! Proposal 5824, submission 4
! PI: Dr. Amanda S. Bosh
! Received Wed Oct 18 16:49:56 EDT 1995
! From: storrs@stsci.edu
! Proposal 5824, submission 2
! PI: Dr. Amanda S. Bosh
! Received Thu Oct 5 09:43:59 EDT 1995
! From: storrs@stsci.edu
! Proposal 5824, submission 1
! PI: Dr. Amanda S. Bosh
! Received Wed Feb 15 17:56:59 EST 1995
! From: amanda@lowell.edu
! file: %M%
! SCCSid: %Z%%M% %I% %G%
! Hubble Space Telescope Cycle 5 (1995) Phase II Proposal Template
! $Id: 5824,v 22.1 1995/12/08 15:01:19 pepsa Exp $
!
! Refer to the HST Phase II Proposal Instructions to fill this out
!
! Anything after a "!" is ignored, and may be deleted
!
! All keywords with multiple entries are comma delimited except the
! Visit_Requirements and Special_Requirements keywords which can be
! delimited with carriage returns or semi-colons, but not commas
!
! For help call your Program Coordinator: Andy Lubenow
! Phone: 410 338-4928 , E-mail: lubenow@stsci.edu
!
! This partially completed template was generated from a Phase I proposal.
! Name of Phase I Proposal: bosh-714.prop
! Date generated: Fri Dec 16 14:11:14 EST 1994
!
Proposal_Information ! Section 4
Title: Occultation of GSC5249-01240 by Saturn:
Atmospheric and Ring Studies
Proposal_Category: GO
Scientific_Category: Solar System
Cycle: 5
Investigators
PI_name: Dr. Amanda S. Bosh
PI_Institution: Lowell Observatory
CoI_Name: Prof. James L. Elliot
CoI_Institution: Massachusetts Institute of Technology
Contact: N ! Y or N (designate at most one contact)
Abstract: ! Free format text (please update)
On 1995 November 20-21, Saturn and its rings will occult
GSC5249-01240 while Saturn is near its stationary point. This
will result in probes of the atmosphere at multiple latitudes
and of the rings at several longitudes. We propose to observe
this event to (i) establish Saturn's atmospheric structure in
the 1-100 microbar region (inaccessible to Voyager instruments),
(ii) determine the extent of latitudinal homogeneity in
composition and temperature present near north latitudes 35-75
degrees, and (iii) probe the ring system for features of low
optical depth (with spatial resolution better than 1 km) by
taking advantage of the low opening angle of the rings as we
approach ring-plane crossing in 1995.
Questions ! Free format text (please update)
Observing_Description:
(1) More than 12 hours before or after the occultation
observations, obtain spectrum of star with the G650L/BL
element (to be used during the occultation observations).
This determines the spectrum of the star for later use in
data analysis. (2) One orbit before, or in same orbit as the
start of the occultation observations, acquire an "offset-
acquisition" star: one that is within 1.5 arcmin of the star
to be occulted but further from Saturn and its rings than the
target star. This offset acquisition technique has been
successfully implemented before (GTO/HSP1081, and others) to avoid
problems with target acquisition in the bright scattered
light background near Saturn. A suitable offset acquisition
candidate will be chosen after ground-based astrometric
frames are obtained and analyzed. (3) Blind offset to
GSC5249-01240. Prior astrometry will have determined the
relative positions of these two stars to better than 0.1
arcsec, assuring accurate placement of the target star in the
science aperture. (4) Track on GSC5249-01240 while Saturn's
atmosphere passes in front of it (7-8 orbits). There will be
one atmosphere observation per orbit, each lasting about 15
minutes. (5) Approximately 10 orbits between the time the
star exits the atmosphere and it enters the rings. During
this time, can obtain spectra of Saturn's atmosphere (near
occultation latitudes) and rings. This can also be done
after ring egress or before ingress of the atmosphere portion
of the occultation. These observations establish the spectra
of Saturn's atmosphere and rings separately, without any
stellar component. These will be used in later analyses.
