A Method for Real-Time Navigation of AVHRR Imagery

Signals received from the NOAA series of satellites provide imagery of the Earth's cloud cover in real time as the satellite passes over the receiving site. In order for these data to be immediately useful to the meteorologist or other user requiring current data, it is important that the images should be correctly navigated, i. e., that they should have lines of latitude and-longitude, and land outlines, superimposed on them. The method described in this paper allows this to be done by prediction using satellite ephemerides.