! File: 2874C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:19:44:24 coverpage: title_1: WF/PC CYCLE 1 CALIBRATION: UV FLOOD proposal_for: CAL/WFC pi_title: DR. pi_fname: JOHN pi_mi: W. pi_lname: MACKENTY pi_inst: STSCI pi_country: USA pi_phone: (301)338-4559 keywords_1: UV FLOOD wf_pc: Y time_crit: Y pi_position: WF/PC INSTRUMENT SCI ! end of coverpage abstract: line_1: To achieve stable quantum efficiency performance for the line_2: overthinned areas of the CCDs, the chips must be flooded line_3: with ultraviolet light. This will produce a uniform line_4: quantum efficiency response over the entire CCD. The line_5: quantum efficiency stability is chiefly dependent on line_6: temperature. The exact amount of charging required to line_7: eliminate quantum efficiency instability will be line_8: determined in ground tests and SV. ! ! end of abstract general_form_proposers: lname: MACKENTY fname: JOHN title: DR. mi: W. inst: STSCI country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 0 line_1: This procedure is needed in order to accurately calibrate line_2: the instrument. The UV flooding produces instrument line_3: quantum efficiency stability. ! question: 3 section: 0 line_1: The HST will be pointed directly away from the sun line_2: (plus a small angle TBS) so that the ultra-violet light line_3: can be piped onto the CCDs. The time required for the line_4: UV flood is 4 orbits for the WF and 15 orbits for the PC. line_7: The scenario for the UV Flood is as follows: line_9: Flood the WFC - 4 orbits line_10: Take a WFC image (SUNPIX) line_11: Flood the PC - 15 orbits line_12: Flip the mirror back to WFC line_13: Take a WFC image (SUNPIX) line_14: Take 10 bias frames line_15: Wait 2-6 hours then take UV Baseline images of UV Standard. ! question: 4 section: 0 line_1: Instrument calibration ! question: 5 section: 0 line_1: A UV flood will be done when STScI determines that line_2: it is necessary as the result of lose of UV QE or the line_3: re-emergence of QEH. line_6: Prerequisites: line_7: The High-Temp Decontamination procedure is line_8: performed just before starting the UV Flood. line_9: During the entire UV-FLOOD sequence, when HST is line_10: maintaining a UV-FLOOD attitude of one degree off line_11: -V1 axis to the sun, the -V3 axis shall be oriented line_12: such that the WF/PC radiator is exposed to earth line_13: albedo as much of the orbit as feasible. This line_14: will ensure optimal/maximum achievable line_15: temperatures for the CCD's during UV-FLOOD, and line_16: hence minimize/eliminate the risk of collecting line_17: contaminants on the CCD windows which may line_18: polymerize when exposed to the intense sunlight line_19: during the actual UV FLOOD. The exact orientation line_20: of HST cannot be determined until the BETA-ANGLE line_21: is known (after HST is launched). ! question: 5 section: 2 line_1: QUESTION TO IMPLEMENTER: line_3: The exposure time specified for the actual flooding time line_4: represents the required number of orbits (4 for WFC and 15 line_5: for PC) assuming 60 minutes/orbits of sun. The shutter should line_6: not be closed during this entire time. Should the exposure line_7: time be equivalent to