Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 2829c Report Date: 09-May-96:17:25 Version: ********** Check-in Date: ********** 1.Proposal Title: RADIATION MONITORING OLT ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID CAL/OTA Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Dr. Hashima N Hasan STSCI USA (301)3384519 ------------------------------------------------------------------------------------ 7. Abstract THIS IS A CONTINGENCY PROPOSAL. It will only be used in Cycle 1 if a full map of the SAA is desired and parallel science observations are available. High energy particles trapped in the radiation belts, primarily the South Atlantic Anomaly (SAA) will raise background levels and degrade science data quality. The ground system has the capability to predict entry and exit from the region in order to schedule science observations appropriately. The goals of this test are to measure the flux levels through the SAA with the HSP, to monitor fluctuations in the SAA on timescales of several days, and to identify any other regions of high particle fluxes in the HST orbit. These data will be used to verify the general structure of existing empirical models from which the boundaries used by the ground system will originate, to relate HSP count rates to the particle fluxes, and to scale fluctuations in the fluxes with respect to the HSP. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 0 par: 14.78 10. Num targs pri: 0 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: HSP ------------------------------------------------------------------------------------ 12. Special sched req: Time Critical obs. ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 2829c PI: Dr. Hashima N Hasan Proposal Title: RADIATION MONITORING OLT ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 2. Scientific Justification. THIS IS A CYCLE 1 CONTINGENCY PROPOSAL. The goals of this test are to measure the flux levels through the SAA and record fluctuations in the field on timescales of several days using the HSP. These data will be used to verify the general structure of existing models, to sc ale fluctuations, and to relate HSP background levels to the particle fluxes. The contours describing the SAA boundaries are needed by the ground system, which has the capability to assign a unique contour for each SI. The strength of the particle fluxes through the SAA is a function of planar position and altitude. The HSP will be used to monitor the background levels over multiple successive orbits on a single day. Mean HSP background levels will be related to models of the particle flux and the overall structure of the SAA verified. Fluctuations as a function of time about the mean values will be studied in order to scale the background levels measured by the other SIs during the OV/SV period. ------------------------------------------------------------------------------------ 3. Description of proposed observations. Test Procedure: 1) Select the HSP/PHOT configuration, 2IDT Mode (VIS and UV1), filters F355M-VIS, F240W-UV1, byte format, SAMPLE-TIME=10sec, target DARK. SPECIAL REQUIREMENTS: Sequence NON-INT 2) First orbit: NUM EXP=9, EXP TIME=10 MIN; Observation must NOT impinge on SAA. 3) Orbits 2 through 9: NUM EXP=72, TIME=10MIN; Orbit #2 must begin prior to SAA entry and continue through the SAA so that remaining 6 orbits occur within the SAA. 4) Last orbit: NUM EXP=9, EXP TIME=10MIN; last orbit to occur after exit from the SAA to look for enduring detector effects. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. Submitted as an Observatory Level Test. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. - The requirement for NON-INTERRUPTED observations spanning 9 orbits may be relaxed ONLY if absolutely necessary AND for very few and short periods during the orbit which lies OUTSIDE of the SAA. - The first orbit of the 9 to be scheduled outside SAA. - The second orbit must include the initial entry into the SAA. ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. The scientific goals of this test is to measure flux levels throughout the HST orbit: through the SAA in particular and in addition to identify any other regions of high particle flux. The strength of the particle fluxes through the SAA is a function of planar location and altitude. Therefore, continuous and un- interrupted observations are required to satisfy these goals. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. The data reduction and analysis will include the following: - to bin HSP data if necessary and associate count rate with latitude, longitude, and altitude (extracted from OMS). - to determine mean HSP count rates as a function of position over time and relate the HSP count rates to the mean fluxes predicted by the model (linear relation may be adequate). - to determine the amplitude and character of fluctuations. Page 3 ------------------------------------------------------------------------------------ 11. Address Information Name: HASHIMA HASAN Category: PI Institution: ST SCI Address: 3700 SAN MARTIN DRIVE City: BALTIMORE State: MD Zip Code: 21218 Country: USA Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ Name: HASHIMA N HASAN Category: PI Institution: ST SCI Address: 3700 SAN MARTIN DR City: BATIMORE State: MD Zip Code: 21218 Country: USA Telephone: Telex (or e-mail): ------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 2829c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 1 DARK HSP/ STAR- 1.0 F355M SAMPLE- 9 10M 1 NON-INT VIS/ SKY TIME=10.0 UV1 SKY- FILTER=F240W DATA- FORMAT=BYTE Comments: OBSERVATION MUST NOT IMPINGE ON DELAY-TIME=0 SAA BOUNDARY AT ANY TIME. SKY-APER=DARK ------------------------------------------------------------------------------------------------------------------------------------ 2 ^ ^ ^ ^ ^ ^ ^ 72 ^ 1 ^ ^ ^ ^ Comments: INTENT IS TO TAKE DARKS OVER THE ENTIRE 7 ORBITS WHICH PASS THROUGH THE SAA. THE FIRST OF THE SEVEN ORBITS MUST BEGIN PRIOR TO SAA PENETRATION AND CONTINUE INTO THE SAA. ------------------------------------------------------------------------------------------------------------------------------------ 3 ^ ^ ^ ^ ^ ^ ^ 9 ^ 1 Comments: OBSERVATION MUST OCCUR OUTSIDE SAA. ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 2829c [ 5] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations HSP/VIS/UV1 ^ ------------------------------------------------------------------------------------------------------------------------------------ Opmodes STAR-SKY ^ ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SAMPLE-TIME=10.0 SKY-FILTER=F240W DATA-FORMAT=BYTE DELAY-TIME=0 SKY-APER=DARK ------------------------------------------------------------------------------------------------------------------------------------ Proposal for CAL/OTA ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements NON-INT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F355M ^ ------------------------------------------------------------------------------------------------------------------------------------ Target Names ------------------------------------------------------------------------------------------------------------------------------------