Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5591 Report Date: 18-Jul-95:17:42 Version: ********** Check-in Date: ********** 1.Proposal Title: GHRS SIDE 2 "LOCATE=EXTENDED" TEST--CYCLE 4 ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID CAL/HRS Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Dr. Stephen J. Hulbert STSCI USA 301-338-4911 ------------------------------------------------------------------------------------ 7. Abstract This proposal will test the new commanding capability of using more than just the two central target acquisition diodes during the locate phase of a target acquisition. An extended object will be acquired and the fine x-balancing will be done with 2, 4, 6, and 8 diodes to test all possible modes of this new capability. ------------------------------------------------------------------------------------ 8. Scientific Key Words: CALIBRATION ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 4.00 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: HRS ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5591 PI: Dr. Stephen J. Hulbert Proposal Title: GHRS SIDE 2 "LOCATE=EXTENDED" TEST--CYCLE 4 ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Dr. Stephen Hulbert STSCI USA Dr. David Soderblom STSCI USA ------------------------------------------------------------------------------------ 2. Scientific Justification. The goal of this test is to exercise the new commanding capability that permits a better fine x-centering during the locate phase of a target acquistion (or during an ACQ/PEAKUP.) The locate phase first centers the object in y: first coarse, then fine. The locate phase next centers in x; again in two steps: coarse and fine. During the coarse balance the GHRS attempts to position the object such that the 4th target acquistion diode is recording the greatest flux (there are 8 target acquisition diodes.) Previously, the second step was to use two deflection steps to move the object toward diode 5--stopping when diode 5 recorded the greatest flux. The object was then effectively centered when the flux was balanced between diodes 4 and 5. With the new commanding we now have the ability to specify using diode 4 vs. diode 5 or the sum of diodes 3 and 4 vs. the sum of diodes 5 and 6 or the sum of diodes 2 and 3 and 4 vs., etc. during the fine centering. This should improve our ability to properly center extended objects. ------------------------------------------------------------------------------------ 3. Description of proposed observations. The test consists of the following steps: 1. ACQ w/ LOCATE=NO 2. IMAGE 3. ACQ/PEAKUP and POSTARG=1,1 4. IMAGE 5. ACQ/PEAKUP w/ EXTENDED=2 and POSTARG=1,1 6. IMAGE 7. ACQ/PEAKUP w/ EXTENDED=3 and POSTARG=1,1 8. IMAGE 9. ACQ/PEAKUP w/ EXTENDED=4 and POSTARG=1,1 10. IMAGE 11. ACQ w/ LOCATE=EXTENDED and a POSTARG=+2,+2 12. IMAGE ------------------------------------------------------------------------------------ 11. Address Information Name: STEPHEN HULBERT Category: PI Institution: SPACE TELESCOPE SCIENCE INSTITIUE Address: 3700 SAN MARTIN DRIVE City: BALTIMORE State: MD Zip Code: 21218 Country: USA Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ Name: DAVID SODERBLOM Category: CON Institution: SPACE TELESCOPE SCIENCE INSTITIUE Address: 3700 SAN MARTIN DRIVE City: BALTIMORE State: MD Zip Code: 21218 Country: USA Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST b)Solar System Targets ID = 5591 [ 3] ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 | TARGET NAME: IO ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE IO ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 | TARGET POSITION LEVEL 2 | STD=JUPITER | STD=IO | ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 | WINDOWS | | SEP OF JUPITER IO FROM EARTH GT 30" | SEP OF CALLISTO IO FROM EARTH GT 10" | SEP OF EUROPA IO FROM EARTH GT 10" | SEP OF GANYMEDE IO FROM EARTH GT 10" | ------------------------------------------------------------------------------------------------------------------------------------ REF | DATA | COMMENTS | | 1 |SURF(V) = 5.8 +/- 0.5 | 2 |SIZE = 1.0 +/- .2 | | ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5591 [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 100 IO HRS ACQ 2.0 MIRROR-N2 SEARCH-SIZE=3 1 1.8S 10 1 1 ONBOARD ACQ FOR BRIGHT=RETURN 105-135 MAP=END-POINT SEQ 115-135 NO GAP LOCATE=NO CYCLE 4/100-135 Comments: STEP-TIME=0.2S MAP=END-POINT REQUIRED TO FORCE LOCATE=NO ------------------------------------------------------------------------------------------------------------------------------------ 105 IO HRS IMAGE 2.0 MIRROR-N2 NX=22 1 96.8S 10 1 1 NY=22 DELTA-X=4 DELTA-Y=4 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 110 IO HRS ACQ/ 2.0 MIRROR-N2 EXTENDED=NO 1 20.4S 10 1 1 POS TARG 1.0,1.0 PEAKUP ONBOARD ACQ FOR 111 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 111 IO HRS IMAGE 2.0 MIRROR-N2 NX=22 1 96.8S 10 1 1 NY=22 DELTA-X=4 DELTA-Y=4 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 115 IO HRS ACQ/ 2.0 MIRROR-N2 EXTENDED=2 1 20.4S 10 1 1 POS TARG 1.0,1.0 PEAKUP ONBOARD ACQ FOR 116 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 116 IO HRS IMAGE 2.0 MIRROR-N2 NX=22 1 96.8S 10 1 1 NY=22 DELTA-X=4 DELTA-Y=4 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 120 IO HRS ACQ/ 2.0 MIRROR-N2 EXTENDED=3 1 20.4S 10 1 1 POS TARG 1.0,1.0 PEAKUP ONBOARD ACQ FOR 121 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 121 IO HRS IMAGE 2.0 MIRROR-N2 NX=22 1 96.8S 10 1 1 NY=22 DELTA-X=4 DELTA-Y=4 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 125 IO HRS ACQ/ 2.0 MIRROR-N2 EXTENDED=4 1 20.4S 10 1 1 POS TARG 1.0,1.0 PEAKUP ONBOARD ACQ FOR 126 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5591 [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 126 IO HRS IMAGE 2.0 MIRROR-N2 NX=22 1 96.8S 10 1 1 NY=22 DELTA-X=4 DELTA-Y=4 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 130 IO HRS ACQ 2.0 MIRROR-N2 SEARCH-SIZE=3 1 1.8S 10 1 1 POS TARG 2.0,2.0 BRIGHT=RETURN ONBOARD ACQ FOR LOCATE=EXTENDED 135 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 135 IO HRS IMAGE 2.0 MIRROR-N2 NX=22 1 96.8S 10 1 1 NY=22 DELTA-X=4 DELTA-Y=4 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5591 [ 6] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations HRS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ IMAGE ACQ/PEAKUP ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SEARCH-SIZE=3 BRIGHT=RETURN MAP=END-POINT LOCATE=NO NX=22 NY=22 DELTA-X=4 DELTA-Y=4 EXTENDED=NO EXTENDED=2 EXTENDED=3 EXTENDED=4 LOCATE=EXTENDED ------------------------------------------------------------------------------------------------------------------------------------ Proposal for CAL/HRS ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 4.00 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 105-135; SEQ 115-135 NO GAP; CYCLE 4/100-135; POS TARG 1.0,1.0; ONBOARD ACQ FOR 111; ONBOARD ACQ FOR 116; ONBOARD ACQ FOR 121; ONBOARD ACQ FOR 126; POS TARG 2.0,2.0; ONBOARD ACQ FOR 135; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR-N2 ------------------------------------------------------------------------------------------------------------------------------------ Target Names IO ------------------------------------------------------------------------------------------------------------------------------------