(6) One orbit before, or in the same orbit as the start of the ring
occultation observations, acquire offset-acq star. (7) Blind
offset to GSC5249-01240. (8) Track on GSC5249-01240 while
Saturn's rings pass in front of it (4-5 orbits). There will be
one ring observation per orbit, each lasting as long as
possible (<2*18 minutes, utilizing both tape recorders at the
risk of losing data). (9) If atmospheric and ring spectra
were not previously obtained, get them now. The quantity of
data obtained in this set of observations may pose a problem.
If possible, the tape recorder(s) should be downloaded during
the earth-occultation portion of each orbit. If this is not
possible, we will need to sacrifice some orbits to relay the
previously obtained data. This will reduce the total number
of orbits used for this proposal. This will reduce the
latitudinal coverage of the atmosphere occultation, and the
multiple passes through the rings. While it is not
desirable, and the scientific return goes down in direct
proportion to the number of lost orbits, we will retain
adequate coverage due to the nature of the stellar path.
Cycle 5: Primary Orbits: 16 Exposures: 27
Real_Time_Justification:
Time-critical: stellar occultations by solar system bodies
are inherently time-critical observations. They occur at a
particular time, determined by the planetary ephemeris and
star position; therefore, no other dates/times are
acceptable. In addition, this particular event is truly rare
and time-critical because it occurs near Saturn's stationary
point (the point when the Earth's motion and Saturn's motion,
projected onto the sky plane, are almost equal and opposite,
making Saturn appear to be stationary). It is very unusual
for a planet to occult a star near a stationary point
(statistically, because it is a relatively small area of
sky), but these are the most useful observations because the
planet is moving slowly, allowing us to increase our S/N and
spatial resolution.
We plan to apply for observing time at a ground-based station
(such as the Infrared Telescope Facility at Mauna Kea,
Hawaii). While the S/N and resolution from such a site will
be greatly inferior to that from the HST, additional
observations will aid in constraining the geometry of the
event (determining the ephemeris offsets f_0, g_0 are a
crucial part of the analysis), and may also provide
additional data points for studying ringlet kinematics. We
will also provide ground-based astrometry prior to the event.
With this astrometry we will locate an offset acquisition
target and determine its position relative to GSC5249-01240
with an accuracy of better than 0.1 arcsec. We will also use
this astrometry to refine the predicted times of feature
events.
Calibration_Justification: ! Move appropriate text from Real_Time_Justification
Additional_Comments:
Fixed_Targets ! Section 5.1
Target_Number: 1
Target_Name: GSC5249-01240
Alternate_Names:
Description: STAR
Position: RA=23H 19M 34.5755S +/- 0.003S,
DEC=-6D 47' 10.042" +/- 0.05",
! PLATE-ID=0000
Equinox: J2000
RV_or_Z:
RA_PM: ! Units are seconds of time per year
Dec_PM: ! Units are seconds of arc per year
Epoch:
Annual_Parallax:
Flux: V=11.6 +/- 0.5 ! Include at least V and B-V
Comments:
! Target_Number: 2
! Target_Name: 01240-OFFSET
!Alternate_Names: GSC5249-00969
! Description: STAR
! Position: RA=23H 19M 36.6186S +/- 0.003S,
! DEC=-6D 47' 44.884" +/- 0.05",
! ! PLATE-ID=0000
! Equinox: J2000
! RV_or_Z:
! RA_PM: ! Units are seconds of time per year
! Dec_PM: ! Units are seconds of arc per year
! Epoch:
!Annual_Parallax:
! Flux: V=14.4 +/- 1.0 ! Include at least V and B-V
! Comments:
Solar_System_Targets ! Section 5.2
Target_Number: 3
Target_Name: SATURN-ATMOS1
Description: OTHER, LIMB OF SATURN
Level_1: STD = SATURN ! Satellite of Sun
Level_2: TYPE = POS_ANGLE, ! Satellite of Level_1
RAD = 8.36,
ANG = 349.14,
REF = NORTH
Level_3: ! Satellite of Level_2
Window:
Flux: SURF(V) = 6.7 +/- 0.5 ! Include at least V and B-V
Comments: Saturn's atmosphere along apparent path of occulted star,
immersion section.
