David K. Walker

Publication Activity (10 Years)

Years Active: 1991-2020
Publications (10 Years): 4

Top Topics

Image Irradiance

Radially Symmetric

Top Venues

IEEE Trans. Geosci. Remote. Sens.

IEEE Geosci. Remote. Sens. Lett.

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

Publications

Kevin J. Coakley, Jolene D. Splett, David K. Walker, Mustafa Aksoy, Paul E. Racette
Microwave Radiometer Instability Due to Infrequent Calibration. IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens. 13 (2020)
Derek A. Houtz, William J. Emery, Dazhen Gu, David K. Walker
Brightness Temperature Calculation and Uncertainty Propagation for Conical Microwave Blackbody Targets. IEEE Trans. Geosci. Remote. Sens. 56 (12) (2018)
Derek A. Houtz, William J. Emery, Dazhen Gu, Karl Jacob, Axel Murk, David K. Walker, Richard J. Wylde
Electromagnetic Design and Performance of a Conical Microwave Blackbody Target for Radiometer Calibration. IEEE Trans. Geosci. Remote. Sens. 55 (8) (2017)
Derek A. Houtz, David K. Walker, Dazhen Gu
Simulations to characterize a passive microwave blackbody design. IGARSS (2015)
Dazhen Gu, James Randa, David K. Walker
A Geometric Error Model for Misaligned Calibration Target in Passive Microwave Remote-Sensing Systems. IEEE Geosci. Remote. Sens. Lett. 10 (6) (2013)
Derek Houtz, David K. Walker
A finite element thermal simulation of a microwave blackbody calibration target. IGARSS (2013)
Dazhen Gu, Derek Houtz, James Randa, David K. Walker
Extraction of Illumination Efficiency by Solely Radiometric Measurements for Improved Brightness-Temperature Characterization of Microwave Blackbody Target. IEEE Trans. Geosci. Remote. Sens. 50 (11) (2012)
Derek Houtz, Dazhen Gu, David K. Walker, James Randa
An investigation of antenna characterization techniques in microwave remote sensing calibration. IGARSS (2012)
Dazhen Gu, Derek Houtz, James Randa, David K. Walker
Realization of a standard radiometer for microwave brightness-temperature measurements traceable to fundamental noise standards. IGARSS (2012)
Dazhen Gu, Derek Houtz, James Randa, David K. Walker
Reflectivity Study of Microwave Blackbody Target. IEEE Trans. Geosci. Remote. Sens. 49 (9) (2011)
James Randa, Joel Dunsmore, Dazhen Gu, Ken Wong, David K. Walker, Roger D. Pollard
Verification of Noise-Parameter Measurements and Uncertainties. IEEE Trans. Instrum. Meas. 60 (11) (2011)
Dazhen Gu, Derek Houtz, James Randa, David K. Walker
Extraction of reflectivity from microwave blackbody target with free-space measurements. IGARSS (2011)
David K. Walker, Dazhen Gu, Katherine MacReynolds, Randy Direen, James Randa, Amanda E. Cox, Derek Houtz, Robert L. Billinger
Comparison of microwave black-body target radiometric measurements. IGARSS (2010)
Dazhen Gu, Amanda E. Cox, Derek Houtz, David K. Walker, James Randa, Robert L. Billinger
Reflectivity studies of passive microwave calibration targets and absorptive materials. IGARSS (2010)
Dazhen Gu, David K. Walker, James Randa
Variable Termination Unit for Noise-Parameter Measurement. IEEE Trans. Instrum. Meas. 58 (4) (2009)
James Randa, David K. Walker
On-Wafer Measurement of Transistor Noise Parameters at NIST. IEEE Trans. Instrum. Meas. 56 (2) (2007)
James Randa, David K. Walker, Amanda E. Cox, Robert L. Billinger
Errors resulting from the reflectivity of calibration targets. IEEE Trans. Geosci. Remote. Sens. 43 (1) (2005)
Wojciech Wiatr, David K. Walker
Systematic errors of noise parameter determination caused by imperfect source impedance measurement. IEEE Trans. Instrum. Meas. 54 (2) (2005)
James Randa, Amanda E. Cox, David K. Walker, Michael H. Francis, Jeffrey R. Guerrieri, Katherine MacReynolds
Standard radiometers and targets for microwave remote sensing. IGARSS (2004)
James Randa, David K. Walker, Amanda E. Cox, Robert L. Billinger
Errors due to the reflectivity of calibration targets. IGARSS (2004)
David K. Walker, Kevin J. Coakley, Jolene D. Splett
Nonlinear modeling of tunnel diode detectors. IGARSS (2004)
David K. Walker, Hamid Chahryar, James W. Moore, David S. Tucker
Computer science lecture room demonstration experiment in event counting (abstract). SIGCSE (1994)
David K. Walker, Hamid Chahryar, Jamil Chaudri, Akhtar Lodgher, Elias Majdalani, David S. Tucker
Lectureroom demonstration of serial data communications. SIGCSE (1992)
David K. Walker, David S. Tucker
Managing hard-disk PCs in the introductory laboratory. ACM SIGCSE Bull. 23 (4) (1991)