! File: 3089C.PROP ! Database: PEPDB ! Date: 18-FEB-1994:16:21:49 coverpage: title_1: OTA-FGS CHARACTERIZATION sci_cat: STELLAR ASTROPHYSICS proposal_for: OV longterm: 3 pi_fname: WILLIAM pi_mi: H. pi_lname: JEFFERYS pi_inst: TEXAS, UNIVERSITY OF pi_country: USA pi_phone: 512-471-4461 keywords_1: S-CURVE TEST hours_pri: 15.00 num_pri: 15 time_crit: X pi_position: PROF OF ASTRONOMY ! end of coverpage abstract: line_1: OTA-FGS CHARACTERIZATION line_2: The Astrometry Science Team and HDOS need to assess line_3: the FGS transfer function at various positions within and line_4: between the three FGSs. This test includes transfer scans line_5: at 9 positions within each FGS: 3 along the vertical line line_6: through the center, one at each of the corners, and one at line_7: the center of each half pickle. Radial dependence will be line_8: determined by the center scans, FGS to FGS consistancy vs line_9: OTA aberration will be determined by comparing the line_10: neighboring measurements between FGSs. ! ! end of abstract general_form_proposers: lname: JEFFERYS fname: WILLIAM mi: H. inst: TEXAS, UNIVERSITY OF country: USA ! lname: BENEDICT fname: GEORGE mi: F. inst: TEXAS, UNIVERSITY OF country: USA ! lname: DUNCOMBE fname: RAYNOR mi: L. inst: TEXAS, UNIVERSITY OF country: USA ! lname: FRANZ fname: OTTO mi: G. inst: LOWELL OBSERVATORY country: USA ! lname: FREDRICK fname: LAURENCE mi: W. inst: VIRGINIA, UNIVERSITY OF country: USA ! lname: HEMENWAY fname: PAUL mi: D. inst: TEXAS, UNIVERSITY OF country: USA ! lname: SHELUS fname: PETER mi: J. inst: TEXAS, UNIVERSITY OF country: USA ! lname: VAN ALTENA fname: WILLIAM mi: F. inst: YALE UNIVERSITY country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: OTA-FGS CHARACTERIZATION line_2: The Astrometry Science Team and HDOS need to assess line_3: the FGS transfer function at various positions within and line_4: between the three FGSs. For a given secondary mirror line_5: position, this test includes transfer scans at 9 positions line_6: within each FGS: five interior points and points at each line_7: of the four corners. Radial dependence will be determined line_8: by the center scans. FGS to FGS consistancy vs OTA line_9: aberration affects will be determined by comparing the line_10: neighboring measurements between FGSs. Data from this test line_11: will provide important insight to two very important line_12: questions concerning the FGSs' ability to acquire and track line_13: stars for both spacecraft guidance and astrometry science. line_14: To this date, bright star S-curves have never been obtained line_15: at any point in the FGS total field-of-view significantly line_16: far from pickle center, yet guide star acquisitions are line_17: routinely attempted throughout the pickle, using k-factors line_18: determined by the measurements performed near pickle center. line_19: Furthermore, s-cuvres of the same star have been seen to line_20: differ widely from FGS to FGS, with FGS3 out-performing ! question: 2 section: 2 line_1: FGS1 and FGS2. This test will determine if the line_2: characteristics of the s-curves depend upon location in the line_3: focal plane, and by comparing the scans from near corners line_4: of adjacent FGSs, if hereto seen differences are due to line_5: intrinsic FGS misalignments or OTA distortions. If infact line_6: it is learned that inter-FGS s-curve differences are due to line_7: the OTA, then it will bee clear that the 3 FGSs can and shuld line_8: be used to help charactize the OTA for continuee corrections line_9: to the alignment of the secondary mirror and perhaps provide line_10: important data for the specification of the second generation line_11: instruments. ! question: 3 section: 1 line_1: line_2: A) Acquire brightest available Guide Stars in FGS 1 and 2 line_3: in fine lock if magnitude < 13th, otherwise coarse track. line_4: 1) Perform 5 transfer scans in FGS3 with the clear line_5: aperture in the extreme lower corner of the pickle. line_6: 2) Repeat 1 with the 2/3 aperture. line_7: 3) Repeat 1 and 2 for the corners and three central line_8: y-axis positions, for a total of 9 positions and line_9: 18 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: The bright target star is required to provide high signal to line_2: noise