Apogee kick motor possible. The mass of most geostationary satellites at the beginning of its operational life in geostationary orbit is roughly half that when it separated from its vehicle in geostationary transfer orbit, with the other half having been fuel expended in the apogee kick maneuver. Apogee kick motor An apogee kick motor (AKM) refers to a rocket motor that is regularly employed on artificial satellites to provide the final impulse to change the trajectory from the transfer orbit into its final (most commonly circular) orbit. For a satellite launched from the Earth, the rocket firing is done at the highest point
Word sort Word sort A word sort is a developmental word study activity espoused by the "Words Their Way" curriculum as written by Donald R. Bear, Marcia Invernizzi, Shane Templeton, and Francine Johnston. The activity focuses students' attention on critical features of words, namely sound, pattern, and meaning. Recent descriptions of comprehensive vocabulary programs identify fostering word consciousness (getting students really interested in and excited about words) as a crucial component of effective programs. Word sorts are a method to foster word consciousness. The process of sorting words into various categories is the heart of word study. By categorizing different words by