! File: 2916C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:21:30:00 coverpage: title_1: GHRS THRESHOLD ADJUSTMENT TEST FOR SV proposal_for: SV/GHRS pi_fname: DENNIS pi_lname: EBBETS pi_inst: BALL AEROSPACE SYSTEMS pi_country: USA pi_phone: (303) 939-5964 keywords_1: HRS, SCIENCE VERIFICATION hours_par: 6.50 hrs: X pi_position: SV TEST ENGINEER ! end of coverpage abstract: line_1: This test will determine the optimal, non-standard discriminator thresholds line_2: for the few anomalous channels on each HRS detector. A 15 second flat field line_3: observation followed by a 210 second dark count is performed at each of 10 line_4: discriminator threshold values for each detector. The result of the test line_5: will be the optimal threshold values to be entered into the PDB. line_7: Modified 2/20/90 to change lines 9 & 25 from ACCUM mode observations to line_8: PHOTOSCAN observations per IDT request. ! ! end of abstract general_form_proposers: lname: GARNER fname: HARRY inst: BALL AEROSPACE SYSTEMS DIV. country: USA ! lname: EBBETS fname: DENNIS inst: BALL AEROSPACE SYSTEMS DIV. country: USA ! lname: TUFFLI fname: ANDREA inst: BALL AEROSPACE SYSTEMS DIV. country: USA ! lname: TROELTZSCH fname: JOHN inst: BALL AEROSPACE SYSTEMS DIV. country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: HRS SV Objectives: line_2: 1. Determine the optimal discriminator thresholds for all non-standard line_3: detector channels. line_5: Discriminator thresholds are derived from PHA data. The line_6: standard algorithm sets the threshold at 50% of the energy of the line_7: peak of the photoelectron pulse height distribution. On each line_8: detector there are a few special and/or slightly noisy channels line_9: which require non-standard threshold values. This test calibrates line_10: the thresholds for those channels to allow for the maximum number line_11: of diodes to be useable for routine science operations. ! question: 3 section: 1 line_1: The GHRS is configured for high voltage operation on side 1, and the most line_2: recent, default thresholds are loaded and verified. Next, a 10 second line_3: flat field followed by a 210 second dark count are taken to verify default line_4: threshold performance. A series of 10 sets of flat field and dark count line_5: data are then acquired for thresholds of 35 through 80 by increments of line_6: 5. The PHA processor is used to load each set of thresholds. Finally, line_7: the side 1 default thresholds are reloaded. The procedure is then line_8: repeated for side 2. line_10: This is an internal test, and requires no special pointing of the line_11: telescope. ! question: 5 section: 1 line_1: All exposures in this test should occur outside of the SAA. line_3: This test should be run 2 times during SV. It should be line_4: run within 2 weeks after each execution of the PHA test line_5: (1459). It is not necessary that side 1 (lines 4-19) and line_6: side 2 (20-35) be scheduled together. line_8: Prerequisites: line_9: 1. Proposal 1459, Pulse Height Analysis. line_11: Scheduling constraints: line_12: This test may be run in parallel with other SI tests. line_13: It should not be scheduled as an interleaver with other line_14: GHRS exposures. The individual segments of this test put line_15: thresholds in non-standard values, which are not reset line_16: until the end of the test, lines 19 and 35. line_17: The "group within 6 hours" is not a hard limit. It is line_18: intended to replace the "sequence no gap" in the OV line_19: version with a less restrictive requirement for SV. ! question: 7 section: 1 