! File: 2168C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:02:20:42 coverpage: title_1: G-HRS CARROUSEL PEFORMANCE proposal_for: SV/HRS pi_fname: DENNIS pi_mi: C. pi_lname: EBBETS pi_inst: BALL AEROSPACE SYSTEMS GROUP pi_country: USA pi_phone: 303-939-5964 keywords_1: GHRS,CALIBRATION,CARROUSEL,FLIGHT SOFTWARE hours_par: 6.40 hrs: Y ! end of coverpage abstract: line_1: This is an internal test using only the spectral calibration lamp line_2: lamp as a target. There are four parts, designed to measure: line_4: 1. Mechanical settling time after FPSPLIT type rotations. line_5: 2. FPSPLIT overhead times with 2 different flight s/w algorithms. line_6: 3. WSCAN overhead times with 2 different flight s/w algorithms. line_7: 4. Spectral image stability over 45 minutes. line_9: These test provide valuable information about the performance of line_10: the carrousel in the HST orbital environment, and timing of the line_11: carrousel control s/w in the flight operational system. The line_12: results will be used to select an appropriate delay time for the line_13: stability check algorithm, and for estimating instrument overhead line_14: times for subsequent SV and GTO observations. line_16: Updated 8/24/89 to include the parallel S/C mode data within SEQ definitions line_17: (PStanley) ! ! end of abstract general_form_proposers: lname: LINDLER fname: D. mi: J. inst: ADVANCED COMPUTER CONCEPTS country: USA ! lname: GARNER fname: H. mi: W. inst: BALL AEROSPACE SYSTEMS GROUP country: USA ! lname: EBBETS fname: DENNIS mi: C. inst: BALL AEROSPACE SYSTEMS GROUP country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: The test obtains data to evaluate the performance of the grating line_2: carrousel in the zero gravity orbital environment, and the timing line_3: characteristics of the flight software carrousel control line_4: algorithms. There are five important characteristics measured in line_5: four test segments. Each segment is defined for Side 2 (EL lines line_6: 1-14) and Side 1 (EL lines 15-28). line_8: 1. Settling times: After a very small carrousel rotation, such as line_9: will be used for FPSPLIT subexposures, how many seconds must line_10: elapse before the motion has ceased and the image is steady? This line_11: is purely the mechanical settling time, independent of s/w overhead. line_13: 2. FPSPLIT timing: During a series of FPSPLIT subexposures, what line_14: is the actual overhead time of the software operations? We will line_15: examine two cases, referred to here as the "full stability line_16: check" and the "short cut algorithm". This test also provides line_17: data useful for evaluating the carrousel repeatibility, which line_18: will influence the frequency with which wavelength calibrations line_19: must be made. ! question: 2 section: 2 line_1: 3. WSCAN timing: Since the G-HRS records only a short segment of line_2: the spectrum in a single observation, a sequence of exposures at line_3: different carrousel positions will often be required. This test line_4: uses a representative scan to empirically measure the overhead line_5: time associated with carrousel motions. Again both the full line_6: stability check and the shortcut algorithm will be used. line_8: 4. Image stability: If an observation of a faint source requires line_9: 30 minutes or longer, is it safe to make one long exposure, or line_10: should a series of shorter exposures be made? Will the image line_11: drift enough in 30 minutes to degrade the resolution? This is a line_12: system level test in whicgh effects due to carrousel motion, line_13: detector instability and thermal drifts will all influence the line_14: new stability of the spectral image. ! question: 3 section: 1 line_1: 1. Settling time: The carrousel and Y deflection are set to place line_2: a bright emission line near one end of the diode array. A RAPID line_3: readout observation is started with 200 msec sample time. Once line_4: