! File: 1206C.PROP ! Database: PEPDB ! Date: 16-FEB-1994:05:57:43 coverpage: title_1: SULFUR NEAR IO title_2: CYCLE 2 sci_cat: SOLAR SYSTEM proposal_for: GTO/HRS cont_id: 1206 pi_fname: LAURENCE pi_mi: M. pi_lname: TRAFTON pi_inst: TEXAS, UNIVERSITY OF pi_country: USA pi_phone: (512)471-1476 keywords_1: IO, SULFUR, JOVIAN TORUS hours_pri: 4.41 num_pri: 3 time_crit: X pi_position: L. TRAFTON, RESEARCH ! end of coverpage abstract: line_1: Neutral sulfur and oxygen, and stages of ionized sulfur have been observed in line_2: Jupiter's torus. Io is supposed to be the source of all torus species but the line_3: mechanism feeding the torus has not been determined. Neutral S should be line_4: densest Io. We will attempt to detect neutral sulfur and oxygen near Io in and line_5: out of the plasma torus in order to shed light on this problem. ! ! end of abstract general_form_proposers: lname: TRAFTON fname: LAURENCE mi: M. inst: TEXAS, UNIVERSITY OF country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: Use J.P.L. ephemeric to set up on Io. Use HRS target acquisition mode to line_2: center on Io. Observe S1296/1479A/1817A; and O1300/1356A near Io through LSA line_3: with medium resolution gratings when Io's geocentric orbital phase line_4: angle is between 45D and 110D. Observe when Io is within 2D and beyond line_5: 5D of the plasma torus equator. line_6: Next, offset 2.5 arcsec from Io towards Jupiter and observe when Io's line_7: orbital elongation is within 45D - 110D for the same two plasma torus line_8: proximities. Obtain Jupiter calibration at center of disk. line_9: Obtain EARTH-CALIB. ! question: 4 section: 1 line_1: UV required line_2: spatial resolution required ! question: 5 section: 1 line_1: Need to observe Io when Jupiter is not nearby and both when Jupiter's magnetic line_2: equator is near and not near Io. line_3: Determine whether ionization by the plasma torus (in the magnetic equator) line_4: either depletes the S near Io or else enhances its emission. ! question: 7 section: 1 line_1: Preliminary reduction of STScI line_3: Final reductions and analysis at U. TX using line_4: Sun 4 Sparkstation. ! question: 8 section: 1 line_1: Neutral sulfur and oxygen emissions near Io will be observed to provide line_2: information on the source mechanism feeding the plasma torus. ! question: 10 section: 1 line_1: VAX 11/780; Sun 4. ! !end of general form text general_form_address: lname: TRAFTON fname: LAURENCE mi: M. category: PI inst: UNIVERSITY OF TEXAS AT AUSTIN addr_1: RLM 16.342 city: AUSTIN state: TX zip: 78712 country: USA ! ! end of general_form_address records ! No fixed target records found solar_system_targets: targnum: 1 name_1: IO-IN descr_1: SATELLITE IO lev1_1: STD = JUPITER lev2_1: STD = IO wind_1: OLG OF IO BETWEEN 45 110, wind_2: CML OF JUPITER FROM IO BETWEEN 92 135, wind_3: SEP OF EUROPA IO FROM EARTH GT 12", wind_4: SEP OF GANYMEDE IO FROM EARTH GT 12", wind_5: SEP OF CALLISTO IO FROM EARTH GT 12", wind_6: WND1= 01-DEC-92 TO 15-MAR-93 comment_1: OBSERVE IO NEAR EASTERN ELONGATION comment_2: WITHIN 2 DEG MAGNETIC LATITUDE OF comment_3: THE PLASMA TORUS EQUATOR. CML OF comment_4: JUPITER IO FROM 274 TO 316 IS ALSO comment_5: ACCEPTABLE. fluxnum_1: 1 fluxval_1: V=5 ! ! end of solar system targets ! No generic target records found exposure_logsheet: linenum: 1.000 targname: IO-IN config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 1.8S fluxnum_1: 1 priority: 1 param_1: BRIGHT=RETURN, param_2: LOCATE=YES, param_3: SEARCH-SIZE=3 req_1: ONBOARD ACQ FOR 1.2; req_2: CYCLE 2/1-3.1; req_3: SEQ 1-3 NO GAP comment_1: DESIRE RETURN TO BRIGHTEST POINT. comment_2: NOTE MOSS WINDOWS comment_3: MAY BE VIOLATED FOR EXP LINES comment_4: 1-2 TO FACILITATE SCHEDULING. ! linenum: 1.200 targname: IO-IN config: HRS opmode: IMAGE aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 97S fluxnum_1: 1 priority: 1 comment_1: TAKE MAP AFTER CENTERING ! linenum: 2.000 targname: WAVE config: ^ opmode: WSCAN aperture: SC2 sp_element: G160M wavelength: 1288-1368 num_exp: 1 time_per_exp: 45S priority: ^ param_2: WAVE-STEP=40 req_1: CALIB FOR 3; req_2: SEQ 2-3 NO GAP ! linenum: 3.000 targname: IO-IN config: ^ opmode: WSCAN aperture: 2.0 sp_element: G160M wavelength: 1288-1368 num_exp: 2 time_per_exp: 16M priority: ^ param_2: WAVE-STEP=40 comment_1: SEE PI IF THERE ARE SCHEDULING comment_2: DIFFICULTIES. ! linenum: 3.010 targname: IO-IN config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 1.8S fluxnum_1: 1 priority: 1 param_1: BRIGHT=RETURN, param_2: LOCATE=YES, param_3: SEARCH-SIZE=3 req_1: ONBOARD ACQ FOR 3.03; req_2: SEQ 3.01-3.1 NO GAP comment_1: DESIRE RETURN TO BRIGHTEST POINT. comment_2: NOTE MOSS WINDOWS comment_3: MAY BE VIOLATED FOR EXP LINES comment_4: 3.01-3.03 TO FACILITATE SCHEDULING. ! linenum: 3.030 targname: IO-IN config: HRS opmode: IMAGE aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 97S fluxnum_1: 1 priority: 1 comment_1: TAKE MAP AFTER CENTERING ! linenum: 3.050 targname: IO-IN config: ^ opmode: WSCAN aperture: 2.0 sp_element: G160M wavelength: 1288-1368 num_exp: 1 time_per_exp: 11M priority: ^ param_2: WAVE-STEP=40 comment_1: SEE PI IF THERE ARE SCHEDULING comment_2: DIFFICULTIES. ! linenum: 3.100 targname: IO-IN config: HRS opmode: ACCUM aperture: 2.0 sp_element: G160M wavelength: 1479 num_exp: 1 time_per_exp: 22M priority: 1 comment_1: OK TO SPLIT UP ALL comment_2: EXPOSURES IN PROPOSAL. ! ! end of exposure logsheet ! No scan data records found