From the Cassini/Huygens 10/25/04 press release:<br /><br />"This is not the same white-knuckle situation we had during Saturn orbit insertion, but there are some things we can't control," said Earl Maize, deputy project manager for the Cassini-Huygens mission at JPL. "If a spacecraft anomaly should occur, or if the weather at the tracking stations does not cooperate, the science return may be limited or lost. Although this is an unlikely scenario, the possibility still exists." Cassini will have only one opportunity to send the data back to Earth before the data are overwritten on the recorders by data from the next set of observations. The first downlink of data by NASA's Deep Space Network occurs at 6:30 p.m. PDT."<br /><br /><br />This is from the Flyby Mission Description on the Cassini homepage:<br /><br />"1.4 TA DATA RECORDING AND PLAYBACK<br />The Titan-A data recording and playback strategy is the same as the nominal tour strategy,<br />with one notable exception. INMS and AACS data collected at closest approach will be<br />rerouted to partition 5 and saved until near the end of the downlink pass, so that it may be<br />played back over two complexes. This was done to further ensure successful playback as<br />these data sets contribute to the minimum Titan altitude and Huygens mission.<br />Goldstone’s 70m station is down for nearly the entire latter half of 2004 for preventitive<br />maintenance and upgrades, so the high priority science is played back over Madrid’s 70m<br />dish. Goldstone’s 34m HEF station comes up near the end of the pass as the redundant<br />station for INMS and AACS data playback.<br />A detailed time ordered description of the data playback is shown on the following pages.<br />The SSR is nearly filled during the flyby with a total of 3.5 Gbit of data. Playback begins on<br />DOY 301 at 00:16 (spacecraft time) and completes at 09:16. Dual playback to both Madrid<br />and Goldstone takes place during the last hour of the downlink (08:16-09:16 SCET).