! File: 1455C.PROP ! Database: PEPDB ! Date: 16-FEB-1994:19:20:09 coverpage: title_1: HRS ELECTRONIC DARK COUNT TEST proposal_for: OV/HRS pi_fname: JOHN pi_lname: TROELTZSCH pi_inst: BALL AEROSPACE SYSTEMS DIV. pi_country: USA pi_phone: 303-939-5781 keywords_1: HRS, ORBITAL VERIFICATION hours_par: 1.70 hrs: Y pi_position: OV TEST ENGINEER ! end of coverpage abstract: line_1: This test will help determine the levels of electronic noise effecting HRS line_2: operation. It will provide an initial evaluation of noise levels vs. orbital line_3: position. This data will be used to begin calibration of the anti-coincidence line_4: thresholds and provide data quality checks for radiation effects. No updates line_5: to HRS operational parameters are required in any of the data bases. ! ! end of abstract general_form_proposers: lname: KRUEGER fname: VERN inst: GODDARD SPACE FLIGHT CENTER country: USA ! lname: GARNER fname: HARRY inst: BALL AEROSPACE SYSTEMS DIV. country: USA ! lname: EBBETS fname: DENNIS inst: BALL AEROSPACE SYSTEMS DIV. country: USA ! lname: WILLIAMS fname: BRUCE 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 OV Objectives: line_2: 1. Verify the dark count rate is within specification. line_3: 2. Identify noisy data channels. line_4: 3. Provide data on the orbital radiation environment. ! question: 3 section: 1 line_1: The HRS will be transitioned from hold mode to operate with high voltage line_2: disabled on side 1. The flight software will be enabled, and an OST will be line_3: executed to perform 16 70.00 second dark counts using the repeat observation line_4: feature. Each 70.0 second dark will consist of 7 bins of 10.0 second dark line_5: count data. Side 1 will then be transitioned back to hold, and the test will line_6: be repeated for side 2. line_8: During OV anti-coincidence data censoring should be disabled during this test. line_9: As radiation data is analyzed, and a better understanding of noise effects line_10: develop, this test will be run with different values for the anti-coincidence line_11: thresholds to calibrate operational values for the anti-coincidence hardware. ! question: 5 section: 1 line_1: This proposal includes four dark counts in two scheduled activities. Two dark line_2: counts should occur well outside the SAA, line_3: and two during SAA passage. This test will also be run during SV, and may line_4: become a routine calibration. High voltage must not be turned on for this test line_5: during OV, however, this test may be run in SV with high voltage turned on. line_6: There should be a minimum 1 day wait between the HRS Orbital Flight Software line_7: Test and this test. line_9: Prerequisites: line_10: 1. Proposal 1454 HRS Orbital Flight Software Test must have been successfully line_11: run. ! question: 5 section: 2 line_1: This is an internal test and does not require any special pointing of the line_2: telescope. This test does not require the HRS to be the prime instrument. line_4: There is no target list with this proposal. ! question: 7 section: 1 line_1: 1. Compare the mean count rates for the 500 science diodes, 4 corner diodes, 5 line_2: focus diodes, and 2 radiation diodes. line_4: 2. Correlate count rates with orbital circumstances. line_6: 3. Look for noise correlations with other HST activities. line_8: 4. Look for unusually noisy channels or quiet channels. line_10: No updates to the project databases are required. The data will be used for line_11: long term trend analysis of HRS noise levels and establishing anti-coincidence line_12: thresholds. ! question: 10 section: 1 line_1: 1. Test design support line_3: 2. Test execution support team line_5: 3. Data analysis facilities line_7: 4. Data analysis personnel ! !end of general form text general_form_address: lname: KRUEGER fname: VERN inst: GODDARD SPACE FLIGHT CENTER addr_1: GSFC CODE 683 city: GREENBELT state: MD zip: 20771 country: USA phone: 301-286-5004 ! lname: TROELTZSCH fname: JOHN category: PI inst: BALL AEROSPACE SYSTEMS DIV. addr_1: P.O BOX 1062 city: BOULDER state: CO zip: 80306 country: USA phone: 303-939-4816 ! ! 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: DARKCNT targname: DARK config: HRS opmode: PHOTOSCAN aperture: NONE sp_element: # num_exp: 16 time_per_exp: 70S priority: 1 param_1: TYPE=SHORT-X, param_2: SPACING=0, param_3: HIGH-VOLTAGE=OFF, req_1: NON-INT; comment_1: NO HV. ANTI-COINCIDENCE CENSOR OFF. comment_2: USE SUB-STEP PATTERN DEFINED IN HRS comment_3: DEFAULT OST ZDARKPAT. ! linenum: 2.000 sequence_1: USE sequence_2: DARKCNT sp_element: SAFE1 comment_1: RUN IN A LOW RADIATION PORTION OF THE comment_2: ST ORBIT, WELL OUTSIDE OF THE SAA. comment_3: USE DETECTOR 1. ! linenum: 3.000 sequence_1: USE sequence_2: DARKCNT sp_element: SAFE2 comment_1: RUN IN A LOW RADIATION PORTION OF THE comment_2: ST ORBIT, WELL OUTSIDE OF THE SAA. comment_3: USE DETECTOR 2. ! linenum: 4.000 sequence_1: USE sequence_2: DARKCNT sp_element: SAFE1 comment_1: RUN IN A HIGH RADIATION PORTION OF THE comment_2: SAA. comment_3: USE DETECTOR 1. ! linenum: 5.000 sequence_1: USE sequence_2: DARKCNT sp_element: SAFE2 comment_1: RUN IN A HIGH RADIATION PORTION OF THE comment_2: SAA. comment_3: USE DETECTOR 2. ! ! end of exposure logsheet ! No scan data records found