Ground-Based Microwave Radiometer Calibration: an Overview

Author(s)

Marcelo Miacci ^[1] ; Carlos Frederico Angelis ^[2]

Affiliation

^[1] Centro Nacional de Monitoramento e Alertas de Desastres Naturais - Brasil

^[2] Centro Nacional de Monitoramento e Alertas de Desastres Naturais - Brasil

• Document type: Journal article
• Source: J. Aerosp. Technol. Manag.; v. 10, 2018-07-16.

Abstract

ABSTRACT This paper intends to briefly present some basic concepts on the microwave radiometry and radiometer calibration research in remote sensing applications and demonstrate results and analysis of the cryogenic calibration of a microwave ground-based radiometer currently deployed in scientific campaigns in Brazil. The equipment described in this text operates at 22 - 30 GHz and at 51 - 59 GHz frequency ranges and uses as the calibration standard a target cooled by liquid nitrogen. Since an accurate calibration (with observation errors below 0.5 K) is important to provide confidence in the retrieval of vertical temperature and humidity profiles, this work aims also to comment on some effects of the errors in calibration procedure on the atmospheric parameters of interest. (AU)

• FAPESP's process: 09/15235-8 - Cloud processes of the main precipitation systems in Brazil: a contribution to cloud resolving modeling and to the GPM (Global Precipitation Measurement)
• Grantee: Luiz Augusto Toledo Machado
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 11/03093-4 - Retrieval of Atmospheric Parameters using Surface-Based Microwave Radiometry
• Grantee: Marcelo Alexandre Souza Miacci
• Support Opportunities: Scholarships in Brazil - Post-Doctoral