Target_Number: 4
Target_Name: SATURN-ATMOS2
Description: OTHER, LIMB OF SATURN
Level_1: STD = SATURN ! Satellite of Sun
Level_2: TYPE = POS_ANGLE, ! Satellite of Level_1
RAD = 9.14,
ANG = 80.94,
REF = NORTH
Level_3: ! Satellite of Level_2
Window:
Flux: SURF(V) = 6.7 +/- 0.5 ! Include at least V and B-V
Comments: Saturn's atmosphere along apparent path of occulted star,
emersion section.
Target_Number: 5
Target_Name: SATURN-RING
Description: RING SATURN
Level_1: STD = SATURN ! Satellite of Sun
Level_2: TYPE = POS_ANGLE, ! Satellite of Level_1
RAD = 11.11,
ANG = 94.65,
REF = NORTH
Level_3: ! Satellite of Level_2
Window:
Flux: SURF(V) = 10.0 +/- 0.5 ! Include at least V and B-V
Comments: Saturn's rings along apparent path of occulted star.
Saturn's ring will be much fainter than usual because
of the sun crossing through the ring plane.
Target_Number: 6
Target_Name: TETHYS
Description: SATELLITE TETHYS
Level_1: STD = SATURN ! Satellite of Sun
Level_2: STD = TETHYS ! Satellite of Level_1
Level_3: ! Satellite of Level_2
Window:
Flux: V = 10.2 +/- 0.5 ! Include at least V and B-V
Comments: Rhea, offset acq for SATURN-ATMOS1 and SATURN-ATMOS2.
Target_Number: 20
Target_Name: SATURN-EAST-ANSA
Description: RING SATURN
Level_1: STD = SATURN ! Satellite of Sun
Level_2: TYPE = TORUS, ! Satellite of Level_1
LONG = 270,
LAT = 0,
RAD = 1.37E05,
POLE_LAT = +90
Window:
Flux: SURF(V) = 15.0 ! Include at least V and B-V
B-V = 0.65
Comments: Eastern ansa of Saturn rings centered on outer
edge of the A ring.
Flux is edge-on ring brightness per LINEAR arcsecond.
Target_Number: 30
Target_Name: SATURN-WEST-ANSA
Description: RING SATURN
Level_1: STD = SATURN ! Satellite of Sun
Level_2: TYPE = TORUS, ! Satellite of Level_1
LONG = 90,
LAT = 0,
RAD = 1.37E05,
POLE_LAT = +90
Window:
Flux: SURF(V) = 15.0 ! Include at least V and B-V
B-V = 0.65
Comments: Western ansa of Saturn rings centered on outer
edge of the A ring.
Flux is edge-on brightness per LINEAR arcsecond.