line_1: Count rates during the dark and flat field exposures will be measured as line_2: functions of threshold level. Thresholds for the special channels will be line_3: derived which bring their response as close as possible to the mean of line_4: other channels. line_6: Unuseable channels will be entered in the flight software bad diode table line_7: and/or the cross-talk table. Noisy and anomalous channels will be line_8: identified in the data reduction software. line_10: The threshold load PLCP groups in the PDB will be updated with the results. ! question: 8 section: 1 line_1: This is an internal test and does not require any special pointing of the line_2: telescope. line_4: No target list is required. ! question: 10 section: 1 line_1: 1. Test design support line_2: 2. Test execution support team line_3: 3. Data analysis facilities line_4: 4. Data analysis personnel ! !end of general form text general_form_address: lname: EBBETS fname: DENNIS category: PI inst: BALL AEROSPACE ! lname: TROELTZSCH fname: JOHN mi: R. category: CON inst: BASG country: USA phone: 303-939-5781 ! ! end of general_form_address records ! No fixed target records found ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: THRSHSET targname: INTFLAT config: HRS opmode: PULSE-HEIGHT aperture: NONE sp_element: # num_exp: 1 time_per_exp: 5S priority: 1 param_1: # req_1: SEQ 1-3 NO GAP; req_2: CYCLE 0/ 1-35; comment_1: INTEGRATE PERIOD=5S, DO NOT RELOAD comment_2: THRESHOLDS ! linenum: 2.000 sequence_1: DEFINE sequence_2: THRSHSET targname: INTFLAT config: HRS opmode: PHOTOSCAN aperture: NONE sp_element: ^ num_exp: 1 time_per_exp: 10S priority: 1 param_1: TYPE=SHORT-Y, param_2: SPACING=16, param_3: X=2048,Y=2048 ! linenum: 3.000 sequence_1: DEFINE sequence_2: THRSHSET targname: DARK config: HRS opmode: PHOTOSCAN aperture: NONE sp_element: ^ num_exp: 1 time_per_exp: 210S priority: 1 param_1: TYPE=SHORT-Y, param_2: SPACING=0, param_3: X=2048, param_4: Y=2048, ! linenum: 4.000 targname: DARK config: HRS opmode: THRESHOLD sp_element: SAFE1 num_exp: 1 time_per_exp: 14M priority: 1 param_1: FUNCTION=BOTH, req_1: GROUP 4.0-19.0 WITHIN 6H; req_2: REPEAT 4-19 EVERY 90D req_3: +/- 30D FOR 1 MORE TIMES ! linenum: 5.000 targname: INTFLAT config: HRS opmode: PHOTOSCAN aperture: NONE sp_element: SAFE1 num_exp: 1 time_per_exp: 10S priority: 1 param_1: TYPE=SHORT-Y, param_2: SPACING=16, param_3: X=2048,Y=2048 ! linenum: 6.000 targname: DARK config: HRS opmode: PHOTOSCAN aperture: NONE sp_element: SAFE1 num_exp: 1 time_per_exp: 210S priority: 1 param_1: TYPE=SHORT-Y, param_2: SPACING=0, param_3: X=2048, param_4: Y=2048, ! linenum: 7.000 targname: INTFLAT config: HRS opmode: PULSE-HEIGHT aperture: NONE sp_element: SAFE1 num_exp: 1 time_per_exp: 5S priority: 1 param_1: BEGIN=35, param_2: END=35, param_3: STEP=1 comment_1: INTEGRATE PERIOD=5S, DO NOT RELOAD comment_2: THRESHOLDS ! linenum: 8.000 targname: INTFLAT config: HRS opmode: PHOTOSCAN aperture: NONE sp_element: SAFE1 num_exp: 1 time_per_exp: 35S priority: 1 param_1: TYPE=SHORT-Y, param_2: SPACING=16, param_3: X=2048,Y=2048 ! linenum: 9.000 targname: DARK config: HRS opmode: PHOTOSCAN aperture: NONE sp_element: SAFE1 num_exp: 1 time_per_exp: 210S priority: 1 param_1: TYPE=SHORT-Y, param_2: SPACING=0, param_3: X=2048, param_4: Y=2048, ! linenum: 10.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE1 param_1: BEGIN=40, param_2: END=40, param_3: STEP=1 ! linenum: 11.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE1 param_1: BEGIN=45, param_2: END=45, param_3: STEP=1 ! linenum: 12.