! $Id: 5273,v 4.1 1994/07/27 16:14:46 pepsa Exp $ coverpage: title_1: GHRS SIDE 1 CARROUSEL COMMANDING VERIFICATION--CYCLE 4 sci_cat: CALIBRATION proposal_for: CAL/HRS pi_fname: DENNIS pi_mi: C. pi_lname: EBBETS pi_inst: BALL AEROSPACE AND COMMUNICATIONS GROUP pi_country: USA pi_phone: (303) 939-5964 keywords_1: HRS, CALIBRATION, SCIENCE VERIFICATION hours_pri: 0.14 num_pri: 1 hrs: Y ! end of coverpage abstract: line_1: This proposal defines a brief test to verify that the line_2: carrousel positions for GHRS side 1 optical elements can be line_3: properly commanded from the side 2 encoder and electronics. line_4: The test uses the internal spectral lamp SC2, and one line_5: exposure each with gratings G140L, G140M and Ech-A. These line_6: exposures are identical to the standard wavecal/spybal line_7: observations. Photoscan observations will be made with line_8: mirrors N1 and A1. One final ACCUM exposure will be made with line_9: mirror N1. This test should preceed any other use of the line_10: gratings or mirrors on side 1 that require specific carrousel line_11: positions. ! ! end of abstract general_form_proposers: lname: EBBETS fname: DENNIS inst: BACG country: USA ! lname: HULBERT fname: STEVE inst: STSCI country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: The proposal specifies one observation each for gratings line_2: G140L, G140M, Ech-A, two observations for mirror N1, and line_3: one for mirror A1. All observations use lamp SC2 as the line_4: source. The three grating exposures are exactly the standard line_5: wavecal/spybal procedures which were in use during SV and line_6: cycle 0 prior to the carrousel drive electronics problem. line_7: The photoscans will scan a short region of the photocathode line_8: centered on the expected Y position of the target acquisition line_9: images. The carrousel must be rotated to the position line_10: indicated in the comments (side 2 encoder values). These will line_11: place the images near diode 30 for the acquisition mirrors. line_12: The ACCUM observation with mirror N1 will have the image near line_13: the center of the diode array. ! question: 5 section: 1 line_1: The execution of this proposal should be the first use of line_2: side 1 which requires specific carrousel positions, other line_3: than the SAFE position for darks or intflats. The cross line_4: strapped commanding of the carrousel operation to allow side line_5: 1 optical elements to be positioned by the side 2 electronics line_6: was developed, but never tested against the flight hardware line_7: before the side 1 lvps problem caused the suspension of all line_8: side 1 activities. This proposal is a simple check that the line_9: commanding is correctly in place, and that the correct line_10: encoder positions are computed. If the results of this test line_11: are favorable, the spectral lamp mini-functional tests may line_12: be executed to refine the calibration functins. Therefore line_13: execute after side 1 high-voltage turn on and before 5273. line_14: This proposal requires OK from J. Skapik before execution. line_15: Program can be executed PRIOR to the COSTAR/GHRS deplyoment. ! question: 7 section: 1 line_1: The primary goal is to verify that the images are found in line_2: the expected locations. For the spectroscopic modes the line_3: requested wavelength should fall near the center of the line_4: diode array. Inspection of the spectra should give a quick line_5: verification, and a formal wavecal solution will give a line_6: precise value for the central wavelength. We expect the line_7: indicated wavelength to be within +/- 20 diodes of the center line_8: corresponding to +/- 1 mod 4 carrousel position. The photo line_9: scans should show the images near diode 30, with peak counts line_10: in the fourth bin. ! question: 10 section: 1 line_1: Data analysis line_2: Personnel line_3: Travel and Publications Support ! !end of general form text general_form_address: lname: Ebbets fname: Dennis category: PI inst: Ball Aerospace addr_1: PO Box 1062 AR1 city: Boulder state: CO zip: 80306 country: USA phone: 303 939 5964 ! lname: Hulbert fname: Steve category: CON inst: Space Telescope Science Inst. addr_1: 3700 San Martin Drive city: Baltimore state: MD zip: 21218 country: USA phone: 410 338 4911 ! ! end of general_form_address records ! No fixed target records found ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 100.000 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G140L wavelength: 1402.2 num_exp: 1 time_per_exp: 4.8S s_to_n: 50 fluxnum_1: 1 priority: 1 param_1: STEP-PATT=3, param_2: COMB=TWO, param_3: STEP-TIME=0.2, req_1: CYCLE 4 / 100-600; comment_1: COMPUTE AND APPLY NEW SPYBAL ! linenum: 200.000 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G140M wavelength: 1253.75 num_exp: 1 time_per_exp: 8.0S s_to_n: 50 fluxnum_1: 1 priority: 1 param_1: STEP-PATT=3, param_2: COMB=TWO, param_3: STEP-TIME=0.2, comment_1: COMPUTE AND APPLY NEW SPYBAL ! linenum: 300.000 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: ECH-A40 wavelength: 1403.56 num_exp: 1 time_per_exp: 32.0S s_to_n: 50 fluxnum_1: 1 priority: 1 param_1: STEP-PATT=3, param_2: COMB=TWO, param_3: STEP-TIME=1.0, comment_1: COMPUTE AND APPLY NEW SPYBAL ! linenum: 400.000 targname: WAVE config: HRS opmode: PHOTOSCAN aperture: SC2 sp_element: MIRROR-N1 num_exp: 1 time_per_exp: 14.0S s_to_n: 50 fluxnum_1: 1 priority: 1 param_1: TYPE=SHORT-Y, param_2: SPACING=32, param_3: X=2047, param_4: Y=1681, comment_1: CARROUSEL POSITION = 60084 ! linenum: 500.000 targname: WAVE config: HRS opmode: PHOTOSCAN aperture: SC2 sp_element: MIRROR-A1 num_exp: 1 time_per_exp: 89.25S s_to_n: 20 fluxnum_1: 1 priority: 1 param_1: TYPE=SHORT-Y, param_2: SPACING=32, param_3: X=2047, param_4: Y=2081, comment_1: CARROUSEL POSITION = 2104 ! linenum: 600.000 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: MIRROR-N1 num_exp: 1 time_per_exp: 32.0S s_to_n: 50 fluxnum_1: 1 priority: 1 param_1: STEP-PATT=3, param_2: COMB=TWO, param_3: STEP-TIME=1.0, comment_1: DO NOT PERFORM A DEFCAL IMMEDIATELY comment_2: PRIOR TO THIS EXPOSURE. ! ! end of exposure logsheet ! No scan data records found