! File: 1347C.PROP ! Database: PEPDB ! Date: 16-FEB-1994:14:53:58 coverpage: title_1: GHRS ACQUISITION AND TRACKING OF SATELLITES sci_cat: SOLAR SYSTEM proposal_for: SV/OLT pi_title: PROF. pi_fname: JOHN pi_lname: CALDWELL pi_inst: YORK UNIVERSITY pi_country: CANADA pi_phone: 416-736-2100 X7721 keywords_1: PLANETARY SATELLITES, ACQUISITION AND TRACKING hours_pri: 2.00 num_pri: 1 hrs: Y pi_position: PROFESSOR ! end of coverpage abstract: line_1: Mode I and Mode III acquisitions of planetary satellites may not work. This line_2: test verifies the GHRS Mode II onboard target acquisition capability. In line_3: addition, the ability to offset under gyro control and acquire guide stars "in line_4: place" is also verified. ! ! end of abstract general_form_proposers: lname: CALDWELL fname: JOHN inst: YORK UNIVERSITY country: CANADA ! lname: EBBETS fname: DENNIS inst: BALL AEROSPACE SYSTEMS DIVISION country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: The test is performed as follows: line_2: 1) Acquire planetary satellite line_3: 2) Take 5 maps to monitor PCS tracking. line_4: 3) Reacquire the satellite the repeat step 2. line_5: 4) After target occultation, the map to verify gyro tracking. line_6: 5) Reacquire the satellite line_7: 6) Offset to another "nearby" satellite under gyro control line_8: 7) Take map after slew to determine initial repointing line_9: 8) Acquire guide stars "in place" to test moving target capability which line_10: require different guide stars. ! question: 5 section: 1 line_1: This test is to be performed in the late SV time period, after line_2: completion of the line_3: HRS MODE II TARGET ACQUISITION (1352) and the OV MOVING TARGET OLT line_4: (2183) if done during OV (2183 has been scrubbed...). Select one of targets line_5: Europa, Titan or Deimos in given order of preference. line_7: Scheduling for lines 1-6 (Europa): line_8: Start (or end) test 6-10 hours after (or before) Earth, Europa, Jupiter line_9: syzygy so that fairly rapid portion of Europa's apparent orbital motion is line_10: sampled while also somewhat constraining possible influence of scattered light line_11: from Jupiter. (6 hours from syzygy, Europa is ~1.25 arcmin from Jupiter's limb) line_13: Scheduling for lines 14,15 (Titan, Deimos): line_14: Start (or end) test sufficiently after (or before) Earth, satellite, planet line_15: syzygy that test samples relatively rapid portion of satellite's apparent line_16: orbital motion while somewhat constraining influence of scattered light from line_17: the planet. line_19: The SEQ NO GAP requirements are included in this test to verify the line_20: gyro tracking of a moving target during the occultation period. ! question: 7 section: 1 line_1: The satellite's positions in the images will be compared to see how well the line_2: system tracks during the duration of an orbit. ! !end of general form text general_form_address: lname: EBBETS fname: DENNIS inst: BALL AEROSPACE SYSTEMS DIVISION addr_1: HRS PROJECT JWF-3 addr_2: P.O. BOX 1062 city: BOULDER state: CO zip: 80306 country: USA phone: (303) 939-5964 ! lname: CALDWELL fname: JOHN title: PROF. category: PI inst: YORK UNIVERSITY addr_1: PHYSICS DEPT addr_2: 4700 KEELE STREET city: NORTH YORK zip: M3J 1P3 country: ONTARIO, CANADA phone: 416-736-2100 X7721 ! ! end of general_form_address records ! No fixed target records found solar_system_targets: targnum: 1 name_1: EUROPA descr_1: SATELLITE EUROPA lev1_1: STD=JUPITER lev2_1: STD=EUROPA fluxnum_1: 1 fluxval_1: V=5.3, B-V=0.87 ! targnum: 2 name_1: DEIMOS descr_1: SATELLITE DEIMOS lev1_1: STD=MARS lev2_1: