! File: 3203C.PROP ! Database: PEPDB ! Date: 18-FEB-1994:21:48:43 coverpage: title_1: JUPITER - SOLAR SYSTEM (WF/PC-22) title_2: CYCLE 1 sci_cat: SOLAR SYSTEM proposal_for: GTO/WFC cont_id: 1126 pi_title: PROF. pi_fname: JAMES pi_mi: A. pi_lname: WESTPHAL pi_inst: CALTECH pi_country: USA pi_phone: (818) 356-4900 keywords_1: JUPITER, ATMOSPHERE DYNAMICS hours_pri: 2.61 num_pri: 1 pi_position: PROFESSOR OF PLANETA ! end of coverpage abstract: line_1: This program will obtain two four-color complete 360 degree maps with the WF/PC line_2: to measure the Jovian atmospheric motion. The first set will be obtained line_3: within a ten-hour period to allow for adequate overlap between the longitudinal line_4: strips. Then twenty hours later a second map set will be obtained to complete line_5: the dynamical set. Since Jupiter rotates approximately fifty degrees per HST line_6: orbit, these dynamical sets should be obtained for eight sequential orbits. UV line_7: imaging at the high spatial resolution of HST provides an excellent method of line_8: studying the upwelling processes, especially in the time domain. ! ! end of abstract general_form_proposers: lname: WESTPHAL fname: JAMES mi: A. inst: CALTECH country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: The dynamics of the Jovian atmosphere will yield new scientific insight into line_2: two main areas: 1) the energy balance in the convective envelope and line_3: atmosphere, and 2) the mechanism for maintaining large scale systems in the line_4: atmosphere. The Voyager spacecraft obtained high resolution views of this line_5: turbulent atmosphere. The dynamical set obtained with the WF/PC will allow a line_6: direct comparison of the wind fields and evolutionary properties of cloud line_7: systems with the Voyager data sets obtained 6 months apart in 1979. The line_8: observing sequence will consist of a four-color longitude map obtained within a line_9: ten-hour period. Then twenty hours later a second map set should be obtained line_10: to complete the dynamical set. Since Jupiter rotates approximately 50 degrees line_11: per HST orbit, this dynamical set should be obtained for seven sequential line_12: orbits. This will provide a multicolor map with complete longitude coverage. line_13: The filters have been chosen to optimize the contrast of the atmospheric line_14: features from ground-based and Voyager data analysis (F336M, F439M, F718M, and line_15: F889N). The two full rotation data sets would contain image pairs separated in line_16: time by 30 hours with similar central meridians. Hence, velocity errors and line_17: limb-darkening and various foreshortening effects will be minimized. line_19: The exploration in the near- and vacuum-UV will produce new data at a spatial line_20: resolution never obtained in this spectral region. From the preliminary line_21: information gathered by the instruments on the Pioneer and Voyager spacecrafts, line_22: it appears that the Jovian atmosphere is strongly convective in localized line_23: regions. At least one well known atmospheric constituent, ammonia, condenses ! question: 2 section: 2 line_1: during the upwelling process, as evident in the Jovian images that show white line_2: reflective regions near shear zone edges in the south tropical zones and in the line_3: white ovals. Limited spectral data from IUE show some evidence for gaseous line_4: absorption by ammonia, indicating that the gas must be out of local line_5: thermodynamic equilibrium, probably as a result of the rapid upwelling process. line_6: Moderate bandwidth UV imaging at high spatial resolution of HST covering the line_7: regions of known absorption bands and nearby continuum (170 - 210 nm) provides line_8: an excellent method of studying the upwelling processes, especially in the time line_9: domain. ! question: 3 section: 1 line_1: Since Jupiter rotates approximaely 50 degrees per HST orbit, this dynamical set line_2: should be obtained for seven sequential orbits. This will provide a multicolor line_3: map with complete longitude coverage. The filters have been chosen to optimize line_4: the contrast of the atmospheric features from ground-based and Voyager data line_5: sets would contain image pairs separated in time by 30 hours with similar line_6: central meridians. Hence, velocity errors and limb-darkening and various line_7: foreshortening effects will be minimized. line_9: Complete sets to be obtained in Cycles 1 and 2. line_11: comment continuation from CP11: sequential orbits required, planetary tracking line_12: required. ! question: 13 section: 1 line_1: Imaging observations of the Jovian atmosphere in four filters (F336M, F439M, line_2: F718M, and F889N) will yield new scientific insight into two main areas: 1) line_3: the energy balance in the convective envelope and atmosphere, and 2) the line_4: mechanism for maintaining large scale systems in the atmosphere. This will line_5: provide a multicolor map with complete longitude coverage. The filters have line_6: been chosen to optimize the contrast of the atmospheric features from line_7: ground-based and Voyager data analysis. ! !end of general form text general_form_address: lname: WESTPHAL fname: JAMES mi: A. category: PI inst: CALTECH ! lname: GUNN fname: JAMES mi: E. category: CON inst: PRINCETON UNIVERSITY addr_1: ASTROPHYSICAL SCIENCE addr_2: PEYTON HALL city: PRINCETON state: NJ zip: 08540 country: USA ! lname: FABER fname: SANDRA mi: M. category: CON inst: UC SANTA CRUZ - LICK OBSERVATORY addr_1: NATURAL SCIENCE II, BLDG. 160 city: SANTA CRUZ state: CA zip: 95064 country: USA ! lname: DANIELSON fname: G. EDWARD category: CON inst: CALTECH addr_1: M/S 170-25 addr_2: DIVISION OF GEOLOGICAL & PLANETARY SCIENCES city: PASADENA state: CA zip: 91125 country: USA phone: (818) 356-4900 ! ! end of general_form_address records ! No fixed target records found solar_system_targets: targnum: 1 name_1: JUPITER descr_1: PLANET JUPITER lev1_1: STD=JUPITER ! ! end of solar system targets ! No generic target records found exposure_logsheet: linenum: 7.000 targname: JUPITER config: WFC opmode: IMAGE aperture: W1 sp_element: F194W num_exp: 1 time_per_exp: 60S priority: 2 param_1: PRE-FLASH=YES, param_2: CR-SPLIT=NO req_1: GUID TOL 0.030" / 7-8; req_2: CYCLE 2 / 7-8; req_3: AT 01-MAR-1992 +/- 30D; req_4: GROUP 7-8 NO GAP ! linenum: 8.000 targname: ^ config: WFC opmode: ^ aperture: ^ sp_element: F230W num_exp: ^ time_per_exp: ^ priority: ^ param_1: ^ comment_1: EXPOSURE SET BY PLANET ROTATIONAL comment_2: SMEAR. ! ! end of exposure logsheet ! No scan data records found