Mwr Smear Effect: A Counts-Level Empirical Correction And Possible Causes

Keywords

Brightness temperatures (TB); microwave radiometer (MWR); smear effect

Abstract

The microwave radiometer (MWR) is a Dicke radiometer on board of the Aquarius (AQ)/SAC-D satellite. It was developed by Argentine space agency, Comisión Nacional De Actividades Espaciales (CONAE), and operates at 23.8 and 36.5 GHz frequencies. After MWR initially turned on, the first brightness temperature Ts measurements were obtained, observing an anomalous recurrent effect when analyzing land/water crossings. The effect is present for all frequencies and earth incidence angles (EIAs) and results in a smearing of Ts observations near strong contrast radiometric scenes. This paper summarizes the main features and discoveries around this anomaly leading to a general description of the problem: coupling of sequential MWR measurements. Consequently, an empirical correction algorithm is derived and validated. Also, possible causes are investigated.

Publication Date

12-1-2015

Publication Title

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing

Volume

8

Issue

12

Number of Pages

5468-5473

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/JSTARS.2015.2448512

Socpus ID

84938785333 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84938785333

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