! File: 2165C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:02:15:35 coverpage: title_1: GHRS MOVING TARGET ACQUISITION AND TRACKING proposal_for: SV/HRS pi_fname: DENNIS pi_mi: C pi_lname: EBBETS pi_inst: BALL AEROSPACE SYSTEMS GROUP pi_country: USA pi_phone: 303-939-5964 keywords_1: GHRS,SCIENCE VERIFICATION,TARGET ACQUISITION keywords_2: CALIBRATION hours_pri: 1.80 num_pri: 1 wf_pc: Y hrs: Y time_crit: Y ! end of coverpage abstract: line_1: This test was rewritten April 28, 1989 for the SV Scrub line_2: Plan, after consultation with Hal Weaver. line_4: The goal of this test is to develop and verify the ability to acquire and line_5: track rapidly moving solar system objects such as comets and line_6: asteriods. There are two procedures identified, a WFC Int line_7: Acq, and an FOS Acq/Firmware. We also make GHRS Images in both line_8: undispersed UV light with N2, and the light of CS emission at line_9: 2576A. This may be useful for Dispersed Light Target Acq. line_10: if sufficiently bright and concentrated near the nucleus. ! ! end of abstract general_form_proposers: lname: TRAFTON fname: L. mi: M. inst: UNIV OF TEXAS country: USA ! lname: BRANDT fname: J. mi: C. inst: LASP/UNIV OF COLORADO country: USA ! lname: EBBETS fname: DENNIS mi: C. inst: BALL AEROSPACE SYSTEMS country: USA ! lname: WEAVER fname: HAL inst: SPACE TELESCOPE SCIENCE INSTITUTE country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: Comets will be important scientific targets for the GHRS during line_2: the GTO and GO phases. Four problems will complicate observations line_3: when they are nearest the Earth. (1) The ephemeris may not be line_4: known precisely enough when proposals are written to predict the line_5: location at observation time to better than a few arc seconds. line_6: (2) The rate of motion across the sky may make it difficult or line_7: impossible to perform a WFC assisted acquisition using common line_8: quide stars. (3) It may be difficult to track in FGS Fine Track line_9: Lock for the required exposure time. (4) The extended appearance line_10: will complicate on board Mode II target acquisition using current line_11: (9/87) GHRS flight software. The observations proposed here line_12: describe a plausible approach to overcome the first three issues. ! question: 3 section: 1 line_1: 1. Interactive Acquisition with WFC (and/or GHRS) line_2: a. WFC V image (F569W) to identify target line_3: b. WFC UV image (F284W) line_4: c. offset to GHRS 2.0 aperture line_5: c. GHRS map and measure flux with Mirror N2 line_6: guide on gyros along approximate path line_7: d. GHRS Image Mode observation at 2576A light of CS line_8: e. GHRS Accum Mode spectrum at 2576A. line_9: f. return to WFC and repeat image to judge guiding accuracy line_11: 2. FOS assisted on-board acquisition line_12: a. Acq/Firmware acquisition line_13: b. offset to WFC t a particular pixel line_14: c. WFC image to judge accuracy of FOS acquisition ! question: 5 section: 1 line_1: line_3: Test should be performed when the target is moving with a porper line_4: motion in the range 0.01 to 0.1 "/sec. line_6: Real time analysis is needed to process the WFC images as Interactive line_7: Acquisitions. line_10: The ability to track and guide accurately for approximately 45 line_11: minutes is the main purpose of the test. line_13: Gyro control will be used while tracking comet. line_15: SV Minimum Plan: All line_16: SV Delta Plan: None line_17: Guiding tolerance 0.20 arc seconds line_19: SV PREREQUISITES: line_20: FOS Mode II Target Acquisition - 2195 line_21: GHRS Mode II Target Acquisition - 1352 line_22: GHRS WF/PC Assisted Target Acquisition - 1400 line_23: OV Moving Target OLT - 2183 ! question: 7 section: 1 line_1: Cross-calibrate WFC and GHRS acquisition mirror count rates. line_3: Use location of target in field maps to estimate