required time on target or required line_8: shutter open time? (348 minutes for WFC and 1404 minutes for line_9: PC) ! question: 6 section: 0 line_1: The long exposure is necessary to properly perform line_2: the calibraion of the instrument. ! question: 7 section: 0 line_1: These data will be archived at ScI and a report on the line_2: outcome of the observations will be prepared as an WF/PC line_3: Instrument Report by the TIB. ! !end of general form text general_form_address: lname: MACKENTY fname: JOHN category: PI inst: ST SCI ! lname: MACKENTY fname: JOHN mi: W. title: DR. inst: STSCI phone: (301) 338-4559 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: A+81D266 name_2: GSC4547-2196 descr_1: UV SPECTROPHOTOMETRIC STANDARD pos_1: RA = 09H 21M 29S +/- 0.1S, pos_2: DEC = 81D 43' 00" +/- 1", pos_3: PLATE-ID=00LN equinox: 2000 fluxnum_1: 1 fluxval_1: V= 12.1 +/- 0.5 ! ! end of fixed targets solar_system_targets: targnum: 2 name_1: SUN descr_1: OTHER UV SOURCE lev1_1: STD = SUN, ACQ = 30 ! ! end of solar system targets ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: UVBASELINE targname: A+81D266 config: WFC opmode: IMAGE aperture: W1 sp_element: G200L num_exp: 1 time_per_exp: 5S priority: 1 req_1: SEQ 1-8 NO GAP; req_2: SEQ 1-4 NON-INT; req_3: CYCLE 1/1-200; comment_1: ONLY READOUT 1 CCD. ! linenum: 2.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: W2 sp_element: ^ num_exp: ^ time_per_exp: ^ priority: ^ comment_1: ONLY READOUT 1 CCD. ! linenum: 3.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: W3 sp_element: ^ num_exp: ^ time_per_exp: ^ priority: ^ comment_1: ONLY READOUT 1 CCD. ! linenum: 4.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: W4 sp_element: ^ num_exp: ^ time_per_exp: ^ priority: ^ comment_1: ONLY READOUT 1 CCD. ! linenum: 5.000 sequence_1: ^ targname: ^ config: PC opmode: ^ aperture: P5 sp_element: ^ num_exp: ^ time_per_exp: 25S priority: ^ req_1: SEQ 5-8 NON-INT; comment_1: ONLY READOUT 1 CCD. ! linenum: 6.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: P6 sp_element: ^ num_exp: ^ time_per_exp: ^ priority: ^ comment_1: ONLY READOUT 1 CCD. ! linenum: 7.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: P7 sp_element: ^ num_exp: ^ time_per_exp: ^ priority: ^ comment_1: ONLY READOUT 1 CCD. ! linenum: 8.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: P8 sp_element: ^ num_exp: ^ time_per_exp: ^ priority: ^ comment_1: ONLY READOUT 1 CCD. ! linenum: 9.000 sequence_1: DEFINE sequence_2: SUNPIX targname: SUN config: WFC opmode: UVOBS aperture: ALL sp_element: F122M,F230W num_exp: 1 time_per_exp: 0.11S priority: 1 req_1: GUID TOL 0.01"; ! linenum: 10.000 sequence_1: DEFINE sequence_2: UVFLD-W targname: SUN config: WFC opmode: UVFLOOD num_exp: 1 time_per_exp: 240M priority: 1 req_1: GUID TOL 0.01"; comment_1: THIS REQUIRES FOUR ORBITS OF EXPOSURE. comment_2: THE SUN CAN BE SEEN ABOUT ONE HOUR comment_3: PER ORBIT, THUS THE 4 HOUR EXP TIME. comment_4: GUIDING CAN BE DONE ON GYROS. comment_5: SHUTTER SHOULD NOT BE CLOSED DURING comment_6: OCCULTATIONS. SEE GF 5 FOR QUESTIONS. ! linenum: 11.000 sequence_1: DEFINE sequence_2: UVFLD-PC targname: SUN config: PC opmode: UVFLOOD num_exp: 1 time_per_exp: 900M