Dr. Joseph A. Esposito Profile

Dr. Joseph A. Esposito

at Science Systems and Applications Inc

SPIE Involvement:

Author

Publications (10)

Proceedings Article | 21 October 2005 Paper

Terra and Aqua MODIS calibration algorithms and uncertainty analysis

Xiaoxiong Xiong, Junqiang Sun, Aisheng Wu, Kwo-Fu Chiang, Joe Esposito, William Barnes

Proceedings Volume 5978, 59780V (2005) https://doi.org/10.1117/12.627631

KEYWORDS: Calibration, MODIS, Sensors, Reflectivity, Uncertainty analysis, Diffusers, Short wave infrared radiation, Space operations, Received signal strength, Signal to noise ratio

Read Abstract +

Proceedings Article | 22 August 2005 Paper

Performance of MODIS solar diffuser and solar diffuser stability monitor

X. Xiong, H. Erives, S. Xiong, X. Xie, J. Esposito, J. Sun, W. Barnes

Proceedings Volume 5882, 58820S (2005) https://doi.org/10.1117/12.615334

KEYWORDS: MODIS, Calibration, Sensors, Diffusers, Sun, Reflectivity, Near infrared, Radiometry, Mirrors, Imaging systems

Read Abstract +

The Moderate Resolution Imaging Spectroradiometer (MODIS) reflective solar bands (RSB) cover wavelengths from 0.41 to 2.2μm. They are calibrated on-orbit by a solar diffuser (SD) panel, made of space-grade Spectralon. During each SD calibration a solar diffuser stability monitor (SDSM) is operated concurrently to track the changes of the SD bidirectional reflectance factor (BRF). The SDSM views alternately the sunlight (Sun View) through a fixed transmission screen and the sunlight diffusely reflected from the SD panel (SD view). A design error in the SDSM system, not discovered until post-launch, has caused significant ripples in the SDSM Sun view responses. Consequently an alternative normalization approach has been developed to remove the ripples in the SDSM Sun view responses and their impacts on the SD degradation analysis. This approach has been successfully used in the SDSM measurements on-orbit. In order to reduce the direct solar exposure onto the SD panel, the MODIS instrument was designed with a SD door that is normally commanded to an "open" position during SD/SDSM observations and to a "closed" position when the calibration is completed. For Terra MODIS launched in December 1999, an SD door related anomaly occurred in May 2003 that led to a decision to set the SD door permanently at the open position. This operational configuration has resulted in extra time of direct solar illumination on the SD plate and therefore a much faster SD degradation rate. In this paper we provide a brief description of the MODIS RSB calibration algorithm and the on-board SD and SDSM system used for the calibration. We examine the Terra MODIS SD degradation rate and its spectral dependency. The results from five years of SDSM observations are summarized in this paper and used to evaluate the SD on-orbit performance and its impact on the MODIS RSB calibration uncertainty. Prior to the SD door anomaly, the SD annual degradation rate was approximately 3% at 0.41μm, 2% at 0.47μm, and 1% at 0.53μm. After the SD door anomaly, the SD annual degradation rate has increased to 10% at 0.41μm, 7% at 0.47μm, and 4.5% at 0.53μm.

Proceedings Article | 4 November 2004 Paper

Terra MODIS RSB on-orbit calibration and performance: four years of data

Hector Erives, Xiaoxiong Xiong, Junqiang Sun, Joseph Esposito, Sanxiong Xiong, William Barnes

Proceedings Volume 5570, (2004) https://doi.org/10.1117/12.565060

KEYWORDS: Calibration, MODIS, Sensors, Mirrors, Reflectivity, Diffusers, Sun, Electronics, Signal attenuation, Space operations

Read Abstract +

Proceedings Article | 26 October 2004 Paper

MODIS reflective solar bands uncertainty analysis

Joseph Esposito, Xiaoxiong Xiong, Aisheng Wu, Junqiang Sun, William Barnes

Proceedings Volume 5542, (2004) https://doi.org/10.1117/12.558106

KEYWORDS: Reflectivity, Calibration, MODIS, Sensors, Diffusers, Vignetting, Uncertainty analysis, Space operations, Signal to noise ratio, Signal attenuation

Read Abstract +

Proceedings Article | 10 November 2003 Paper

On-orbit characterization of a solar diffuser’s bidirectional reflectance factor using spacecraft maneuvers

Xiaoxiong Xiong, Junqiang Sun, Joe Esposito, Xiaojin Liu, William Barnes, B. Guenther

Proceedings Volume 5151, (2003) https://doi.org/10.1117/12.504802

KEYWORDS: MODIS, Calibration, Reflectivity, Diffusers, Sensors, Mirrors, Space operations, Near infrared, Satellites, Infrared radiation

Read Abstract +

Proceedings Article | 9 April 2003 Paper

MODIS reflective solar bands calibration algorithm and on-orbit performance

Xiaoxiong Xiong, Jun-Qiang Sun, Joseph Esposito, Bruce Guenther, William Barnes

Proceedings Volume 4891, (2003) https://doi.org/10.1117/12.466096

KEYWORDS: MODIS, Calibration, Sensors, Diffusers, Reflectivity, Signal to noise ratio, Space operations, Short wave infrared radiation, Mirrors, Data modeling

Read Abstract +

Proceedings Article | 24 September 2002 Paper

Xiaoxiong Xiong, Aisheng Wu, Joseph Esposito, Jun-Qiang Sun, Nianzeng Che, Bruce Guenther, William Barnes

Proceedings Volume 4814, (2002) https://doi.org/10.1117/12.451978

KEYWORDS: Calibration, Mirrors, MODIS, Sensors, Sun, Diffusers, Reflectivity, Space operations, Visible radiation, Spectral calibration

Read Abstract +

Proceedings Article | 18 January 2002 Paper

MODIS solar diffuser: modeled and actual performance

Eugene Waluschka, Joseph Esposito, Jun-Qiang Sun, Xindong Wang, Xiaoxiong Xiong

Proceedings Volume 4483, (2002) https://doi.org/10.1117/12.453448

KEYWORDS: Diffusers, MODIS, Signal attenuation, Sun, Calibration, Computer simulations, Fluctuations and noise, Performance modeling, Ray tracing, Sensors

Read Abstract +

Proceedings Article | 12 December 2001 Paper

Degradation of MODIS optics and its reflective solar bands calibration

Xiaoxiong Xiong, Joseph Esposito, Jun-Qiang Sun, C. Pan, Bruce Guenther, William Barnes

Proceedings Volume 4540, (2001) https://doi.org/10.1117/12.450646

KEYWORDS: MODIS, Calibration, Mirrors, Sensors, Sun, Reflectivity, Diffusers, Data processing, Ocean optics, Imaging systems

Read Abstract +

Proceedings Article | 21 September 1994 Paper

Development of large-area drift chambers for high-energy gamma-ray astrophysics

Reshmi Mukherjee, D. Bertsch, Rajani Cuddapah, Brenda Dingus, Joseph Esposito, Carl Fichtel, Robert Hartman, Stanley Hunter, D. Thompson

Proceedings Volume 2305, (1994) https://doi.org/10.1117/12.187255

KEYWORDS: Spatial resolution, Gamma radiation, Xenon, Imaging systems, Muons, Telescopes, Electrons, Space telescopes, Argon, Observatories

Read Abstract +

Showing 5 of 10 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years