Tipping-Curve Calibration of Space-Based Passive Microwave Radiometers.
advances in radio-frequency device technology have enabled the development of miniature
passive radiometers with unprecedented reductions in mass, power, and cost. These
advances have facilitated the deployment of ultracompact radiometer payloads on
"micro-satellites" for Earth remote sensing applications. The micro-satellite approach
offers several key advantages for current ... read moreand emerging Department of Commerce (DOC),
National Oceanic and Atmospheric Administration (NOAA), National Aeronautics and Space
Administration (NASA), and Department of Defense (DOD) needs, including rapid
deployability, fault tolerance, and cost reduction. A major remaining challenge in the
practical use of micro-satellites for high-fidelity atmospheric studies is the on-orbit
calibration of the radiometer transfer functions, which often depend in a complicated
way with the sensor's time-evolving thermal and radiometric states. In this thesis, a
new calibration methodology is explored for space-based Earth remote sensing. The
tipping-curve calibration scheme, a commonly used ground-based technique, has been
adapted for use in space-based systems. A statistical maximum a posteriori estimation
technique is used that leverages tipping curve measurements to find calibration
parameters. A model-based approach is used to prove the effectiveness of the
Thesis (M.S.)--Tufts University, 2011.
Submitted to the Dept. of Electrical Engineering.
Advisors: Eric Miller, and Vincent Leslie.
Committee: Ronald Lasser.
Keywords: Remote sensing, Environmental studies, and Electrical engineering.read less