! $Id: 4399,v 4.1 1994/07/27 14:26:39 pepsa Exp $ coverpage: title_1: SMOV POST-SERVICING 5 POINTS OF LIGHT sci_cat: OTA proposal_for: SMC/OTA pi_fname: JAIME pi_lname: ESPER pi_inst: MOC BFEC pi_country: USA pi_phone: 301-286-6106 keywords_1: S-CURVE TEST hours_pri: 2.50 num_pri: 1 ! end of coverpage abstract: line_1: OTA/FGS CHARACTERIZATION line_2: Servicing Mission activities may expose the HST line_3: to stresses that could change the OTA/FGS optical line_4: alignments and FGS performance characteristics. line_5: The current proposal attempts to characterize such line_6: effects by measuring the FGS transfer function at line_7: various positions within the three FGSs, both before line_8: and after the Servicing Mission. This test includes line_9: the transfer scans at 5 positions within each FGS along line_10: the arc through the center of the FOV that are to be run after the servicing line_11: mission. ! ! end of abstract general_form_proposers: lname: ESPER fname: JAIME inst: MOC BFEC country: USA ! lname: FTACLAS fname: CHRIST inst: HUGHES DOS country: USA ! lname: BRADY fname: WILLIAM mi: L. inst: HUGHES DOS country: USA ! lname: BASEDOW fname: ROBERT inst: HUGHES DOS country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: OTA/FGS CHARACTERIZATION line_2: Servicing Mission activities may expose the HST line_3: to stresses that could change the OTA/FGS optical line_4: alignments and FGS performance characteristics. The line_5: FGS transfer function calibration will become a most line_6: critical, end-to-end verification of the OTA/FGS line_7: optical system. Slight changes in S-Curve morphology line_8: will be indicative of changes in the optical train, and line_9: hence will provide a quick way of ensuring the line_10: OTA/FGS performance. line_13: This test includes transfer scans at 5 positions within each FGS. line_15: Data from this test will also provide important insight line_16: into the question concerning the FGSs' ability to line_17: acquire and track stars for both spacecraft guidance line_18: and astrometry science. ! question: 2 section: 2 line_1: This test will determine the line_2: characteristics of the s-curves as a function line_3: of the location in the focal plane. It will also line_4: provide data to verify FGS PMT well-being. ! question: 3 section: 1 line_1: line_2: A) Acquire brightest available Guide Stars in guiding FGSs line_3: using Fine Lock (guide star magnitudes less than 13). line_4: 1) Perform 5 transfer scans in FGS3 with the clear line_5: aperture at position 1. line_7: 2) Repeat 1 for FOUR other positions, line_8: for a total of 5 positions and line_9: 25 scans. line_10: B) Repeat A with FGS2 as astrometer. line_11: C) Repeat A with FGS1 as astrometer. ! question: 5 section: 1 line_1: PREREQUISITES: line_2: 1) Fine Lock guiding re-enabled via FGS Pattern Match data analysis. line_4: SPECIAL SCHEDULING NOTES: (1) The bright target star is required to provide line_5: high signal to noise in the transfer scan data. The brightest available line_6: guide stars are desired to provide minimum jitter when data are analyzed. line_7: (2) Steps can be taken by SPSS to improve guide star line_8: availability - i.e., non-centerlining, spoiler radius. line_9: (3) 32 Kbit data are required. line_10: (4) This sequence of observations are to be performed after servicing mission line_11: but before any secondary mirror adjustments are performed. These observations line_12: will also have been performed (via another proposal) within the month prior to line_13: the servicing mission. ! question: 7 section: 1 line_1: Data reduction will be performed in the PASS, and line_2: data analysis will be carried out with the use line_3: of algorithms and software developed by HUGHES DOS. ! question: 10 section: 1 line_1: Computer facilities at HUGHES DOS home facility. ! !end of general form text general_form_address: lname: ESPER fname: JAIME category: PI inst: MOC BFEC ! lname: FTACLAS fname: CHRIST category: CON inst: HUGHES DOS country: USA phone: 203-797-6448 ! lname: BRADY fname: WILLIAM mi: L. category: CON inst: HUGHES DOS country: USA phone: 203-797-5770 ! lname: BASEDOW fname: ROBERT category: CON country: USA phone: 203-797-5838 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: UPGREN69 descr_1: J,701 pos_1: RA=9.46625D +/- .0004D, pos_2: DEC=84.9632778D +/- .002D equinox: 1950 comment_1: THIS STAR IS FOR TRANSFER SCANS fluxnum_1: 1 fluxval_1: V=9.58 +/- 0.05 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: TF1 targname: UPGREN69 config: FGS opmode: TRANS aperture: # sp_element: F583W num_exp: 1 time_per_exp: 300S fluxnum_1: 1 priority: 1 param_1: DATA-RATE = 32, param_2: STEP-SIZE=1.0, param_3: SCANS=5, ! linenum: 131.000 sequence_1: USE TF1 aperture: 3 req_1: SEQ 131-135 NO GAP; req_2: POS TARG -446.8,-153.0; req_3: CYCLE 4/131-315; ! linenum: 132.000 sequence_1: USE TF1 aperture: 3 req_1: POS TARG -279.0,-55.50; ! linenum: 133.000 sequence_1: USE TF1 aperture: 3 req_1: POS TARG 0.0,0.0 ; ! linenum: 134.000 sequence_1: USE TF1 aperture: 3 req_1: POS TARG 279.0,-55.50; ! linenum: 135.000 sequence_1: USE TF1 aperture: 3 req_1: POS TARG 446.8,-153.0; ! linenum: 221.000 sequence_1: USE TF1 aperture: 2 req_1: SEQ 221-225 NO GAP; req_2: POS TARG -446.8,-153.0 ; ! linenum: 222.000 sequence_1: USE TF1 aperture: 2 req_1: POS TARG -279.0,-55.50; ! linenum: 223.000 sequence_1: USE TF1 aperture: 2 req_1: POS TARG 0.0,0.0 ; ! linenum: 224.000 sequence_1: USE TF1 aperture: 2 req_1: POS TARG 279.0,-55.50; ! linenum: 225.000 sequence_1: USE TF1 aperture: 2 req_1: POS TARG 446.8,-153.0 ; ! linenum: 311.000 sequence_1: USE TF1 aperture: 1 req_1: SEQ 311-315 NO GAP; req_2: POS TARG -446.8,-153.0 ; ! linenum: 312.000 sequence_1: USE TF1 aperture: 1 req_1: POS TARG -279.0,-55.50; ! linenum: 313.000 sequence_1: USE TF1 aperture: 1 req_1: POS TARG 0.0,0.0 ; ! linenum: 314.000 sequence_1: USE TF1 aperture: 1 req_1: POS TARG 279.0,-55.50; ! linenum: 315.000 sequence_1: USE TF1 aperture: 1 req_1: POS TARG 446.8,-153.0; ! ! end of exposure logsheet ! No scan data records found