STD=DEIMOS fluxnum_1: 1 fluxval_1: V=12.4, B-V=0.65 ! targnum: 3 name_1: TITAN descr_1: SATELLITE TITAN lev1_1: STD=SATURN lev2_1: STD=TITAN comment_1: EUROPA IS THE PREFERRED TARGET FOR comment_2: THIS TEST, FOLLOWED BY DEIMOS AND comment_3: TITAN. fluxnum_1: 1 fluxval_1: V=8.3, B-V=1.28 ! targnum: 4 name_1: IO descr_1: SATELLITE IO lev1_1: STD=JUPITER lev2_1: STD=IO ! targnum: 5 name_1: RHEA descr_1: SATELLITE RHEA lev1_1: STD=SATURN lev2_1: STD=RHEA ! targnum: 6 name_1: PHOBOS descr_1: SATELLITE PHOBOS lev1_1: STD=MARS lev2_1: STD=PHOBOS ! ! end of solar system targets ! No generic target records found exposure_logsheet: linenum: 1.000 targname: EUROPA config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 25S priority: 1 param_1: FAINT=45, param_2: SEARCH-SIZE=5, req_1: ONBOARD ACQ FOR 2; req_2: SELECT 1 OF 1-7.1 OR 14-14.2 OR 15-15.2; req_3: COND IF EUROPA VISIBLE; req_4: SEQ 1-7.1 NO GAP; req_5: SEQ 1-4 NON-INT; req_6: CYCLE 0/1-15.2; comment_1: STEP-TIME=1, ! linenum: 2.000 targname: ^ config: ^ opmode: IMAGE aperture: ^ sp_element: MIRROR-N2 num_exp: 5 time_per_exp: 1M priority: ^ req_1: COND IF EUROPA VISIBLE; comment_1: TAKE REPEATED MAPS OF LSA TO MONITOR comment_2: TRACKING OF SATELLITE BY PCS. comment_3: DO NOT RECENTER TARGET IN LSA comment_4: FOLLOWING EACH MAP. STEP-TIME=0.2 ! linenum: 3.000 targname: ^ config: ^ opmode: ACQ aperture: ^ sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 25S priority: ^ param_1: FAINT=45, param_2: SEARCH-SIZE=5, req_1: ONBOARD ACQ FOR 4; req_2: COND IF EUROPA VISIBLE; comment_1: SPIRAL SEARCH OF ORDER FIVE. PERFORM comment_2: NULL BALANCE WITHIN CURRENT FOV. comment_3: CENTER TARGET IN LSA. VERIFIES comment_4: REPEATABILITY OF NULL BALANCE ON comment_5: EXTENDED OBJECT, SEARCH PHASE1, comment_6: LOCATE PHASE1. STEP-TIME 1.0S ! linenum: 4.000 targname: EUROPA config: HRS opmode: IMAGE aperture: 2.0 sp_element: MIRROR-N2 num_exp: 5 time_per_exp: 96.8S priority: 1 req_1: COND IF EUROPA VISIBLE; comment_1: TAKE REPEATED MAPS OF LSA TO MONITOR comment_2: TRACKING BY PCS. comment_3: DO NOT RECENTER TARGET IN LSA comment_4: FOLLOWING EACH MAP. STEP-TIME=0.2 ! linenum: 5.000 targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: 1 time_per_exp: 96.8S priority: ^ param_1: ^ req_1: COND IF EUROPA VISIBLE; req_2: SEQ 5-7.1 NON-INT; comment_1: TAKE MAP OF LSA TO VERIFY GYRO comment_2: TRACKING DURING OCCULTATION AND comment_3: ACQUISITION IN LSA FOLLOWING GS comment_4: REACQ. AFTER 4 BY 30M +/- 10M. comment_5: DO NOT RECENTER IN LSA FOLLOWING MAP. ! linenum: 6.000 targname: ^ config: ^ opmode: ACQ aperture: ^ sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 25S priority: 1 param_2: SEARCH-SIZE=5, req_1: COND IF EUROPA VISIBLE; comment_1: USE SPIRAL SEARCH OF UP TO 10X10 comment_2: ARCSEC FIELD. comment_3: CENTER IN LSA TO VERIFY EXTENDED comment_4: TARGET NULL BALANCE REPEATABILITY, comment_5: SEARCH PHASE1, LOCATE PHASE 1. comment_6: STEP-TIME = 1.0S ! linenum: 7.000 targname: IO config: HRS opmode: IMAGE aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 96.8S priority: 1 req_1: GUID TOL 0.01"; req_2: COND IF EUROPA VISIBLE; comment_1: OFFSET TO IO UNDER GYRO CONTROL. comment_2: STEP-TIME=0.2. ! linenum: 7.100 targname: IO config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 477S priority: 1 param_1: SEARCH-SIZE=3, MAP=ALL-POINTS, req_1: GUID TOL 0.02"; req_2: COND IF EUROPA VISIBLE; comment_1: ACQUIRE GUIDE STARS "IN PLACE". THIS comment_2: LINE IS INTENDED TO TEST THE F0 comment_3: EXTENDED TRACKING WITH DIFFERENT comment_4: GUIDE STARS CAPABILITY. comment_6: STEP-TIME=0.2. ! linenum: 