedings Article | 20 August 2008 Paper

Radiometric performance of the CERES broadband radiometers on the Terra and Aqua spacecraft

Kory Priestley, G. Louis Smith, Susan Thomas, Grant Matthews, Z. Peter Szewczyk

Proceedings Volume 7081, 70811A (2008) https://doi.org/10.1117/12.797957

KEYWORDS: Shortwaves, Calibration, Space operations, Solar radiation, Radiometry, Space telescopes, Solids, Aerospace engineering, Clouds, Telescopes

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Proceedings Article | 17 October 2007 Paper

The slow mode of the CERES scanning radiometers

Z. Peter Szewczyk, G. Louis Smith, Kory Priestley

Proceedings Volume 6745, 674514 (2007) https://doi.org/10.1117/12.737954

KEYWORDS: Satellites, Scanners, Thermal effects, Radiometry, Sensors, Calibration, Clouds, Signal detection, Optical filters, Bolometers

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Proceedings Article | 5 October 2007 Paper

Radiometric performance of the CERES Earth radiation budget climate record sensors on the EOS Aqua and Terra spacecraft

Kory Priestley, G. Louis Smith, Susan Thomas, Denise Cooper, Robert Lee, Dale Walikainen, Phil Hess, Z. Peter Szewczyk, Robert Wilson

Proceedings Volume 6677, 66770H (2007) https://doi.org/10.1117/12.735294

KEYWORDS: Calibration, Shortwaves, Space operations, Climatology, Sensors, Black bodies, Optical filters, Environmental sensing, Earth's atmosphere, Radiometry

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Proceedings Article | 12 October 2006 Paper

Recent field campaigns with CERES instruments

Z. Peter Szewczyk, Kory Priestley

Proceedings Volume 6362, 63620H (2006) https://doi.org/10.1117/12.689811

KEYWORDS: Satellites, Scanners, Shortwaves, Head, Clouds, Calibration, Solar radiation, Solar energy, Space operations, Bidirectional reflectance transmission function

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Proceedings Article | 1 November 2005 Paper

Comparison of top of the atmosphere GERB measured radiances with independent radiative transfer simulations obtained at the Valencia Anchor Station area

A. Velazquez Blazquez, S. Alonso, A. Bodas-Salcedo, S. Dewitte, C. Domenech, J. Gimeno, J. Harries, J. Jorge Sanchez, A. Labajo, N. Loeb, D. Pino, A. Sanchis, G. Smith, Z. P. Szewczyk, R. Tarruella, J. Torrobella, E. Lopez-Baeza

Proceedings Volume 5979, 59790H (2005) https://doi.org/10.1117/12.627705

KEYWORDS: Radiative transfer, Satellites, Global Positioning System, Bidirectional reflectance transmission function, Spatial resolution, Shortwaves, Earth's atmosphere, Anisotropy, Meteorology, Near infrared

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Proceedings Article | 16 February 2004 Paper

Validation of CERES instruments aboard the Terra and Aqua satellites

Zbigniew Szewczyk, George Smith, Kory Priestley

Proceedings Volume 5235, (2004) https://doi.org/10.1117/12.513337

KEYWORDS: Shortwaves, Satellites, Space operations, Statistical analysis, Data acquisition, Scanners, Data centers, Aerospace engineering, Data processing, Head

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Proceedings Article | 2 February 2004 Paper

Method for comparison of GERB and CERES radiances

George Smith, Z. Peter Szewczyk, Pamela Mlynczak, Robert Lee, Bruce Wielicki, Kory Priestley, John Harries, Steven DeWitt, Nicolas Clerbaux

Proceedings Volume 5234, (2004) https://doi.org/10.1117/12.513464

KEYWORDS: Sensors, Space operations, Calibration, Solar radiation, Satellites, Shortwaves, Solar energy, Radiometry, Clouds, Bidirectional reflectance transmission function

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Proceedings Article | 10 November 2003 Paper

Measurements of filtered lunar radiances using the NASA Terra spacecraft/CERES thermistor bolometer sensors during 2000 and 2001

Robert Lee, George Smith, Zbigniew Szewczyk, David Kratz, Kory Priestley, Susan Thomas, Kathryn Bush, Jack Paden, Dhirendra Pandey, Robert Wilson, Aiman Al-Hajjah

Proceedings Volume 5151, (2003) https://doi.org/10.1117/12.508333

KEYWORDS: Sensors, Shortwaves, Bolometers, Space operations, Calibration, Temperature metrology, Solids, Black bodies, Clouds, Instrument modeling

