What question did this study set out to answer?

The aim is to assess how local TOVS observations can enhance meteorological data for forecasting.

February 5, 2026

Real-time assimilation and synoptic application of local TOVS raw radiance observations

Key Points

The aim is to assess how local TOVS observations can enhance meteorological data for forecasting.
Real-time retrieval of TOVS radiances by the Australian Bureau of Meteorology
Determination of cloud height and ozone using specific algorithms
Numerical experiments using local TOVS data along with NESDIS low resolution data to evaluate impact on forecasts
Improved numerical forecasts in the Australian region when using locally processed TOVS data
Demonstrated potential for TOVS data to positively impact operational weather prediction systems

Abstract

This paper describes the physically based, real-time TOVS (TIROS Operational Vertical Sounder) retrieval system currently employed in the Australian Bureau of Meteorology to generate meteorological fields from locally received TOVS raw radiances. It summarises the cloud height and ozone determination methods and the radiance and transmittance tuning techniques employed in the system. It discusses the synoptic application of the data and recent numerical experiments designed to investigate the impact of locally processed TOVS data from the system on operational Australian region numerical weather prediction. These experiments, performed in a data environment which already included National Environmental Satellite Data Information Service (NESDIS) low resolution TOVS data and locally generated cloud-drift winds, indicated the potential of these data to improve numerical forecasts in the Australian region. The system is now used to provide data for direct use in the operational regional analysis prognosis system (RASP).

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