priority: 1 req_1: GUID TOL 0.01"; comment_1: THIS REQUIRES FIFTEEN ORBITS OF TIME. comment_2: THE GUIDING CAN BE DONE ON GYROS. comment_3: SHUTTER SHOULD NOT BE CLOSED comment_4: DURING OCCULTATIONS. ! linenum: 12.000 sequence_1: USE sequence_2: UVBASELINE req_1: SEQ 12-110 NO GAP; ! linenum: 20.000 targname: ORBIT-POLE config: WFC opmode: DECON aperture: ALL num_exp: 1 time_per_exp: 8H priority: 1 param_1: TEMP=HIGH ! linenum: 30.000 sequence_1: USE sequence_2: UVBASELINE ! linenum: 40.000 targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 32H priority: 1 param_1: FORMAT=AN req_1: PAR WITH 50; comment_1: INTENDED TO TAKE DATA THROUGH comment_2: LINE 70. ! linenum: 50.000 sequence_1: USE sequence_2: UVFLD-W comment_1: AFTER 3RD ORBIT TURN OFF HEATPIPE HTR. comment_2: AFTER 4TH ORBIT TURN ON: MECH PWR, comment_3: WFC TEC, AND CLOSE SHUTTER A. ! linenum: 60.000 sequence_1: USE sequence_2: SUNPIX comment_1: GUIDING ON GYROS. comment_2: PIC TO CHECK GUIDING AFTER 5 ORBITS ! linenum: 70.000 sequence_1: USE sequence_2: UVFLD-PC comment_1: CCD TEMPS WILL BE SET TO -92DEG C comment_2: AFTER FLOODING. ! linenum: 80.000 targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 2M priority: 1 param_1: FORMAT=AN comment_1: EXECUTE COMMANDS TO CLOSE SHUTTER A. comment_2: EXECUTE COMMAND TO MOVE PYRAMID comment_3: TO WFC POSITION. ! linenum: 90.000 sequence_1: USE sequence_2: SUNPIX comment_1: CCD TEMPS TO ABOUT -40 C. comment_2: CHECK PIC AFTER 16 ORBITS. comment_3: RECONFIGURE THE WF/PC POST FLOOD. comment_4: CLEAR SHUTTER BLADES BEFORE comment_5: MOVING MIRROR M1. ! linenum: 100.000 targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 3M priority: 1 param_1: FORMAT=AN comment_1: EXECUTE COMMANDS TO CLEAR SHUTTER comment_2: PRIOR TO COMMAND TO MOVE MIRROR M1 comment_3: TO STOW POSITION. ! linenum: 110.000 targname: BIAS config: PC opmode: IMAGE aperture: ALL sp_element: NONE num_exp: 10 time_per_exp: 0S priority: 1 comment_1: TURN ON PC TECS. comment_2: THESE BIAS FRAMES WILL ALLOW THE comment_3: EXAMINATION OF THE CCDS POST FLOOD. ! linenum: 120.000 sequence_1: DEFINE sequence_2: UVBSLN1 targname: A+81D266 config: # opmode: IMAGE aperture: # sp_element: G200L num_exp: 1 time_per_exp: 1S priority: 1 ! linenum: 130.000 sequence_1: USE sequence_2: UVBSLN1 config: WFC aperture: W1 time_per_exp: X5 req_1: AFTER 110 BY 4H +/- 2H comment_1: THE COLD JUNCTION TEMP MUST BE comment_2: COLDER THAN -40 DEG C. ! linenum: 140.000 sequence_1: USE sequence_2: UVBSLN1 config: WFC aperture: W2 time_per_exp: X5 ! linenum: 150.000 sequence_1: USE sequence_2: UVBSLN1 config: WFC aperture: W3 time_per_exp: X5 ! linenum: 160.000 sequence_1: USE sequence_2: UVBSLN1 config: WFC aperture: W4 time_per_exp: X5 ! linenum: 170.000 sequence_1: USE sequence_2: UVBSLN1 config: PC aperture: P5 time_per_exp: X25 ! linenum: 180.000 sequence_1: USE sequence_2: UVBSLN1 config: PC aperture: P6 time_per_exp: X25 ! linenum: 190.000 sequence_1: USE sequence_2: UVBSLN1 config: PC aperture: P7 time_per_exp: X25 ! linenum: 200.000 sequence_1: USE sequence_2: UVBSLN1 config: PC aperture: P8 time_per_exp: X25 req_1: GROUP 130-200 WITHIN 220M ! ! end of exposure logsheet ! No scan data records found