in the transfer scan data. The brightest available line_3: guide stars are desired to provide highest fidelity fine lock line_4: guidance for removal of vehicle jitter when data is analyzed. line_5: 32 Kbit data are required. ! question: 7 section: 1 line_1: Data reduction and analysis will be carried out with the use line_2: of algorithms and software developed by STAT. Such reductions line_3: and analyses may require the use of data processing line_4: facilities both at STScI and at the home institutions of line_5: STAT members. ! question: 10 section: 1 line_1: Computer facilities at STAT members' institutions. ! !end of general form text general_form_address: lname: JEFFERYS fname: WILLIAM mi: H. category: PI inst: UNIVERSITY OF TEXAS addr_1: ASTRONOMY DEPARTMENT city: AUSTIN state: TX zip: 78712 country: USA phone: 512-471-3000 telex: TEXASTRO ! lname: BENEDICT fname: GEORGE mi: F. category: CON inst: UNIVERSITY OF TEXAS addr_1: ASTRONOMY DEPARTMENT city: AUSTIN state: TX zip: 78712 country: USA phone: 512-471-3448 telex: TEXASTRO ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: FGS.CHAR1 descr_1: FGS STAR descr_2: UPGREN69 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: FGS.CHAR1 config: FGS opmode: TRANS aperture: # sp_element: # 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, param_4: ACQ-MODE=SEARCH, param_5: ACQ-DIST=7 req_1: NON-INT; comment_1: FINE LOCK GUIDING IF comment_2: GS BRIGHTER THAN 13.0 ! linenum: 11.000 sequence_1: USE TF1 aperture: 3 sp_element: F583W req_1: SEQ 11-12 NO GAP; req_2: POS TARG -446.8,-153.0; req_3: SAME POS FOR 12 AS 11 comment_1: ACQUIRE GS AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 12.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 21.000 sequence_1: USE TF1 aperture: ^ sp_element: F583W req_1: SEQ 21-22 NO GAP; req_2: POS TARG -483.6,-105.6; req_3: SAME POS FOR 22 AS 21 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 22.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 25.000 sequence_1: USE TF1 aperture: 3 sp_element: F583W req_1: SEQ 25-26 NO GAP; req_2: POS TARG -279.0,-55.49; req_3: SAME POS FOR 26 AS 25 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 26.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 31.000 sequence_1: USE TF1 aperture: 3 sp_element: F583W req_1: SEQ 31-32 NO GAP; req_2: POS TARG 0.0,-60.0 ; req_3: SAME POS FOR 32 AS 31 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 32.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 41.000 sequence_1: USE TF1 aperture: 3 sp_element: F583W req_1: SEQ 41-42 NO GAP; req_2: POS TARG 0.0,0.0 ; req_3: SAME POS FOR 42 AS 41 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 42.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 51.000 sequence_1: USE TF1 aperture: ^ sp_element: F583W req_1: SEQ 51-52 NO GAP; req_2: POS TARG 0.0,60.0; req_3: SAME POS FOR 52 AS 51 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 52.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 55.000 sequence_1: USE TF1 aperture: 3 sp_element: F583W req_1: SEQ 55-56 NO GAP; req_2: POS TARG 279.0,-55.50 ; req_3: SAME POS FOR 56 AS 55 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 56.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 61.000 sequence_1: USE TF1 aperture: ^ sp_element: F583W req_1: SEQ 61-62 NO GAP; req_2: POS TARG 446.8,-153.0; req_3: SAME POS FOR 62 AS 61 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 62.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 71.000 sequence_1: USE TF1 aperture: ^ sp_element: F583W req_1: SEQ 71-72 NO GAP; req_2: POS TARG 483.6,-105.6; req_3: SAME POS FOR 72 AS 71 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 72.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 111.000 sequence_1: USE TF1 aperture: 2 sp_element: F583W req_1: SEQ 111-112 NO GAP; req_2: POS TARG -446.8,-153.0 ; req_3: SAME POS FOR 112 AS 111 comment_1: ACQUIRE GS AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 112.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 121.000 sequence_1: USE TF1 aperture: ^ sp_element: F583W req_1: SEQ 121-122 NO GAP; req_2: POS TARG -483.6,-105.6; req_3: SAME POS FOR 122 AS 121 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 122.