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Open AccessArticle

Onboard Radio Frequency Interference as the Origin of Inter-Satellite Biases for Microwave Humidity Sounders

Meteorologisches Institut, Centrum für Erdsystem- und Nachhaltigkeitsforschung (CEN), Universität Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany
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Remote Sens. 2019, 11(7), 866; https://doi.org/10.3390/rs11070866
Received: 29 January 2019 / Revised: 5 April 2019 / Accepted: 6 April 2019 / Published: 10 April 2019
(This article belongs to the Special Issue Radio Frequency Interference (RFI) in Microwave Remote Sensing)
Understanding the causes of inter-satellite biases in climate data records from observations of the Earth is crucial for constructing a consistent time series of the essential climate variables. In this article, we analyse the strong scan- and time-dependent biases observed for the microwave humidity sounders on board the NOAA-16 and NOAA-19 satellites. We find compelling evidence that radio frequency interference (RFI) is the cause of the biases. We also devise a correction scheme for the raw count signals for the instruments to mitigate the effect of RFI. Our results show that the RFI-corrected, recalibrated data exhibit distinctly reduced biases and provide consistent time series. View Full-Text
Keywords: microwave humidity sounders; inter-satellite biases; radio frequency interference; consistent time series microwave humidity sounders; inter-satellite biases; radio frequency interference; consistent time series
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Hans, I.; Burgdorf, M.; Buehler, S.A. Onboard Radio Frequency Interference as the Origin of Inter-Satellite Biases for Microwave Humidity Sounders. Remote Sens. 2019, 11, 866.

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