RHESSI Tohban Report, 14-apr-2003 to 21-apr-2003 Hugh Hudson, hhudson@ssl.berkeley.edu Ayumi Asai, asai@ssl.berkeley.edu Jim McTiernan, jimm@ssl.berkeley.edu (1) Solar Activity: We had a spurt of activity, including an M flare on April 18. Hoping for the best. (2) Attenuators: The attenuators remained in autonomous mode all week. (3) Memory Management/Decimation tables: Nominal. Because of the slightly increased activity, we were bottoming out at about 10% SSR some days. (4) Things noted The spin period was corrected this week, as reflected in the daily SOH plot on http://hessi.ssl.berkeley.edu/hessidata/metadata/hsi_1day_sohdata/data/hsi_1day_spin_rate.gif But this shows a peculiarity that this group of tohbans has not quite figured out. Prior to the correction, the spin rate stopped its regular decrease and hovered around a constant value. Judging from the plot, this is the first time this has happened. Why? The cryo current is approaching 2.3A now, and the cryo power is poking its head abovev 58 W. The plot of "battery voltage vs solar array current" http://hessi.ssl.berkeley.edu/hessidata/metadata/hsi_1day_sohdata/data/hsi_1day_batt_volt_x_sa_curr.gif is really interesting. (5) Data Gaps: There were no known intentional data gaps. (6) Tohban: The bearer of the beeper will be Jim McTiernannext week.