Geolocation accuracy is an important factor for remote sensing applications. In order to improve the geolocation accuracy of FY-3B/MERSI (medium resolution spectrum imager) data

we analyze how the installation matrix impacts the accuracy of the geolocation results. When the instrument coordinate system rotates around the X-axis

Y-axis and Z-axis

the remote sensing images will shift left or right

up or down

and they will rotate. According to the relationship of ground control points and land-sea mask to estimate the error of the installation matrix

the accuracy of the image geolocation results can be about one pixel. The geolocation results from the operate system updated the installation matrix are stable and reliable. The new matrix includes not only the relationship between the installation of the instrument and the satellite platform

but also the systematic bias of the internal device due to vibration

environmental changes and measurement errors of the satellite’s position

velocity

and attitude.