every 15 seconds the carrousel is moved, via a hardware command, line_5: by 4 encoder steps. This will move the image by about 20 diodes. line_6: This is repeated 16 times. About 1200 readouts are produced in 4 line_7: minutes of integrating. The test is run twice, with the carrousel line_8: position incremented in both directions. line_9: 2. FPSPLIT timing: At each of 3 wavelengths an observation is line_10: made with 4 FPSPLIT subexposurtes. The sequence is repeated 4 line_11: times, not necessarily back to back. The test is run once with line_12: the "full stability check" and again with the "shortcut line_13: algorithm". Each carrousel position is visited 8 times, allowing line_14: repeatability to be measured as well. line_15: The study of repeatability involves both mechanical and thermal line_16: considerations. We have requested S/C parallel data observations to line_17: acquire engineering telemetry data. This will allow temperature data line_18: to be obtained while the tests are performed. ! question: 3 section: 2 line_1: 3. WSCAN timing: The SC2 lamp spectrum is scanned between 1200- line_2: 1900 A in steps of 20 A with G160M (36 exposures at lambda = 1200, line_3: 1220,1240....1880, 1900), and from 1150 - 1600 A in steps of 15 line_4: A with G140M (31 exposures a lambda = 1150, 1165, 1180...1585, line_5: 1600). Both carrousel algorithms are used. line_6: 4. Image stability: An observation of a bright isolated emission line_7: lines is made, consisitng of a new SPYBAL offset, and quarter line_8: stepped sampling in X. The observation is repeated 50 times to line_9: measure the image location in both X and Y. If repeated without line_10: interruptions the series would require about 45 minutes. ! question: 4 section: 1 line_1: Similar tests have been performed during the ground based line_2: development, and as part of the A&V activities. The mechanical line_3: performance is likely to be slightly different in zero G. The line_4: ground tests have not duplicated G-HRS software operations in the line_5: flight environment, including such issues as the mechanism motion line_6: flag and the spacecraft stable flag. ! question: 5 section: 1 line_1: SV Prerequisites: line_2: i9.1 G140M spectral lamp mini-functional (Prop ID 2767) line_3: i9.2 G160M " (Prop ID 2767) line_4: i9.4 G270M " (Prop ID 2767) line_5: i9.6 Ech-A " (Prop ID 2766) line_6: i9.7 Ech_B " (Prop ID 2766) line_8: This carrousel test should be run after the OLT SI interference line_9: test (Prop ID 2173) if the Delta Plan interference tests are scheduled. line_10: If desired, a subset of this proposal could line_11: be used as the GHRS carrousel motion segment of the SI line_12: interference test. line_14: Operation of G270M at 1970 Angstroms, outside of its normal operating line_15: wavelength range, is intentional. ! question: 5 section: 2 line_1: Lines 2,3,16,17: each must be a continuous 4 minute exposure. line_2: Lines (4-6),(7-9),(18-20),(21-23) must be performed in sequence line_3: within each group. Repeats (10,11,24,25) may be scheduled back to line_4: back or over several days if necessary. No restrictions on the line_5: execution of the 4 tests with respect to each other. line_6: Lines 12,13,26,27: the WSCAN series should each be performed line_7: without interruption if possible. There is no necessary time line_8: relationship bwtween the four scans though. line_9: Lines 14,28: the 50 repeated exposures should be made within one line_10: orbit if at all possible, but the intervals between them need not line_11: be uniform. There is no necessary connection between 14 and 28. ! question: 5 section: 3 line_1: The side 2 observations, lines 1-14 must be regarded as minimum line_2: plan SV tests. line_4: All exposures use the internal lamp. There is no Target List line_5: with this proposal. line_7: I have assumed that all internal tests can be performed as line_8: parallel operations. Only parallel