8.000 sequence_1: DEFINE sequence_2: TRACK targname: # config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 25S priority: # param_1: MAP=END-POINT, param_2: SEARCH-SIZE=5, req_1: ONBOARD ACQ FOR 9; req_3: SEQ 8-11 NON-INT; req_4: SEQ 8-12 NO GAP; comment_1: USE SPIRAL SEARCH OF UP TO 10X10 comment_2: ARCSEC FIELD. comment_3: CENTER TARGET IN LSA, SEARCH PHASE 1, comment_4: LOCATE PHASE 1. STEP-TIME=1.0 ! linenum: 9.000 sequence_1: ^ targname: ^ config: ^ opmode: IMAGE aperture: ^ sp_element: ^ num_exp: 5 time_per_exp: 484S priority: ^ comment_1: TAKE REPEATED MAPS OF LSA TO MONITOR comment_2: TRACKING BY PCS. comment_3: DO NOT RECENTER TARGET IN LSA comment_4: FOLLOWING EACH MAP. STEP-TIME=1.0 ! linenum: 10.000 sequence_1: DEFINE sequence_2: TRACK targname: # config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 25S priority: # param_1: MAP=END-POINT, param_2: SEARCH-SIZE=5, req_1: ONBOARD ACQ FOR 11; comment_1: USE SPIRAL SEARCH OF ORDER FIVE. comment_3: PERFORM NULL BALANCE WITHIN CURRENT comment_4: FOV. CENTER TARGET IN LSA, SEARCH comment_5: PHASE 1, LOCATE PHASE 1. comment_6: STEP-TIME = 1.0S ! linenum: 11.000 sequence_1: ^ targname: ^ config: ^ opmode: IMAGE aperture: ^ sp_element: ^ num_exp: 5 time_per_exp: 96.8S priority: ^ comment_1: TAKE MAP OF LSA TO MONITOR TRACKING comment_2: BY PCS AND VERIFY REPEATABILITY OF comment_3: PEAKUP ON EXTENDED TARGET. comment_4: STEP-TIME=1.0 ! linenum: 12.000 sequence_1: ^ targname: ^ config: ^ opmode: ACQ aperture: ^ sp_element: ^ num_exp: 1 time_per_exp: 25S priority: ^ param_2: SEARCH-SIZE=5, comment_1: AFTER OCCULTATION. USE SPIRAL SEARCH comment_2: OF UP TO 10X10 ARCSEC FIELD. CENTER comment_3: TARGET IN LSA. CHECKS QUALITY OF GYRO comment_4: TRACKING DURING OCCUL. AND NULL comment_5: BALANCE ON EXTENDED TARGET. comment_6: STEP-TIME=1.0 AFTER 11 BY 30M +/- 10M ! linenum: 14.000 sequence_1: USE sequence_2: TRACK targname: TITAN priority: 1 req_1: COND IF TITAN VISIBLE; comment_1: SECOND PRIORITY TARGET IF EUROPA IS comment_2: NOT AVAILABLE. ! linenum: 14.100 targname: RHEA config: HRS opmode: IMAGE aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 96.8S priority: 1 req_1: SEQ 14.0 - 14.2 NO GAP; req_2: GUID TOL 0.01"; req_3: COND IF TITAN VISIBLE; comment_1: OFFSET TO RHEA UNDER GYRO CONTROL. comment_2: STEP-TIME = 0.2. ! linenum: 14.200 targname: RHEA config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 477S priority: 1 param_1: SEARCH-SIZE=3, MAP=ALL-POINTS, req_1: GUID TOL 0.02"; req_2: COND IF TITAN VISIBLE; comment_1: ACQUIRE GUIDE STARS "IN PLACE". comment_2: INTENDED TO TEST THE F0 CAPABILITY OF comment_3: EXTENDED TRACKING WITH DIFFERENT comment_4: GUIDE STARS. ! linenum: 15.000 sequence_1: USE TRACK targname: DEIMOS priority: 1 req_1: COND IF DEIMOS VISIBLE; comment_1: THIRD PRIORITY TARGET IF EUROPA AND comment_2: TITAN ARE NOT AVAILABLE. ! linenum: 15.100 targname: PHOBOS config: HRS opmode: IMAGE aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 96.8S priority: 1 req_1: SEQ 15 - 15.2 NO GAP; req_2: GUID TOL 0.01"; req_3: COND IF DEIMOS VISIBLE; comment_1: OFFSET TO PHOBOS UNDER GYRO CONTROL. comment_2: STEP-TIME=0.2 ! linenum: 15.200 targname: PHOBOS config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 477S priority: 1 param_1: SEARCH-SIZE=3, MAP=ALL-POINTS, req_1: GUID TOL 0.02"; req_2: COND IF DEIMOS VISIBLE; comment_1: ACQUIRE GUIDE STARS "IN PLACE." comment_2: INTENDED TO TEST THE F0 CAPABILITY OF comment_3: EXTENDED TRACKING WITH comment_4: DIFFERENT GUIDE STARS. comment_6: STEP-TIME=0.2 ! ! end of exposure logsheet ! No scan data records found