David K. Walker

According to our database, David K. Walker authored at least 24 papers between 1991 and 2020.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of three.

2020

Microwave Radiometer Instability Due to Infrequent Calibration.

Kevin J. Coakley, Jolene D. Splett, David K. Walker, Mustafa Aksoy, Paul E. Racette

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2020

2018

Brightness Temperature Calculation and Uncertainty Propagation for Conical Microwave Blackbody Targets.

Derek A. Houtz, William J. Emery, Dazhen Gu, David K. Walker

IEEE Trans. Geosci. Remote. Sens., 2018

2017

Electromagnetic Design and Performance of a Conical Microwave Blackbody Target for Radiometer Calibration.

Derek A. Houtz, William J. Emery, Dazhen Gu, Karl Jacob, Axel Murk, David K. Walker, Richard J. Wylde

IEEE Trans. Geosci. Remote. Sens., 2017

2015

Simulations to characterize a passive microwave blackbody design.

Derek A. Houtz, David K. Walker, Dazhen Gu

Proceedings of the 2015 IEEE International Geoscience and Remote Sensing Symposium, 2015

2013

A Geometric Error Model for Misaligned Calibration Target in Passive Microwave Remote-Sensing Systems.

Dazhen Gu, James Randa, David K. Walker

IEEE Geosci. Remote. Sens. Lett., 2013

A finite element thermal simulation of a microwave blackbody calibration target.

Derek Houtz, David K. Walker

Proceedings of the 2013 IEEE International Geoscience and Remote Sensing Symposium, 2013

2012

Extraction of Illumination Efficiency by Solely Radiometric Measurements for Improved Brightness-Temperature Characterization of Microwave Blackbody Target.

Dazhen Gu, Derek Houtz, James Randa, David K. Walker

IEEE Trans. Geosci. Remote. Sens., 2012

An investigation of antenna characterization techniques in microwave remote sensing calibration.

Derek Houtz, Dazhen Gu, David K. Walker, James Randa

Proceedings of the 2012 IEEE International Geoscience and Remote Sensing Symposium, 2012

Realization of a standard radiometer for microwave brightness-temperature measurements traceable to fundamental noise standards.

Dazhen Gu, Derek Houtz, James Randa, David K. Walker

Proceedings of the 2012 IEEE International Geoscience and Remote Sensing Symposium, 2012

2011

Verification of Noise-Parameter Measurements and Uncertainties.

James Randa, Joel Dunsmore, Dazhen Gu, Ken Wong, David K. Walker, Roger D. Pollard

IEEE Trans. Instrum. Meas., 2011

Reflectivity Study of Microwave Blackbody Target.

Dazhen Gu, Derek Houtz, James Randa, David K. Walker

IEEE Trans. Geosci. Remote. Sens., 2011

Extraction of reflectivity from microwave blackbody target with free-space measurements.

Dazhen Gu, Derek Houtz, James Randa, David K. Walker

Proceedings of the 2011 IEEE International Geoscience and Remote Sensing Symposium, 2011

2010

Comparison of microwave black-body target radiometric measurements.

David K. Walker, Dazhen Gu, Katherine MacReynolds, Randy Direen, James Randa, Amanda E. Cox, Derek Houtz, Robert L. Billinger

Proceedings of the IEEE International Geoscience & Remote Sensing Symposium, 2010

Reflectivity studies of passive microwave calibration targets and absorptive materials.

Dazhen Gu, Amanda E. Cox, Derek Houtz, David K. Walker, James Randa, Robert L. Billinger

Proceedings of the IEEE International Geoscience & Remote Sensing Symposium, 2010

2009

Variable Termination Unit for Noise-Parameter Measurement.

Dazhen Gu, David K. Walker, James Randa

IEEE Trans. Instrum. Meas., 2009

2007

On-Wafer Measurement of Transistor Noise Parameters at NIST.

James Randa, David K. Walker

IEEE Trans. Instrum. Meas., 2007

2005

Systematic errors of noise parameter determination caused by imperfect source impedance measurement.

Wojciech Wiatr, David K. Walker

IEEE Trans. Instrum. Meas., 2005

Errors resulting from the reflectivity of calibration targets.

James Randa, David K. Walker, Amanda E. Cox, Robert L. Billinger

IEEE Trans. Geosci. Remote. Sens., 2005

2004

Nonlinear modeling of tunnel diode detectors.

David K. Walker, Kevin J. Coakley, Jolene D. Splett

Proceedings of the 2004 IEEE International Geoscience and Remote Sensing Symposium, 2004

Errors due to the reflectivity of calibration targets.

James Randa, David K. Walker, Amanda E. Cox, Robert L. Billinger

Proceedings of the 2004 IEEE International Geoscience and Remote Sensing Symposium, 2004

Standard radiometers and targets for microwave remote sensing.

James Randa, Amanda E. Cox, David K. Walker, Michael H. Francis, Jeffrey R. Guerrieri, Katherine MacReynolds

Proceedings of the 2004 IEEE International Geoscience and Remote Sensing Symposium, 2004

1994

Computer science lecture room demonstration experiment in event counting (abstract).

David K. Walker, Hamid Chahryar, James W. Moore, David S. Tucker

Proceedings of the 25th SIGCSE Technical Symposium on Computer Science Education, 1994

1992

Lectureroom demonstration of serial data communications.

David K. Walker, Hamid Chahryar, Jamil Chaudri, Akhtar Lodgher, Elias Majdalani, David S. Tucker

Proceedings of the 23rd SIGCSE Technical Symposium on Computer Science Education, 1992

1991

Managing hard-disk PCs in the introductory laboratory.

David K. Walker, David S. Tucker

ACM SIGCSE Bull., 1991