This application provides a method and
system for correcting the
brightness temperature of a spaceborne one-dimensional integrated aperture
microwave radiometer. The method includes: acquiring two-dimensional observed
brightness temperature data O along the vertical
satellite orbit and along the
satellite orbit for different ascent and descent orbits of the
microwave radiometer; acquiring
external data such as atmospheric profiles, surface data, and sea surface
salinity along the
radiation transmission path to obtain simulated Earth
radiation brightness temperature data B, and removing
outlier data; subtracting the observed brightness temperature data from the simulated brightness temperature data to obtain O-B data for multiple single orbits, and removing
outlier data; taking the median of the O-B data to obtain the average difference in O-B brightness temperature and the two-dimensional corrected brightness temperature; dividing the average difference in O-B brightness temperature by the observed brightness temperatures in the corresponding two vertical directions to obtain two-dimensional relative brightness
temperature correction coefficients based on different ascent and descent orbits; and correcting the observed brightness temperature using the two-dimensional relative brightness
temperature correction coefficients or the two-dimensional corrected brightness temperature. The
advantage of this application is that the established two-dimensional correction coefficients have a better correction effect.