RHESSI Tohban report, 26-Jul-2004 to 02-Aug-2004 Martin Fivian, mfivian@ssl.berkeley.edu 1. Solar Activity At the beginning of the week, the active region 0652 still produced some moderately high solar activity including a few M-flares but no X-flares. On July 29 it turned around the West limb and solar activity was low with two small active regions on the disk (654 and 655). The base level decayed slowly to be about A7. Particle events increased dramatically during the first half of the week and produced several huge storms before the weekend which became an issue concerning memeory management (see below). The number of paritcle events is now decreasing again. Statistics are as follows: How many GOES flares occurred? Flares above B, C, M, X class were 21 28 6 0 And how many of these are listed in the RHESSI flare list? Flares above B, C, M, X class were 4 15 5 0 And how many had EXCELLENT coverage? Flares above B, C, M, X class were 4 8 0 0 There were RHESSI flares/GOES flares 74 / 55 over the time range 26-Jul-04 02-Aug-04 2. Decimation With the increase of particle events the decimation has been increase from ACTIVE/NORMAL at beginning of the week as follows: change to ACTIVE/ACTIVE at 2004-210-19:42:59 UTC change to ACTIVE/VIGOROUS at 2004-211-03:37:50 UTC 3. Memory Management The increase of the decimation level and the few extra passes weren't saving enough memory to deal with huge number of particle events. After the active region 0652 turned around the West limb the data from July 30, 00:32 to July 31, 05:44 as been deleted by resetting the write pointing. This brought the SSR fill level down to below 30 % on July 31. Nevertheless, the particle rate is still to high to keep up with the data downlink. By beginning of the sequence of Berkeley passes on August 02 the SSR was at about 55 %. 4. Data Gaps APP_ID=102 2004-07-27T04:55:00.000 -- 2004-07-27T05:05:00.000 600.00000 2004-07-27T05:25:00.000 -- 2004-07-27T05:30:00.000 300.00000 2004-07-27T05:35:00.000 -- 2004-07-27T05:45:00.000 600.00000 2004-07-27T05:55:00.000 -- 2004-07-27T06:45:00.000 3000.0000 2004-07-28T17:25:00.000 -- 2004-07-28T17:40:00.000 900.00000 2004-07-28T17:45:00.000 -- 2004-07-28T17:50:00.000 300.00000 2004-07-28T21:25:00.000 -- 2004-07-28T22:25:00.000 3600.0000 2004-07-30T00:30:00.000 -- 2004-07-31T00:00:00.000 84600.000 2004-07-31T00:00:00.000 -- 2004-07-31T05:45:00.000 20700.000 5. Misc Remaining data gaps from last week: 2004-07-19T08:25:00.000 -- 2004-07-19T08:35 2004-07-19T12:05 -- 2004-07-19T12:27