accuracy of line_4: tracking on gyros for ten minutes at a time. ! question: 10 section: 1 line_1: Data analysis facilities line_2: Test personnel line_3: Travel and publication support ! !end of general form text general_form_address: lname: EBBETS fname: D. mi: C. category: PI inst: BALL AEROSPACE addr_1: PO BOX 1062 addr_2: FT-3 city: BOULDER state: CO zip: 80306 country: USA phone: (303)939-5964 ! lname: WEAVER fname: HAROLD mi: A. inst: SPACE TELESCOPE SCIENCE INSTITUTE addr_1: 3700 SAN MARTIN DRIVE city: BALTIMORE state: MD zip: 21218 country: USA phone: 301-338-4765 ! ! end of general_form_address records ! No fixed target records found solar_system_targets: targnum: 1 name_1: WILD descr_1: COMET WILD 2 lev1_1: STD = WILD 2 comment_1: USER AFTER LATE NOVEMBER,1990 comment_2: THROUGH EARLY 1991. ! targnum: 2 name_1: SWIFT descr_1: COMET SWIFT-GEHREL lev1_1: STD = SWIFT-GEHREL comment_1: USE FROM MID-OCT 1990 TO LATE DEC comment_2: 1990. ! ! end of solar system targets ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEF sequence_2: COMET1 targname: # config: WFC opmode: IMAGE aperture: W1 sp_element: F569W num_exp: 1 time_per_exp: 0.2S s_to_n: 100 fluxnum_1: 1 priority: 1 req_1: INT ACQ FOR 2-5; req_2: SEQ 1-6; req_3: GUID TOL 0.20"/1-6; req_4: CYCLE 0 / 1-31; comment_1: BLIND POINT TO COMET comment_2: WHILE TRACKING COMET comment_3: UNDER GYRO CONTROL. ! linenum: 2.000 sequence_1: ^ sequence_2: ^ targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: F284W num_exp: 1 time_per_exp: 2M s_to_n: 80 fluxnum_1: 1 priority: 1 ! linenum: 3.000 sequence_1: ^ sequence_2: ^ targname: ^ config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 265S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: MAP=END-POINT, param_3: SEARCH-SIZE=1, param_4: LOCATE=NO, param_5: FAINT=10, req_1: ONBOARD ACQ FOR 4,5; comment_1: STEP-TIME=1 ! linenum: 4.000 sequence_1: ^ sequence_2: ^ targname: ^ config: ^ opmode: IMAGE aperture: ^ sp_element: G270M num_exp: 1 time_per_exp: 968S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: CARPOS=9792, param_2: X=2035, param_3: Y=2781, comment_1: STEP-TIME=2 ! linenum: 5.000 sequence_1: ^ sequence_2: ^ targname: ^ config: ^ opmode: ACCUM aperture: ^ sp_element: G270M wavelength: 2576 num_exp: 1 time_per_exp: 4M s_to_n: 20 fluxnum_1: ^ priority: ^ param_1: STEP-PATT=3, param_2: COMB=FOUR, param_3: DOPPLER=DEF, param_4: STEP-TIME=0.2, ! linenum: 6.000 sequence_1: ^ sequence_2: ^ targname: ^ config: WFC opmode: IMAGE aperture: W1 sp_element: F569W num_exp: 1 time_per_exp: 0.2S s_to_n: 100 fluxnum_1: 1 priority: 1 comment_1: BLIND POINT TO COMET comment_2: WHILE TRACKING COMET UNDER comment_3: UNDER GYRO CONTROL. ! linenum: 10.000 sequence_1: DEF sequence_2: COMET2 targname: # config: FOS/RD opmode: ACQ/FIRMWARE aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 1M s_to_n: 10 fluxnum_1: 1 priority: 1 req_1: ONBOARD ACQ FOR 11,12; req_2: SEQ 10-12; comment_1: EXPOSURE TIMES UNCERTAIN FOR FOS OBS comment_2: OFFSET TO WFC AFTER FOS ACQUISITION ! linenum: 11.000 sequence_1: ^ sequence_2: ^ targname: ^ config: WFC opmode: IMAGE aperture: W1 sp_element: F569W num_exp: 1 time_per_exp: 0.2S s_to_n: 100 fluxnum_1: 1 priority: 1 ! linenum: 12.000 sequence_1: ^ sequence_2: ^ targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: F284W num_exp: ^ time_per_exp: 2.0M s_to_n: 80 fluxnum_1: ^ priority: ^ ! linenum: 20.000 sequence_1: USE COMET1 targname: WILD req_1: SELECT 1 OF 20-21 OR 30-31; req_2: COND IF TARGETS ARE AVAILABLE; ! linenum: 21.000 sequence_1: USE COMET2 targname: WILD req_1: COND IF TARGETS ARE AVAILABLE; ! linenum: 30.000 sequence_1: USE COMET1 targname: SWIFT req_1: COND IF TARGETS ARE AVAILABLE; ! linenum: 31.000 sequence_1: USE COMET2 targname: SWIFT req_1: COND IF TARGETS ARE AVAILABLE; ! ! end of exposure logsheet ! No scan data records found