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Studies were conducted to define lunar radiances on an absolute radiometric scale tied to the International Temperature Scale of 1990 (ITS-90). The Clouds and the Earth's Radiant Energy System (CERES) thermistor bolometer sensor instruments were used to measure lunar radiances from the NASA Tropical Rainfall Measuring Mission (TRMM), Terra, and Aqua spacecraft platforms. Each CERES instrument package consisted of three different sensors: (1) broadband shortwave [0.3 to 5 micrometers]; (2) broadband total [0.3 to >100 micrometers]; and (3) narrowband, water vapor window [8 to 12 micrometers]. Moon-reflected solar radiances were measured with the shortwave sensor while both moon-reflected solar and moon-emitted longwave radiances were measured using the total sensor. The differences between the total and shortwave sensor measurements were used to determine the broadband longwave, moon-emitted radiances. The narrowband, water vapor window sensor measured only the longwave, moon-emitted radiances. The radiances were obtained as a function of phase angle (formed at the moon between directions to the sun and the spacecraft). The resulting filtered radiances were normalized to the mean sun-moon distance, one astronomical unit (AU), and to the mean earth-moon distance of 0.0026 AU (384,400 kilometers). 1998, 2000, and 2001, CERES lunar filtered measurements are presented, compared, and analyzed. Additional measurements are presented from the January 9, 2001, and May 16, 2003, total lunar eclipse events. Analyses of the Clouds and the Earth's Radiant Energy System (CERES) thermistor bolometer sensor observations of lunar radiances indicated that broadband shortwave and longwave lunar filtered radiances can be linked to a radiometric scale based upon an International Temperature Scale of 1990 (ITS-90) at absolute levels approaching ± 0.2 Wm^-2sr^-1. For a lunar image diameter of 31 minutes of arc, an emitting lunar disc temperature of approximately 400 Kelvin was estimated from the longwave radiances near 7-degree phase angle. The integration of the CERES unfiltered radiances over all reflection angles can be used to define the moon radiation budget (MRB).

Proceedings Article | 10 November 2003 Paper

A comprehensive radiometric validation protocol for CERES Earth Radiation Budget climate record sensors

Kory Priestley, Susan Thomas, Peter Spence, Z. Szewczyk, Edward Kizer, Dale Walikainen, Aiman Al-Hajjah, Robert Wilson

Proceedings Volume 5151, (2003) https://doi.org/10.1117/12.507520

KEYWORDS: Calibration, Sensors, Optical filters, Shortwaves, Clouds, Space operations, Instrument modeling, Environmental sensing, Climatology, Error analysis

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Proceedings Article | 18 April 2003 Paper

A recovery and comparison of shortwave radiances measured by CERES instruments operating on TRMM and Terra satellites

Zbigniew Szewczyk

Proceedings Volume 4882, (2003) https://doi.org/10.1117/12.462378

KEYWORDS: Shortwaves, Satellites, Sensors, Electronics, Pattern recognition, Data processing, Interference (communication), Statistical analysis, Neural networks, Scanners

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Proceedings Article | 9 February 2001 Paper

Broadband measurements of lunar radiances using the Tropical Rainfall Measuring Mission (TRMM) spacecraft/Clouds and the Earth's Radiant Energy System (CERES) sensors

Robert Lee, G. Louis Smith, Peter Spence, Dale Walikainen, Zbigniew Szewczyk, Jack Paden, Kory Priestley

Proceedings Volume 4169, (2001) https://doi.org/10.1117/12.417128

KEYWORDS: Sensors, Shortwaves, Space operations, Calibration, Bolometers, Image sensors, Clouds, Lamps, Mirrors, Black bodies

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12 Currently, the moon is being used as a radiometric target to determine on-orbit relative shifts or shifts in the responses of certain spacecraft shortwave sensors. Along these lines, the 1998 Tropical Rainfall Measuring Mission (TRMM) Spacecraft/Clouds and the Earth's Radiant Energy System (CERES) thermistor bolometer sensor observations of lunar radiances were analyzed to evaluate the feasibility using the lunar radiances to calibrate the CERES sensor responses. Over a 5 to 110 degree phase angle range, the CERES sensors were used to measure: broadband shortwave (0.3 micrometers to 5.0 micrometers ) moon-reflected solar filtered radiances; broadband total (0.3 micrometers to more than 100 micrometers ) moon- reflected solar and moon-emitted longwave filtered radiances; and narrowband window (8 micrometers to 12 micrometers ) moon- emitted longwave filtered radiances. The TRMM/CERES on-orbit radiance measurements are tied to an International Temperature Scale of 1990 (ITS-90) modeled radiometric scale at uncertainty levels approaching 0.2% (0.2 Wm^-2sr^-1). Therefore, the TRMM/CERES measurements should be useful in forecasting the precisions of scheduled CERES lunar measurements from the NASA Terra and Aqua Spacecraft platforms near phase angle of 22 and 55 degrees, respectively. The 7-degree phase angle, 1998 CERES shortwave, total, and window measurements yielded lunar filtered radiances of approximately 4.5+/- 0.2, 24.4+/- 0.5, and 4.5+/- 0.2 Wm^-2sr^-1, respectively. These lunar measurements indicate that broadband shortwave radiances can be characterized at the 5% uncertainty range. The 7-degree, shortwave lunar radiances were found to be approximately 1.5 and 3 times brighter greater the corresponding radiances found at the 22-degree and 55-degree phase angles, respectively. Therefore, the Terra and Aqua CERES lunar shortwave measurements near 22.5- degree and 55-degree phase angles should yield projected precisions in the 7% and 15% range, respectively. The CERES lunar filtered radiance are presented and discussed. Research efforts are outlined briefly for comparing the total sensor broadband and window narrowband longwave lunar radiances during the January 9, 2001 lunar eclipse.

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