Generic_Targets ! Section 5.3
Scan_Data ! Appendix B
Scan_Number: 1
FGS_Scan:
Cont_or_Dwell: C
Dwell_Points:
Dwell_Secs:
Scan_Width: 0.0
Scan_Length: 3.0
Sides_Angle: 90.0
Number_Lines: 1
Scan_Rate: 0.075
First_Line_PA: 114.5
Scan_Frame: CEL
Length_Offset: 1.5
Width_Offset: 0.0
Scan_Number: 2
FGS_Scan:
Cont_or_Dwell: C
Dwell_Points:
Dwell_Secs:
Scan_Width: 1.0
Scan_Length: 3.0
Sides_Angle: 90.0
Number_Lines: 3
Scan_Rate: 0.075
First_Line_PA: 114.5
Scan_Frame: CEL
Length_Offset: 1.5
Width_Offset: 0.5
Scan_Number: 3
FGS_Scan:
Cont_or_Dwell: C
Dwell_Points:
Dwell_Secs:
Scan_Width: 0.0
Scan_Length: 3.0
Sides_Angle: 90.0
Number_Lines: 1
Scan_Rate: 0.075
First_Line_PA: 90.0
Scan_Frame: CEL
Length_Offset: 1.5
Width_Offset: 0.0
Scan_Number: 4
FGS_Scan:
Cont_or_Dwell: C
Dwell_Points:
Dwell_Secs:
Scan_Width: 1.0
Scan_Length: 3.0
Sides_Angle: 90.0
Number_Lines: 3
Scan_Rate: 0.075
First_Line_PA: 90.0
Scan_Frame: CEL
Length_Offset: 1.5
Width_Offset: 0.5
Scan_Number: 5
FGS_Scan:
Cont_or_Dwell: C
Dwell_Points:
Dwell_Secs:
Scan_Width: 0.0
Scan_Length: 3.0
Sides_Angle: 90.0
Number_Lines: 1
Scan_Rate: 0.075
First_Line_PA: 147.5
Scan_Frame: CEL
Length_Offset: 1.5
Width_Offset: 0.0
Scan_Number: 6
FGS_Scan:
Cont_or_Dwell: C
Dwell_Points:
Dwell_Secs:
Scan_Width: 0.5
Scan_Length: 3.0
Sides_Angle: 90.0
Number_Lines: 3
Scan_Rate: 0.075
First_Line_PA: 147.5
Scan_Frame: CEL
Length_Offset: 1.5
Width_Offset: 0.25
Visits ! Section 6
Visit_Number: 1
Visit_Requirements: PCS MODE Fine
BETWEEN 13-NOV-95:00:00:00 and 19-NOV-95:00:00:00
On_Hold_Comments:
Visit_Comments: ATMOS-OCC. Fine lock if possible; if not, coarse track
is acceptable. Timing of this visit may change in response
to updated astrometry and revised occultation prediction.
Exposure_Number: 10 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: ACQ/PEAK
Aperture: 4.3
Sp_Element: G400H
Wavelength:
Optional_Parameters:SEARCH-SIZE-X=1,
SEARCH-SIZE-Y=3,
SCAN-STEP-Y=1.23
Number_of_Iterations: 1
Time_Per_Exposure: 1S
Special_Requirements: ONBOARD ACQ FOR 20 ! Section 7.2
Comments:
Exposure_Number: 20 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: ACQ/PEAK
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters:SEARCH-SIZE-X=6,
SEARCH-SIZE-Y=2,
SCAN-STEP-X=0.61,
SCAN-STEP-Y=0.61
Number_of_Iterations: 1
Time_Per_Exposure: 1S
Special_Requirements: ONBOARD ACQ FOR 30 ! Section 7.2
Comments:
Exposure_Number: 30 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: ACQ/PEAK
Aperture: 0.3
Sp_Element: G400H
Wavelength:
Optional_Parameters:SEARCH-SIZE-X=5,
SEARCH-SIZE-Y=5,
SCAN-STEP-X=0.17,
SCAN-STEP-Y=0.17
Number_of_Iterations: 1
Time_Per_Exposure: 1S
Special_Requirements: ONBOARD ACQ FOR 40 ! Section 7.2
Comments:
Exposure_Number: 40 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: ACQ/PEAK
Aperture: 0.3
Sp_Element: G400H
Wavelength:
Optional_Parameters:SEARCH-SIZE-X=5,
SEARCH-SIZE-Y=5,
SCAN-STEP-X=0.052,
SCAN-STEP-Y=0.052
Number_of_Iterations: 1
Time_Per_Exposure: 1S
Special_Requirements: ONBOARD ACQ FOR 420-450
Comments:
SAVE OFFSET RPC-1
Exposure_Number: 420 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 120.54S
Special_Requirements:
Comments: Get spectrum of occulted star when it is away from
Saturn. Same parameters as occultation.
