Fine Guidance Sensor Instrument Handbook for Cycle 14

List of Figures

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Figure 1.1: FGS Interferometric Response (the "S-Curve") 7
Figure 1.2: FGSs in the HST Focal Plane
(Projected onto the Sky) 8
Figure 1.3: FGS Star Selector Geometry 9
Figure 2.1: FGS1r Optical Train Schematic 15
Figure 2.2: Light Path from Koesters Prisms to the PMTs 16
Figure 2.3: The Koesters Prism: Constructive and
Destructive Interference. 18
Figure 2.4: Full Aperture S-Curves of the Original FGSs 22
Figure 2.5: Improved S-Curves for Original FGSs
when Pupil is in Place 23
Figure 2.6: FGS1r S-Curves in Full Aperture Across
the Pickle 24
Figure 2.7: FGS Proposal System and Detector
Coordinate Frames 27
Figure 2.8: FGS1r Filter Transmission 28
Figure 2.9: PMT Efficiency 29
Figure 3.1:  Comparison: PC Observation v. FGS
Observation 34
Figure 3.2:  Simulated PC Observations v. FGS
Observations of a 70mas Binary 35
Figure 3.3: Comparison of FGS1r and FGS3 Transfer
Mode Performance 36
Figure 3.4:  Relative Orbit of the Low-Mass Binary
System Wolf 1062 AB 38
Figure 3.5: Mira-type variable with a resolved
circumstellar disk 39
Figure 3.6: Flare Outburst of Proxima Centauri as
Observed with FGS3 40
Figure 3.7: Triton Occultation of the Star TR180 as
Observed by FGS 3 41
Figure 4.1: Default FESTIME as a Function of V Magnitude for F583W FGS1r: NEA as a Function of Magnitude
and FESTIME 50
Figure 4.2: A Sample Visit Geometry 57
Figure 4.3: .Binary S-Curves Generated from
FGS1r X-Axis Data 59
Figure 4.4:  FGS1r (F583W) S-Curves: Single
and Co-Added 65
Figure 4.5:  Evolution of S-curve morphology along
the FGS1r Y-axis 68
Figure 5.1: Overlay of the pointings used for the
FGS3 OFAD calibration 75
Figure 5.2: Overlay of pointings used for the
FGS1r OFAD calibration 75
Figure 5.3: FGS2 Guide Star Motion at the Onset
of a Day/Night Transition 77
Figure 5.4: Effects of Jitter on an FGS1r S-Curve
(single scan) 81
Figure 5.5: Temporal Stability: FGS3 v. FGS1r 83
Figure 6.1: Example 1: Field of View at Special Orientation 101
Figure 6.2: Example 2: Field of View at Special Orientation 105
Figure 6.3: Example 3: Trans + Pos Mode Visits 107
Figure 6.4: Example 4: Trans + Pos Mode Exposures 109
Figure 7.1:  CALFGSA Common Processing Tasks 119
Figure 7.2: CALFGSA Transfer Mode Processing Tasks 120
Figure 7.3:  CALFGSB Position Mode Processing 121
Figure A.1: Location of IFOV as FGS Acquires a Target 125
 
Figure A.2:  Offset of True Null from S_y= 0 127
 
Figure A.3: X,Y Position in Detector Space of FGS 3's
IFOV During WalkDown to FineLock and Subsequent
Tracking of a Star in FineLock 128
 
Figure B.1: FGS1r S-Curves: Before and After
AMA Adjustment 132
 
Figure B.2:  FGS1r S-Curves: First Six Months
After AMA Adjustment 133
 
Figure B.3:  FGS1r S-Curves: Second Six Months
After AMA Adjustment 133
 
Figure B.4: Optimized FGS1r S-Curves Used
in Angular Resolution Test 134
 
Figure B.5: FGS1r Transfer Function: Change
in Angular Separation of a Binary 135
 
Figure B.6: FGS1r Transfer Function Amplitude
w/ Binary Separation 136
 

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