observing time has been line_9: requested. line_11: We request that all of the GHRS engineering data obtained during line_12: this test be captured and made available to us. We need to line_13: examine the temperature data as part of the image stability line_14: analysis. Parallel S/C mode observations are requested. The line_15: "time per exposure" of the S/C parallel observations is an estimate line_16: of the GHRS exp.time plus some pad. If scheduling stretches line_17: the observations, we request that the S/C mode be stretched to line_18: span the same time interval as the GHRS data. line_20: SV Minimum Plan: lines 1-14, lines 27.5-28 line_21: SV Delta Plan: lines 15-27 line_22: Guiding Tolerance: None - internal test only ! question: 7 section: 1 line_1: 1. Settling times: Measure times from acquisition of Fine JTrack line_2: Lock signal to stable image position after each carrousel line_3: movement. Compile statistics and recommend delay time for use in line_4: shortcut algorithm. line_5: 2. FPSPLIT timing: Compare time tag signals from each observation line_6: to infer carrousel overhead times. Cross correlate all images line_7: taken at a common carrousel position to measure repeatability. line_8: Compare line widths to guage adequacy of settling time. line_9: 3. WSCAN timing. Compare time tags to infer carrousel overhead line_10: times. Compile atlas of SC2 lamp spectrum. Derive dispersion line_11: constants, Y deflections and resolving powers. line_12: 4. Image stability: Use SPYBAL offsets to monitor Y position. line_13: Cross correlate spectra to measure X position. Analyze as line_14: functions of time and G-HRS temperatures and gradients. Coadd line_15: profiles to measure wings of Echelle scatted light function. line_17: Measure temperatures and temperature gradients as functions of line_18: time. Eaxamine possible correlations between image drifts or line_19: displacements with thermal conditions. ! question: 10 section: 1 line_1: test personnel line_2: travel support line_3: publication support line_4: data analysis facilities ! !end of general form text general_form_address: lname: EBBETS fname: DENNIS mi: C. category: PI inst: BALL AEROSPACE SYSTEMS GROUP addr_1: P.O.BOX 1062, FT-3 city: BOULDER state: CO zip: 80306 country: USA phone: 303-939-5964 ! ! end of general_form_address records ! No fixed target records found ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 0.500 targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 2M priority: 1 req_1: PAR WITH 1; req_2: CYCLE 0 / 0.5-28; comment_1: INTENT IS FOR S/C MODE ENG. DATA comment_2: TO SPAN FULL DURATION OF GHRS OBS. comment_3: IF SCHEDULING STRETCHES OBS., PLEASE comment_4: ADJUST ALL S/C MODE DURATION. comment_5: SEE G.F. SECTION 5. ! linenum: 1.000 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G270M wavelength: 3050 num_exp: 1 time_per_exp: 16S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=3, param_3: COMB=FOUR, req_1: CALIB FOR 2,3; comment_1: COMPUTE AND APPLY NEW comment_2: SPYBAL OFFSET. ! linenum: 1.500 targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 5M priority: 1 req_1: PAR WITH 2; ! linenum: 2.000 targname: WAVE config: HRS opmode: RAPID aperture: SC2 sp_element: G270M wavelength: 3078.8 num_exp: 1 time_per_exp: 240S priority: 9 param_1: SAMPLE-TIME=0.2 comment_1: INCREASE ENCODER POSITION BY comment_2: 4 STEPS EVERY 15 SECONDS comment_3: FOR 16 TIMES. ! linenum: 2.500 targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 5M priority: 1 req_1: PAR WITH 3; ! linenum: 3.000 targname: WAVE config: HRS opmode: RAPID aperture: SC2 sp_element: G270M wavelength: 3030.3 num_exp: 1 time_per_exp: 240S priority: 9 param_1: SAMPLE-TIME=0.2 comment_1: DECREASE ENCODER POSITION BY comment_2: 4 STEPS EVERY 15 SECONDS comment_3: FOR 16 TIMES. comment_4: LINES 1-3 DESCRIBE THE SETTLING comment_5: TIME TEST FOR SIDE 2. ! linenum: 3.500 sequence_1: DEF G4FPL targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 12M priority: 1 req_1: PAR WITH 4; ! linenum: 4.000 sequence_1: DEF G4FPL targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G270M wavelength: 1970 num_exp: 1 time_per_exp: 54.4S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=5, param_3: FP-SPLIT=STD, param_4: COMB=TWO, req_1: SEQ 4-6 NO GAP ! linenum: 5.