Exposure_Number: 430 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 4.0
Number_of_Iterations: 1
Time_Per_Exposure: 120S
Special_Requirements: ! Section 7.2
Comments: Get spectrum of occulted star when it is away from
Saturn. Parameters set to optimize signal,
calibration ability. Standard RAPID mode parameters.
Exposure_Number: 440 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G650L
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 120.54S
Special_Requirements:
Comments: Get spectrum of occulted star when it is away from
Saturn. Same parameters as occultation.
Exposure_Number: 450 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G650L
Wavelength:
Optional_Parameters: READ-TIME = 4.0
Number_of_Iterations: 1
Time_Per_Exposure: 120S
Special_Requirements: ! Section 7.2
Comments: Get spectrum of occulted star when it is away from
Saturn. Parameters set to optimize signal,
calibration ability. Standard RAPID mode parameters.
Visit_Number: 2
Visit_Requirements: PCS MODE Fine
BETWEEN 20-NOV-95:00:00:00 and 20-NOV-95:01:00:00
On_Hold_Comments:
Visit_Comments: ATMOS-OCC. Fine lock if possible; if not, coarse track
is acceptable. Timing of this visit may change in response
to updated astrometry and revised occultation prediction.
! ORBIT 9 DATA to TAPE
Exposure_Number: 90 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25 ! = LT, no DT or ROT. This is for
! 1 step pos. in the patter, bec.
! SUB-STEP = 1 and COMB = NO. This
! applies to all occultation exposures.
Number_of_Iterations: 1
Time_Per_Exposure: 18m
Special_Requirements:
Comments: IGNORE SAA. Can split exposure across SAA. The
SEQ NON-INT can be removed. GROUP 30-90 NO GAP.
USE OFFSET RPC-1
! Done on Gyros, use MUG flag
Exposure_Number: 95 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25 ! = LT, no DT or ROT. This is for
! 1 step pos. in the patter, bec.
! SUB-STEP = 1 and COMB = NO. This
! applies to all occultation exposures.
Number_of_Iterations: 1
Time_Per_Exposure: 18m ! May need to shorten this
Special_Requirements: END ORBIT
Comments: IGNORE SAA. Can split exposure across SAA. The
SEQ NON-INT can be removed. GROUP 30-90 NO GAP.
USE OFFSET RPC-1
! ORBIT 10 DATA via REAL TIME CONTACT
Exposure_Number: 100 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 23.25m
Special_Requirements: RT ANALYSIS
END ORBIT
Comments: IGNORE SAA. Can split exposure across SAA.
USE OFFSET RPC-1
! ORBIT 11 DATA via REAL TIME CONTACT
Exposure_Number: 110 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 29m
Special_Requirements: RT ANALYSIS
END ORBIT
Comments: IGNORE SAA. Can split exposure across SAA.
USE OFFSET RPC-1
Visit_Number: 3
Visit_Requirements: PCS MODE Fine
BETWEEN 20-NOV-95:18:00 AND 20-NOV-95:19:00
On_Hold_Comments:
Visit_Comments: ATM & RING-OCC. Fine lock if possible; if not, coarse
track is acceptable. Timing of this visit may change in
response to updated astrometry and revised occultation
prediction.
! ORBIT 22 DATA to TAPE
Exposure_Number: 220 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 8.5m
Special_Requirements:
Comments: IGNORE SAA. Can split exposure across SAA.
USE OFFSET RPC-1
! Done on Gyros, use MUG flag
Exposure_Number: 225 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 18m
Special_Requirements: END ORBIT
Comments: IGNORE SAA. Can split exposure across SAA.
USE OFFSET RPC-1
! ORBIT 23 DATA to TAPE
Exposure_Number: 230 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 8m
Special_Requirements: END ORBIT
Comments: IGNORE SAA. Can split exposure across SAA.
USE OFFSET RPC-1
! Done on Gyros, use MUG flag
Exposure_Number: 235 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 18m
Special_Requirements: END ORBIT
Comments: IGNORE SAA. Can split exposure across SAA.