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE1 param_1: BEGIN=50, param_2: END=50, param_3: STEP=1 ! linenum: 13.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE1 param_1: BEGIN=55, param_2: END=55, param_3: STEP=1 ! linenum: 14.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE1 param_1: BEGIN=60, param_2: END=60, param_3: STEP=1 ! linenum: 15.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE1 param_1: BEGIN=65, param_2: END=65, param_3: STEP=1 ! linenum: 16.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE1 param_1: BEGIN=70, param_2: END=70, param_3: STEP=1 ! linenum: 17.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE1 param_1: BEGIN=75, param_2: END=75, param_3: STEP=1 ! linenum: 18.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE1 param_1: BEGIN=80, param_2: END=80, param_3: STEP=1 ! linenum: 19.000 targname: DARK config: HRS opmode: THRESHOLD sp_element: SAFE1 num_exp: 1 time_per_exp: 14M priority: 1 param_1: FUNCTION=BOTH, ! linenum: 20.000 targname: DARK config: HRS opmode: THRESHOLD sp_element: SAFE2 num_exp: 1 time_per_exp: 14M priority: 1 param_1: FUNCTION=BOTH, req_1: GROUP 20.0-35.0 WITHIN 6H; req_2: REPEAT 20-35 EVERY 90D req_3: +/- 30D FOR 1 MORE TIMES ! linenum: 21.000 targname: INTFLAT config: HRS opmode: PHOTOSCAN aperture: NONE sp_element: SAFE2 num_exp: 1 time_per_exp: 10S priority: 1 param_1: TYPE=SHORT-Y, param_2: SPACING=16, param_3: X=2048,Y=2048 ! linenum: 22.000 targname: DARK config: HRS opmode: PHOTOSCAN aperture: NONE sp_element: SAFE2 num_exp: 1 time_per_exp: 210S priority: 1 param_1: TYPE=SHORT-Y, param_2: SPACING=0, param_3: X=2048, param_4: Y=2048, ! linenum: 23.000 targname: INTFLAT config: HRS opmode: PULSE-HEIGHT aperture: NONE sp_element: SAFE2 num_exp: 1 time_per_exp: 5S priority: 1 param_1: BEGIN=35, param_2: END=35, param_3: STEP=1 comment_1: INTEGRATE PERIOD=5S, DO NOT RELOAD comment_2: THRESHOLDS ! linenum: 24.000 targname: INTFLAT config: HRS opmode: PHOTOSCAN aperture: NONE sp_element: SAFE2 num_exp: 1 time_per_exp: 35S priority: 1 param_1: TYPE=SHORT-Y, param_2: SPACING=16, param_3: X=2048,Y=2048 ! linenum: 25.000 targname: DARK config: HRS opmode: PHOTOSCAN aperture: NONE sp_element: SAFE2 num_exp: 1 time_per_exp: 210S priority: 1 param_1: TYPE=SHORT-Y, param_2: SPACING=0, param_3: X=2048, param_4: Y=2048, ! linenum: 26.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE2 param_1: BEGIN=40, param_2: END=40, param_3: STEP=1 ! linenum: 27.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE2 param_1: BEGIN=45, param_2: END=45, param_3: STEP=1 ! linenum: 28.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE2 param_1: BEGIN=50, param_2: END=50, param_3: STEP=1 ! linenum: 29.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE2 param_1: BEGIN=55, param_2: END=55, param_3: STEP=1 ! linenum: 30.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE2 param_1: BEGIN=60, param_2: END=60, param_3: STEP=1 ! linenum: 31.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE2 param_1: BEGIN=65, param_2: END=65, param_3: STEP=1 ! linenum: 32.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE2 param_1: BEGIN=70, param_2: END=70, param_3: STEP=1 ! linenum: 33.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE2 param_1: BEGIN=75, param_2: END=75, param_3: STEP=1 ! linenum: 34.000 sequence_1: USE sequence_2: THRSHSET sp_element: SAFE2 param_1: BEGIN=80, param_2: END=80, param_3: STEP=1 ! linenum: 35.000 targname: DARK config: HRS opmode: THRESHOLD sp_element: SAFE2 num_exp: 1 time_per_exp: 14M priority: 1 param_1: FUNCTION=BOTH, ! ! end of exposure logsheet ! No scan data records found