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: 2490 num_exp: ^ time_per_exp: ^ priority: 9 param_1: ^ ! linenum: 6.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: 3050 time_per_exp: ^ priority: 9 param_1: ^ comment_1: FOR 4-6, USE "FULL STABILITY CHECK" comment_2: CARROUSEL ALGORITHM. ! linenum: 6.500 sequence_1: DEF G4FPS targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 12M priority: 1 req_1: PAR WITH 7; ! linenum: 7.000 sequence_1: DEF G4FPS targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G270M wavelength: 1970 num_exp: 1 time_per_exp: 54.4S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=5, param_3: FP-SPLIT=STD, param_4: COMB=TWO, req_1: SEQ 7-9 NO GAP; ! linenum: 8.000 sequence_1: DEF G4FPS targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G270M wavelength: 2490 num_exp: 1 time_per_exp: 54.4S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=5, param_3: FP-SPLIT=STD, param_4: COMB=TWO, req_1: SEQ 7-9 NO GAP; ! linenum: 9.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: 3050 num_exp: 1 time_per_exp: ^ priority: ^ param_1: ^ req_1: ^ comment_1: FOR 7-9, USE "SHORTCUT ALGORITHM" ! linenum: 10.000 sequence_1: USE G4FPL req_1: REPEAT 10 EVERY 1D +/- 1.0D FOR 1 req_2: MORE TIMES; ! linenum: 11.000 sequence_1: USE G4FPS req_1: REPEAT 11 EVERY 1D +/-1.0D req_2: FOR 1 MORE TIMES; comment_1: LINES 4-11 DESCRIBE THE FPSPLIT comment_2: TIMING TEST FOR SIDE 2. ! linenum: 12.000 targname: WAVE config: HRS opmode: WSCAN aperture: SC2 sp_element: G160M wavelength: 1190-1910 num_exp: 1 time_per_exp: 979.2S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=5, param_3: COMB=TWO, param_4: WAVE-STEP=20, comment_1: USE "FULL STABILITY CHECK" FOR 12 comment_2: CENTRAL WAVELENGTHS= 1200, comment_3: 1220,1240...1900 LINES 12-13. comment_4: 36 CARROUSEL POSITIONS. ! linenum: 13.000 targname: WAVE config: HRS opmode: WSCAN aperture: SC2 sp_element: G160M wavelength: 1190-1910 num_exp: 1 time_per_exp: 979.2S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=5, param_3: COMB=TWO, param_4: WAVE-STEP=20, comment_1: USE "SHORTCUT ALGORITHM" FOR 13 comment_2: 36 CARROUSEL POSITIONS. ! linenum: 13.500 targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 50M priority: 1 req_1: PAR WITH 14; ! linenum: 14.000 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: ECH-B18 wavelength: 3064 num_exp: 150 time_per_exp: 13.6S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=7, param_3: COMB=TWO, comment_1: GROUP 14 WITHIN 90M; comment_2: LINE 14 DESCRIBES IMAGE STABILITY comment_3: TEST FOR SIDE 2. COMPUTE AND comment_4: APPLY NEW SPYBAL EACH EXP. ! linenum: 15.000 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G140M wavelength: 1510 num_exp: 1 time_per_exp: 16S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=3, param_3: COMB=FOUR, req_1: CALIB FOR 16,17; req_2: COND IF SV DELTA PLAN; comment_1: COMPUTE AND APPLY NEW SPYBAL OFFSET. ! linenum: 15.500 targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 5M priority: 1 req_1: PAR WITH 16; req_2: COND IF SV DELTA PLAN; ! linenum: 16.000 targname: WAVE config: HRS opmode: RAPID aperture: SC2 sp_element: G140M wavelength: 1517 num_exp: 1 time_per_exp: 240S priority: 9 param_1: SAMPLE-TIME=0.2 req_1: COND IF SV DELTA PLAN; comment_1: INCREASE ENCODER POSITION BY 4 STEPS comment_2: EVERY 15 SECONDS FOR 16 TIMES. ! linenum: 16.500 targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 5M priority: 1 req_1: PAR WITH 17; req_2: COND IF SV DELTA PLAN; ! linenum: 17.000 targname: WAVE config: HRS opmode: RAPID aperture: SC2 sp_element: G140M