Flight 188 - uppsagd

Data relating to Flight 188The purpose of the following ballistic phase is to ensure:• Pointing of the upper composite in the direction required by HERSCHEL and PLANCKand then in that required for SYLDA 5,• triple-axis stabilization of the launcher before separation of HERSCHEL,• triple-axis stabilization of the launcher before separation of SYLDA 5,• slow spin-up at 6°/s before separation of PLANCK,• separation of HERSCHEL, SYLDA 5 and PLANCK,• final spin-up of the composite at 45°/s,• passivation of the ESC-A stage pressurized LOX tank and LH 2 tank, preceded by a prepassivationphase involving simultaneous opening of the eight SCAR nozzles.These operations contribute to short- and medium-term management of the mutual distancingof objects in orbit.The ballistic phase for the mission comprises 17 elementary phases described hereafter. Theseinclude separation of HERSCHEL (phase 2), SYLDA 5 separation (phase 4), and PLANCKseparation (phase 8).13