! File: 2169C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:02:23:30 coverpage: title_1: OLT RADIATION MONITORING-I proposal_for: SV/OLT pi_title: DR. pi_fname: H. pi_mi: S. pi_lname: STOCKMAN pi_inst: STSCI pi_country: USA pi_phone: (301)3384820 hours_pri: 108.00 hsp: Y time_crit: Y ! end of coverpage abstract: line_1: High energy particles trapped in the radiation belts, primarily line_2: the South Atlantic Anomaly (SAA) will raise background levels and line_3: degrade science data quality. The ground system has the capability line_4: to predict entry and exit from the region in order to line_5: schedule science observations appropriately. The goals of this line_6: test are to measure the flux levels through the SAA with the HSP, line_7: to monitor fluctuations in the SAA on timescales of several line_8: days, and to identify any other regions of high particle fluxes line_9: in the HST orbit. line_10: These data will be used to verify the general line_11: structure of existing empirical models from which the boundaries line_12: used by the ground system will originate, to relate HSP line_13: count rates to the particle fluxes, and to scale fluctuations in line_14: the fluxes with respect to the HSP. ! ! end of abstract general_form_proposers: lname: LUPIE fname: O. mi: L. inst: STSCI country: USA ! lname: WHITE fname: R. mi: J. inst: STSCI country: USA ! lname: KINSEY fname: J. mi: S. inst: STSCI country: USA ! lname: STOCKMAN fname: H. mi: S. inst: STSCI country: USA ! lname: SLOVAK fname: M. inst: UNIV. OF WISCONSIN-MADISON country: USA ! lname: BELY fname: P. mi: Y. inst: STSCI country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: The goals of this line_2: test are to measure the flux levels through the SAA and record line_3: fluctuations in the field on timescales of several days using line_4: the HSP. These data will be used to verify the general line_5: structure of existing models, to scale fluctuations, and to line_6: relate HSP background levels to the particle fluxes. line_7: The contours describing the SAA boundaries are needed by the line_8: ground system, which has the capability to assign a unique line_9: contour for each SI. The strength of the particle fluxes line_10: through the SAA is a function of planar position and altitude. ! question: 2 section: 2 line_1: The HSP will be used to monitor the background levels over line_2: multiple successive orbits on a single day. The procedure will be line_3: repeated on a weekly basis over the course of two months. line_4: Mean HSP background levels will be related to models of the line_5: particle flux and the overall structure of the SAA verified. line_6: Fluctuations as a function of time about the mean values will line_7: be studied in order to scale the background levels measured line_8: by the other SIs during the OV/SV period. Therefore, we are line_9: requiring that the 8 dedicated sessions of HSP observations line_10: of the SAA be scheduled to coarsely overlap the scheduling line_11: of the dark calibrations of the other SIs during OV/SV. ! question: 3 section: 1 line_1: Test Procedure: line_2: 1) Select the HSP/PHOT configuration, 2IDT Mode (VIS and UV1), line_3: filters F355M-VIS, F240W-UV1, byte format, SAMPLE-TIME=10sec, line_4: target DARK. line_5: SPECIAL REQUIREMENTS: Sequence NON-INT, SEQUENTIAL [NO GAP] line_6: 2) First orbit: NUM EXP=9, EXP TIME=10 MIN; Observation must NOT line_7: impinge on SAA. line_8: 3) Orbits 2 through 9: NUM EXP=72, TIME=10MIN; Orbit #2 must line_9: begin prior to SAA entry and continue through the SAA so line_10: that remaining 6 orbits occur within the SAA. line_11: 4) Last orbit: NUM EXP=9, EXP TIME=10MIN; last orbit to occur after line_12: exit from the SAA to look for enduring detector effects. line_13: 5) REPEAT steps 1 through 4 EVERY 7 DAYS for 7 MORE TIMES. line_14: THE SEQUENCES MUST OVERLAP THE SCHEDULING OF ALL SI DARK line_15: MEASUREMENTS THROUGH THE SAA. ! question: 4 section: 0 line_1: Submitted as an Observatory Level Test. ! question: 5 section: 1 line_1: - The requirement for NON-INTERRUPTED observations spanning 9 orbits line_2: may be relaxed ONLY if absolutely necessary AND for very few and line_3: short periods during the orbit which lies OUTSIDE of the SAA. line_4: - The first orbit of the 9 to be scheduled outside SAA. line_5: - The second orbit must include the initial entry into the SAA. line_6: - The sequence of 10 orbits of dark data are to be repeated line_7: every 7 days for 7 more times. The 8 repetitions must be scheduled line_8: such that they overlap with the execution of the other line_9: SI radiation environment tests. Proposal IDs to be included when line_10: available. line_11: - HSP dark levels (non-particle environment) in the IDTs used line_12: in this OLT must have been verified and at the expected level line_13: of 0.1 cts/sec. ! question: 6 section: 1 line_1: The scientific goals of this test is to measure flux levels line_2: throughout the HST orbit: through the SAA in particular and in line_3: addition to identify any other regions of high particle flux. line_4: The strength of the particle fluxes through the SAA is a function of line_5: planar location and altitude. Therefore, continuous and un-interrupted line_6: observations are required to satisfy these goals. ! question: 7 section: 1 line_1: The data reduction and analysis will include the following: line_2: - to bin HSP data if necessary and associate count rate line_3: with latitude, longitude, and altitude (extracted from OMS). line_5: - to determine mean HSP count rates as a function of position over time line_6: and relate the HSP count rates to the mean fluxes predicted line_7: by the model (linear relation may be adequate). line_8: - to determine the amplitude and character of fluctuations. ! !end of general form text general_form_address: lname: STOCKMAN fname: H. mi: S. category: PI inst: ST SCI addr_1: 3700 SAN MARTIN DR city: BATIMORE state: MD zip: 21218 country: USA ! ! end of general_form_address records ! No fixed target records found ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: DARK config: HSP/VIS/UV1 opmode: STAR-SKY aperture: 1.0 sp_element: F355M num_exp: 9 time_per_exp: 10M priority: 1 param_1: SAMPLE-TIME=10.0, param_2: SKY-FILTER=F240W, param_3: DATA-FORMAT=BYTE, param_4: DELAY-TIME=0, param_5: SKY-APER=DARK, req_1: NON-INT / 1-3; req_2: SEQ 1-3 NO GAP; req_3: REPEAT 1-3 EVERY 7D req_4: +/- 2D FOR 7 MORE TIMES; req_5: CYCLE 0/ 1-3; comment_1: OBSERVATION MUST NOT IMPINGE comment_2: ON SAA BOUNDARY AT ANY TIME. ! linenum: 2.000 targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: ^ num_exp: 72 time_per_exp: ^ priority: 1 param_1: ^ param_2: ^ param_3: ^ param_4: ^ param_5: ^ comment_1: INTENT IS TO TAKE DARKS OVER THE comment_2: ENTIRE 7 ORBITS WHICH PASS comment_3: THROUGH THE SAA. THE FIRST comment_4: OF THE SEVEN ORBITS MUST BEGIN comment_5: PRIOR TO SAA PENETRATION AND comment_6: CONTINUE INTO THE SAA. ! linenum: 3.000 targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: ^ num_exp: 9 time_per_exp: ^ priority: 1 param_1: ^ comment_1: OBSERVATION MUST OCCUR OUTSIDE comment_2: SAA. ! ! end of exposure logsheet ! No scan data records found