wavelength: 1501 num_exp: 1 time_per_exp: 240S priority: 9 param_1: SAMPLE-TIME=0.2 req_1: COND IF SV DELTA PLAN; comment_1: DECREASE ENCODER POSITION BY 4 STEPS comment_2: EVERY 15 SECONDS FOR 16 TIMES. comment_3: LINES 15-17 DESCRIBE THE SETTLING comment_4: TIME TEST FOR SIDE 1. ! linenum: 17.500 sequence_1: DEF G1FPL targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 12M priority: 1 req_1: PAR WITH 18; ! linenum: 18.000 sequence_1: DEF G1FPL targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G140M wavelength: 1250 num_exp: 1 time_per_exp: 54.4S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=5, param_3: FP-SPLIT=STD, param_4: COMB=TWO, req_1: SEQ 18-20 NO GAP; ! linenum: 19.000 sequence_1: ^ targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: 1510 num_exp: ^ time_per_exp: ^ priority: ^ param_1: ^ req_1: ^ ! linenum: 20.000 sequence_1: DEF G1FPL targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G140M wavelength: 1775 num_exp: 1 time_per_exp: 54.4S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=5, param_3: FP-SPLIT=STD, param_4: COMB=TWO, req_1: SEQ 18-20 NO GAP; comment_1: USE "FULL STABILITY CHECK" FOR 18-20 ! linenum: 20.500 sequence_1: DEF G1FPS targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 12M priority: 1 req_1: PAR WITH 21; ! linenum: 21.000 sequence_1: DEF G1FPS targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G140M wavelength: 1250 num_exp: 1 time_per_exp: 54.4S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=5, param_3: FP-SPLIT=STD, param_4: COMB=TWO, req_1: SEQ 21-23 NO GAP; ! linenum: 22.000 sequence_1: DEF G1FPS targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G140M wavelength: 1510 num_exp: 1 time_per_exp: 54.4S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=5, param_3: FP-SPLIT=STD, param_4: COMB=TWO, req_1: SEQ 21-23 NO GAP; ! linenum: 23.000 sequence_1: DEF G1FPS targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: G140M wavelength: 1775 num_exp: 1 time_per_exp: 54.4S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=5, param_3: FP-SPLIT=STD, param_4: COMB=TWO, req_1: SEQ 21-23 NO GAP; comment_1: USE "SHORTCUT ALGORITHM" FOR 21-23 ! linenum: 24.000 sequence_1: USE G1FPL req_1: REPEAT 24 EVERY 1D +/- 0.5D req_2: FOR 3 MORE TIMES; req_3: COND IF SV DELTA PLAN; ! linenum: 25.000 sequence_1: USE G1FPS req_1: REPEAT 25 EVERY 1D +/-0.5D req_2: FOR 3 MORE TIMES; req_3: COND IF SV DELTA PLAN; comment_1: LINES 18-25 DESCRIBE THE FPSPLIT comment_2: TIMING TEST FOR SIDE 1. ! linenum: 26.000 targname: WAVE config: HRS opmode: WSCAN aperture: SC2 sp_element: G140M wavelength: 1142.5-1607.5 num_exp: 1 time_per_exp: 843.2S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=5, param_3: COMB=TWO, param_4: WAVE-STEP=15 req_1: COND IF SV DELTA PLAN; comment_1: USE "FULL STABILITY CHECK" FOR 26. comment_2: CENTRAL WAVELENGTHS=1150,1165, comment_3: 1180...1600 LINES 26,27. comment_4: 31 CARROUSEL POSITIONS. ! linenum: 27.000 targname: WAVE config: HRS opmode: WSCAN aperture: SC2 sp_element: G140M wavelength: 1142.5-1607.5 num_exp: 1 time_per_exp: 843.2S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=5, param_3: COMB=TWO, param_4: WAVE-STEP=15, req_1: COND IF SV DELTA PLAN; comment_1: USE "SHORTCUT ALGORITHM" FOR 27. comment_2: LINES 26&27 DESCRIBE WSCAN TIMING comment_3: TEST FOR SIDE 1. comment_4: 31 CARROUSEL POSITIONS. ! linenum: 27.500 targname: DARK config: S/C opmode: DATA aperture: NONE num_exp: 1 time_per_exp: 50M priority: 1 req_1: PAR WITH 28; ! linenum: 28.000 targname: WAVE config: HRS opmode: ACCUM aperture: SC2 sp_element: ECH-A37 wavelength: 1509 num_exp: 150 time_per_exp: 13.6S priority: 9 param_1: DOPPLER=OFF, param_2: STEP-PATT=7, param_3: COMB=TWO, comment_1: LINE 28 DESCRIBES IMAGE STABILITY comment_2: TEST FOR SIDE 1. COMPUTE AND comment_3: APPLY NEW SPYBAL EACH EXP. comment_4: 27.5 AND 28 ARE SV MINIMUM PLAN TESTS. ! ! end of exposure logsheet ! No scan data records found