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 125.000 sequence_1: USE TF1 aperture: 2 sp_element: F583W req_1: SEQ 125-126 NO GAP; req_2: POS TARG -279.0,-55.49 ; req_3: SAME POS FOR 126 AS 125 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 126.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 131.000 sequence_1: USE TF1 aperture: ^ sp_element: F583W req_1: SEQ 131-132 NO GAP; req_2: POS TARG 0.0,-60.0 ; req_3: SAME POS FOR 132 AS 131 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 132.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 141.000 sequence_1: USE TF1 aperture: ^ sp_element: F583W req_1: SEQ 141-142 NO GAP; req_2: POS TARG 0.0,0.0 ; req_3: SAME POS FOR 142 AS 141 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 142.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 151.000 sequence_1: USE TF1 aperture: 2 sp_element: F583W req_1: SEQ 151-152 NO GAP; req_2: POS TARG 0.0,60.0; req_3: SAME POS FOR 152 AS 151 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 152.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 155.000 sequence_1: USE TF1 aperture: 2 sp_element: F583W req_1: SEQ 155-156 NO GAP; req_2: POS TARG 279.0,-55.5 ; req_3: SAME POS FOR 156 AS 155 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 156.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 161.000 sequence_1: USE TF1 aperture: ^ sp_element: F583W req_1: SEQ 161-162 NO GAP; req_2: POS TARG 446.8,-153.0 ; req_3: SAME POS FOR 162 AS 161 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 162.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 171.000 sequence_1: USE TF1 aperture: ^ sp_element: F583W req_1: SEQ 171-172 NO GAP; req_2: POS TARG 483.6,-105.6 ; req_3: SAME POS FOR 172 AS 171 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 172.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 211.000 sequence_1: USE TF1 aperture: 1 sp_element: F583W req_1: SEQ 211-212 NO GAP; req_2: POS TARG -446.8,-153.0 ; req_3: SAME POS FOR 212 AS 211 comment_1: ACQUIRE GS AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 212.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 221.000 sequence_1: USE TF1 aperture: 1 sp_element: F583W req_1: SEQ 221-222 NO GAP; req_2: POS TARG -483.6,-105.6; req_3: SAME POS FOR 222 AS 221 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 222.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 225.000 sequence_1: USE TF1 aperture: 1 sp_element: F583W req_1: SEQ 225-226 NO GAP; req_2: POS TARG -279.0,-55.5 ; req_3: SAME POS FOR 226 AS 225 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 226.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 231.000 sequence_1: USE TF1 aperture: 1 sp_element: F583W req_1: SEQ 231-232 NO GAP; req_2: POS TARG 0.0,-60.0 ; req_3: SAME POS FOR 232 AS 231 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 232.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 241.000 sequence_1: USE TF1 aperture: ^ sp_element: F583W req_1: SEQ 241-242 NO GAP; req_2: POS TARG 0.0,0.0 ; req_3: SAME POS FOR 242 AS 241 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 242.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 251.000 sequence_1: USE TF1 aperture: ^ sp_element: F583W req_1: SEQ 251-252 NO GAP; req_2: POS TARG 0.0,60.0; req_3: SAME POS FOR 252 AS 251 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 252.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 255.000 sequence_1: USE TF1 aperture: 1 sp_element: F583W req_1: SEQ 255-256 NO GAP; req_2: POS TARG 279.0,-55.5 ; req_3: SAME POS FOR 256 AS 255 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 256.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 261.000 sequence_1: USE TF1 aperture: ^ sp_element: F583W req_1: SEQ 261-262 NO GAP; req_2: POS TARG 446.8,-153.0; req_3: SAME POS FOR 262 AS 261 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 262.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! linenum: 271.000 sequence_1: USE TF1 aperture: ^ sp_element: F583W req_1: SEQ 271-272 NO GAP; req_2: POS TARG 483.6,-105.6; req_3: SAME POS FOR 272 AS 271 comment_1: ACQUIRE AT START OF ORBIT. comment_2: NO REACQUISITIONS. comment_3: FINE LOCK GUIDING IF comment_4: GS BRIGHTER THAN 13.0 ! linenum: 272.000 sequence_1: USE TF1 aperture: ^ sp_element: PUPIL ! ! end of exposure logsheet ! No scan data records found