USE OFFSET RPC-1
! ORBIT 24 DATA to TAPE
Exposure_Number: 240 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 18m
Special_Requirements:
END ORBIT
Comments: IGNORE SAA. Can split exposure across SAA.
USE OFFSET RPC-1
! ORBIT 25 DATA to tape
Exposure_Number: 250 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 18m
Special_Requirements:
END ORBIT
Comments: IGNORE SAA. Can split exposure across SAA.
USE OFFSET RPC-1
! ORBIT 26 DATA via REAL TIME CONTACT
Exposure_Number: 260 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G650L
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 21.25m
Special_Requirements: RT ANALYSIS
END ORBIT
Comments: IGNORE SAA. Can split exposure across SAA.
USE OFFSET RPC-1
! Done on Gyros, use MUG flag
Exposure_Number: 265 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G650L
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 12m
Special_Requirements:
END ORBIT
Comments: IGNORE SAA. Can split exposure across SAA.
USE OFFSET RPC-1
! ORBIT 27 DATA via REAL TIME CONTACT
Exposure_Number: 270 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G650L
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 37.25m
Special_Requirements: RT ANALYSIS
NO SPLIT
END ORBIT
Comments: IGNORE SAA. Can split exposure across SAA.
USE OFFSET RPC-1
! ORBIT 28 DATA to TAPE Shared with Nicholson, 5836
Exposure_Number: 280 ! Section 6.5
Target_Name: GSC5249-01240
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G650L
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 13.5m
Special_Requirements:
Comments: IGNORE SAA. Can split exposure across SAA.
USE OFFSET RPC-1
! Beginning of Nicholson's exposures
Exposure_Number: 301 ! Section 6.5
Target_Name: SATURN-EAST-ANSA
Config: WFPC2
Opmode: IMAGE
Aperture: PC1-FIX ! Section 9
Sp_Element: FQCH4P15 ! Section 9
Wavelength: 8922
Optional_Parameters: CR-SPLIT=no ! Section 9
Number_of_Iterations: 1
Time_Per_Exposure: 180 S
Special_Requirements: ! Section 7.2
POS TARG -0.3, -0.2 ! Section 9
NO SPLIT
SEQ 301-302 NON-INT
Comments: PC image of shadows on rings (east ansa)
Exposure_Number: 302 ! Section 6.5
Target_Name: SATURN-WEST-ANSA
Config: WFPC2
Opmode: IMAGE
Aperture: PC1-FIX ! Section 9
Sp_Element: FQCH4P15 ! Section 9
Wavelength: 8922
Optional_Parameters: CR-SPLIT=no ! Section 9
Number_of_Iterations: 1
Time_Per_Exposure: 180 S
Special_Requirements: ! Section 7.2
POS TARG -1.7, -7.8 ! Section 9
NO SPLIT
Comments: PC image of shadows on rings (west ansa)
! -------------------------------------------------------------------
! End of Nicholson's exposures
Visit_Number: 4
Visit_Requirements: PCS MODE Fine
On_Hold_Comments:
Visit_Comments: BACK-SCANS. Fine lock if possible; if not, coarse track
is acceptable.
Exposure_Number: 300 ! Section 6.5
Target_Name: TETHYS
Config: FOS/RD
Opmode: ACQ/PEAK
Aperture: 4.3
Sp_Element: G400H
Wavelength:
Optional_Parameters: SCAN-STEP-Y = 1.23,
SEARCH-SIZE-X = 1,
SEARCH-SIZE-Y = 3
Number_of_Iterations: 1
Time_Per_Exposure: 1S
Special_Requirements: ONBOARD ACQ FOR 310
Comments:
Exposure_Number: 310 ! Section 6.5
Target_Name: TETHYS
Config: FOS/RD
Opmode: ACQ/PEAK
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: SCAN-STEP-X = 0.61,
SCAN-STEP-Y = 0.61,
SEARCH-SIZE-X = 6,
SEARCH-SIZE-Y = 2
Number_of_Iterations: 1
Time_Per_Exposure: 1S
Special_Requirements: ONBOARD ACQ FOR 320
Comments:
Exposure_Number: 320 ! Section 6.5
Target_Name: TETHYS
Config: FOS/RD
Opmode: ACQ/PEAK
Aperture: 0.5
Sp_Element: G400H
Wavelength:
Optional_Parameters: SCAN-STEP-X = 0.29,
SCAN-STEP-Y = 0.29,
SEARCH-SIZE-X = 3,
SEARCH-SIZE-Y = 3
Number_of_Iterations: 1
Time_Per_Exposure: 1S
Special_Requirements: ONBOARD ACQ FOR 330-380
Comments: Using Peak acquisition to achieve 0.1 arcsec
pointing accuracy (sequence A+B1+C1 from CAL/FOS-132).
