Request for CDS, SUMER, MDI & EIT --------------------------------- Chromospheric Oscillations -------------------------- J.G. Doyle. ----------- Currently I am putting to-gether a CDS/SUMER observational sequence to look for 3-6 min chromospheric oscillations. At present I have developed a series of sequences to measure lines with a range of formation temperatures; e.g. continuum regions to diagnostic the <8000K plasma, C I for the 8000K plasma, Si II/C II for the 10,000-20,000K plasma, O IV/O V lines for the transition region at 100,000-250,000K, and Mg X, Fe XII & Fe XIII for the coronal plasma. It is unlikely that we will see oscillations up to such high temperatures, but in addition, these sequences will give the electron density at 100,000K and 1000,000K on a time resolution of 15sec for a period of approx. 2hr duration during the planned 8hr sequence. Furthermore, data concerning explosive events will be fore-coming from these sequences due to the time resolution, duration and range of temperature formation studied. In order to explore this data properly, one requires a knowledge of the magnetic field structure, hence MDI & EIT. We would like information from MDI concerning photospheric flow patterns and on the overall magnetic structure. EIT data is required in order to give details on the structure at coronal temperatures. The planned sequence will last approx. 8hr, we would request at two runs of this sequence, (i) a quiet region and (ii) an active region. If possible, I would request time on CDS, SUMER, MDI & EIT during the week of July 21. Outline of CDS (names and order of sequences) - --------------------------------------------- Sequence Purpose Area -------- ------- ---- FAST_NE4 90 min .. Ne diag. at 1000,000K 4x120 arcsec CHROM_N4 71 .. .. He I, O IV, Mg X, O V ... FAST_NE4 90 .. .. Ne diag. at 1000,0000K ... CHROM_G4 70 .. .. all lines 4x4 ... FAST_NE4 90 .. .. Ne diag. at 1000,000K 4x120 ... CHROM_N3 67 .. .. O IV, Mg X, OV 8x120 ... time resolution is 14-40 sec Outline of SUMER (names and order of sequences) - ----------------------------------------------- Sequence Purpose Area -------- ------- ---- O4_TIME_NE 68 min .. Ne diag. at 100,000K 1x120 arcsec FE12_OSCIL 51 .. .. NV, Fe XII, cont ... C4_OSC 67 .. .. C IV, Si II, cont ... O4_TIME_NE 68 .. .. Ne diag. at 100,000K ... C2_OSCIL 68 .. .. C II, C I, cont ... C4_OSC 67 .. .. C IV, Si II, cont ... time resolution is approx. 15-20 sec Outline of MDI requirements - --------------------------- High resolution Outline of EIT requirements - ---------------------------