Performance Assessment of the Passive Microwave Electric Field Retrieval Algorithm with TRMM Satellite Observations

16 March 2017

Peterson et al. (2015) developed an algorithm for estimating the electric field vector at any point above an electrified cloud from passive microwave observations. It is constructed using NASA ER-2 high-altitude aircraft electric field and passive microwave measurements. The present study constructs a version of the Peterson et al. (2015) algorithm for use with Precipitation Measurement Mission (PMM) satellite datasets.

M. J. Peterson, W. Deierling, C. Liu, D. Mach, and C. Kalb

Journal of Atmospheric and Oceanic Technology, UNDER REVIEW

Picture Caption: 

Example TRMM MCS. TMI 85 GHz brightness temperatures (top), and electric field strength and horizontal vectors (bottom).

A method of estimating electric fields above electrified clouds from passive microwave observations

16 March 2017

An algorithm is presented for estimating the total three-dimensional electric field vector at an arbitrary point over electrified weather from 37 GHz or 85 GHz passive microwave measurements. These frequencies are sensitive to column ice, which is important for electrification. The algorithm uses the geospatial distribution of ice mass as a proxy for charge accumulation across the microwave scene and then employs Coulomb’s Law to approximate the orientation and relative strength of the electric field vector that would be felt by an observer at a specified position and altitude.

M. J. Peterson, W. Deierling, C. Liu, D. Mach, and C. Kalb

Picture Caption: 

Example ER-2 Overflight. Electric fields measured by the field mills (thick line) are compared against the passive microwave estimates (thin line). The percent error is also shown (dotted line)

Subscribe to RSS - er2