Exposure_Number: 330 ! Section 6.5
Target_Name: SATURN-ATMOS1
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 40.18S
Special_Requirements: SPATIAL SCAN 1 ! Section 7.2
SEQ 330-340 NON-INT
Comments:
Exposure_Number: 340 ! Section 6.5
Target_Name: SATURN-ATMOS1
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 40.18S
Special_Requirements: SPATIAL SCAN 2
Comments:
Exposure_Number: 350 ! Section 6.5
Target_Name: SATURN-ATMOS2
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 40.18S
Special_Requirements: SPATIAL SCAN 3 ! Section 7.2
SEQ 350-360 NON-INT
Comments:
Exposure_Number: 360 ! Section 6.5
Target_Name: SATURN-ATMOS2
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 40.18S
Special_Requirements: SPATIAL SCAN 4
Comments:
Exposure_Number: 370 ! Section 6.5
Target_Name: SATURN-RING
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G650L
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 40.18S
Special_Requirements: SPATIAL SCAN 5 ! Section 7.2
SEQ 370-380 NON-INT
Comments: Warning: this scan occurs very near Saturn's limb,
which is too bright for the G650L disperser used here.
Exposure_Number: 380 ! Section 6.5
Target_Name: SATURN-RING
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G650L
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 40.18S
Special_Requirements: SPATIAL SCAN 6 ! Section 7.2
Comments: Warning: this scan occurs very near Saturn's limb,
which is too bright for the G650L disperser used here.
Visit_Number: 5
Visit_Requirements: PCS MODE Fine
On_Hold_Comments:
Visit_Comments: Additional WFPC images
Exposure_Number: 501 ! Section 6.5
Target_Name: SATURN-EAST-ANSA
Config: WFPC2
Opmode: IMAGE
Aperture: PC1-FIX ! Section 9
Sp_Element: FQCH4P15 ! Section 9
Wavelength: 8922
Optional_Parameters: CR-SPLIT=no ! Section 9
Number_of_Iterations: 2
Time_Per_Exposure: 400 S
Special_Requirements: ! Section 7.2
! POS TARG -0.3, -0.2 ! Section 9
NO SPLIT
! SEQ 301-302 NON-INT
Comments: PC image of shadows on rings (east ansa)
Exposure_Number: 502 ! Section 6.5
Target_Name: SATURN-WEST-ANSA
Config: WFPC2
Opmode: IMAGE
Aperture: PC1-FIX ! Section 9
Sp_Element: FQCH4P15 ! Section 9
Wavelength: 8922
Optional_Parameters: CR-SPLIT=no ! Section 9
Number_of_Iterations: 2
Time_Per_Exposure: 400 S
Special_Requirements: ! Section 7.2
POS TARG -1.7, -7.8 ! Section 9
NO SPLIT
Comments: PC image of shadows on rings (west ansa)
! -------------------------------------------------------------------
! End of additional exposures
Visit_Number: 6
Visit_Requirements: PCS MODE Fine
On_Hold_Comments:
Visit_Comments: BACK-SCANS. Fine lock if possible; if not, coarse track
is acceptable.
