Chris Ruf

Frederick Bartman Collegiate Professor of Climate and Space Science Graduate advisor Program: Ph.D. Concentration in Geoscience and Remote Sensing

Climate and Space Sciences and Engineering

CSRB 2527A

Climate & Space Research Building University of Michigan 2455 Hayward Street Ann Arbor, MI 48109-2143

(734) 764-6561

Ph.D., Electrical & Computer Engineering, University of Massachusetts, Amherst
B.A., Physics, Reed College

Earth and Planetary Remote Sensing

Principal Investigator, NASA Cyclone Global Navigation Satellite System Earth Venture Mission

Earth Environmental Remote Sensing:
- Global Navigation Satellite System Mission Execution
- Design and fabrication of next-generation satellite microwave radiometers
- Novel methods for maintaining high accuracy and stability calibration of satellite sensors to detect minute global change signatures
- Application of inversion techniques and multi-sensor assimilation to remote sensing
- Hardware and algorithmic aspects of satellite microwave radiometry
Synthetic thinned aperture radiometry
Mitigation of radio frequency interference
Self-contained end-to-end radiometer calibration system
Use of stationary statistical properties of upwelling radiances to constrain absolute accuracy and long term stability of satellite measurements
Profiling of lower, middle and upper atmosphere using multispectral, multisensor and climatological databases

Instrument Scientist, NASA TOPEX Microwave Radiometer
Principal Investigator, Calibration/validation of US Navy GEOSAT Follow-On Water Vapor Radiometer
Science Team Member, NASA Jason-1 Microwave Radiometer
Science Team Member, NASA Aquarius Microwave Radiometer
Developed new method for estimating the depth of the marine boundary layer (BLD) from space using horizontal turbulence structure of vertically integrated atmospheric water vapor
Developed new method for absolute and relative calibration of spaceborne microwave radiometers using lower bound on a cumulative statistic of the measured radiance
Advanced technologies in support of synthetic thinned aperture radiometer (STAR) in space (antenna arrays, real/synthetic aperture sharing, digital correlators, calibration techniques)
Derived correction to standard model for pressure broadening of atmospheric absorption line of water vapor at 22.235 GHz based on microwave spectrometer observations
2014 IEEE Geoscience and Remote Sensing Society Outstanding Service Award
2006 International Geoscience and Remote Sensing Symposium Prize Paper Award for Detection of RFI by its Amplitude Probability Distribution

Fellow, IEEE (2001)
IEEE Judith A. Resnik Technical Field Award, Contributions to the absolute calibration of spaceborne microwave radiometers (1999)
IEEE Transactions on Geoscience & Remote Sensing Prize Paper Award, Retrieval of tropospheric water vapor scale height from horizontal turbulence (1997)
NASA Group Achievement Award, Juno Proposal Team (2012)
NASA Group Achievement Award, Aquarius Launch, Early Orbit Operations, and Commissioning (2012)
NASA Group Achievement Award, Genesis and Rapid Intensification Processes (GRIP) Airborne Earth Science Mission (2011)
NASA Group Achievement Award, Lightweight Rainfall Radiometer (2004)
NASA Group Achievement Award, TOPEX Joint Verification Team (1994)
NASA Group Achievement Award, TOPEX precision orbit determination (1993)
NASA Group Achievement Award, TOPEX Microwave Radiometer (1993)
NASA Certificate of Recognition, Piezoelectric reflecting array for reflector surface distortion compensation (1992)
NASA Certificate of Recognition, Synthetic aperture interferometric radiometer image reconstruction error analysis (1992)
NASA Certificate of Recognition, Sparse aperture interferometric radiometer – Refining the two-dimensional antenna configuration (1990)

http://ktb.engin.umich.edu/RSG/pubs.htm