Exposure_Number: 300 ! Section 6.5
Target_Name: TETHYS
Config: FOS/RD
Opmode: ACQ/PEAK
Aperture: 4.3
Sp_Element: G400H
Wavelength:
Optional_Parameters: SCAN-STEP-Y = 1.23,
SEARCH-SIZE-X = 1,
SEARCH-SIZE-Y = 3
Number_of_Iterations: 1
Time_Per_Exposure: 1S
Special_Requirements: ONBOARD ACQ FOR 310
Comments:
Exposure_Number: 310 ! Section 6.5
Target_Name: TETHYS
Config: FOS/RD
Opmode: ACQ/PEAK
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: SCAN-STEP-X = 0.61,
SCAN-STEP-Y = 0.61,
SEARCH-SIZE-X = 6,
SEARCH-SIZE-Y = 2
Number_of_Iterations: 1
Time_Per_Exposure: 1S
Special_Requirements: ONBOARD ACQ FOR 320
Comments:
Exposure_Number: 320 ! Section 6.5
Target_Name: TETHYS
Config: FOS/RD
Opmode: ACQ/PEAK
Aperture: 0.5
Sp_Element: G400H
Wavelength:
Optional_Parameters: SCAN-STEP-X = 0.29,
SCAN-STEP-Y = 0.29,
SEARCH-SIZE-X = 3,
SEARCH-SIZE-Y = 3
Number_of_Iterations: 1
Time_Per_Exposure: 1S
Special_Requirements: ONBOARD ACQ FOR 330-380
Comments: Using Peak acquisition to achieve 0.1 arcsec
pointing accuracy (sequence A+B1+C1 from CAL/FOS-132).
Exposure_Number: 330 ! Section 6.5
Target_Name: SATURN-ATMOS1
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 40.18S
Special_Requirements: SPATIAL SCAN 1 ! Section 7.2
SEQ 330-340 NON-INT
Comments:
Exposure_Number: 340 ! Section 6.5
Target_Name: SATURN-ATMOS1
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 40.18S
Special_Requirements: SPATIAL SCAN 2
Comments:
Exposure_Number: 350 ! Section 6.5
Target_Name: SATURN-ATMOS2
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 40.18S
Special_Requirements: SPATIAL SCAN 3 ! Section 7.2
SEQ 350-360 NON-INT
Comments:
Exposure_Number: 360 ! Section 6.5
Target_Name: SATURN-ATMOS2
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G400H
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 40.18S
Special_Requirements: SPATIAL SCAN 4
Comments:
Exposure_Number: 370 ! Section 6.5
Target_Name: SATURN-RING
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G650L
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 40.18S
Special_Requirements: SPATIAL SCAN 5 ! Section 7.2
SEQ 370-380 NON-INT
Comments: Warning: this scan occurs very near Saturn's limb,
which is too bright for the G650L disperser used here.
Exposure_Number: 380 ! Section 6.5
Target_Name: SATURN-RING
Config: FOS/RD
Opmode: RAPID
Aperture: 1.0
Sp_Element: G650L
Wavelength:
Optional_Parameters: READ-TIME = 0.287,
SUB-STEP = 1,
COMB = NO,
STEP-TIME = 0.25
Number_of_Iterations: 1
Time_Per_Exposure: 40.18S
Special_Requirements: SPATIAL SCAN 6 ! Section 7.2
Comments: Warning: this scan occurs very near Saturn's limb,
which is too bright for the G650L disperser used here.
Data_Distribution ! Defaults indicated; change if desired
Medium: 8MM ! 8MM or 6250BPI or 1600BPI
Blocking_Factor: 10 ! 10 or 1
! Only astronomers with very old 9-
! track tape drives should consider
! a blocking factor of 1
Ship_To: PI_Address ! STSCI or PI_Address or <free-text>
! PI Address from Phase I is:
!
! 1400 W. Mars Hill Road,
! Flagstaff, AZ 86001
!
!
Ship_Via: OVERNIGHT ! UPS (2-day) or OVERNIGHT
! Overnight shipping done at PI expense
Recipient_Email: ! Needed if Ship_To: is not PI_Address
! <free-text>