Preface: How to Use this Handbook ix

Handbook Structure x

Handbook Updates xii

Typographic Conventions xii

Chapter 29 FOS Instrument
Overview 29-1

FOS Documentation 29-2

General Outline for Handling FOS Data 29-3

FOS Instrument Basics 29-4

Science Observing Modes 29-20

Target Acquisition 29-22

Chapter 30 FOS Data Structures and
Data Assessment 30-1

Contents of Delivered Data 30-1

Headers, Keywords, and Group Parameters 30-9

FOS Paper Products 30-15

Evaluating Planned Observations 30-24

Assessing FOS Acquisitions 30-26

Assessing FOS Science Observations 30-37

Chapter 31 Calibrating and
Recalibrating FOS Data 31-1

Pipeline Calibration Overview 31-1

Input Files 31-5

CDBS Reference Relations 31-7

Details of the FOS Pipeline Process 31-13

Paired Aperture Calibration Anomaly 31-25

Recalibrating FOS Data: A Checklist 31-26

Post-Calibration Output Files 31-27

User Calibrations 31-29

Chapter 32 FOS Error Sources 32-1

Target Location in Aperture 32-2

Mechanism Stability 32-6

Location of Image on Diode Array 32-7

OTA Effects 32-15

Calibration Accuracies 32-16

Photometric Accuracies 32-17

Flatfield Calibration 32-38

Wavelength Calibration 32-49

Other Data Problems 32-52

PSF/LSF 32-60

Astrometry and Aperture Location 32-62

Timing Accuracies 32-62

Polarimetry 32-64

Chapter 33 FOS Data Analysis 33-1

Calculating Exposure Times 33-1

RAPID Mode Observation Timing Uncertainties 33-5

Heliocentric Radial Velocity Calculation 33-6

FOS/BL G160L Zero-Order Photometric
Calibration 33-7

Converting FOS X,Y to Spacecraft V2,V3 33-8

Other Useful FOS Tasks in STSDAS 33-9

Chapter 34 GHRS Instrument
Overview 34-1

GHRS History 34-2

Instrument Description 34-3

Operating Modes and Data Types 34-11

Documentation and References 34-12

Chapter 35 GHRS Data Structures
and Data Assessment 35-1

Contents of Delivered Data 35-1

Header Keywords 35-8

Paper Products 35-9

Assessing GHRS Data 35-13

Assessing GHRS Acquisitions 35-19

Assessing GHRS Science Data 35-29

RAPID Mode (and a Little About Spatial Scans) 35-34

Chapter 36 Calibrating and
Recalibrating GHRS Data 36-1

Pipeline Calibration Process 36-2

Calibration Steps Explained 36-2

Recalibrating GHRS Data 36-13

Chapter 37 GHRS Error Sources 37-1

About Flux Calibrations 37-2

Spectrum Level and the Sensitivity -Function 37-2

Spectrum Shape 37-16

Spectrum Noise and Structure 37-18

Calibration Quality Files 37-22

About Wavelength Calibrations 37-23

Spatial Uncertainty: Target Acquisition
Problems 37-28

Observation Timing 37-29

Instrument and Spacecraft Errors 37-31

Chapter 38 GHRS Data Analysis 38-1

The Post-COSTAR Point Spread Function 38-1

The GHRS Line Spread Function 38-3

Chapter 39 HSP Instrument
Overview 39-1

HSP Documentation 39-1

Instrument Capabilities and Design 39-2

Chapter 40 HSP Data Structures 40-1

Data Products and File Structures 40-1

HSP Reference Tables 40-5

Displaying HSP Data 40-5

Chapter 41 Calibrating HSP Data 41-1

Pipeline Calibration 41-1

Calibration Switches 41-2

Calibration Algorithms 41-4

HSP Calibration Parameter Tables 41-6

Chapter 42 HSP Error Sources and
Data Analysis 42-1

Uncertainty in EXPSTART and EXPEND 42-1

Disagreement Between PTSRCFLG and SHP 42-2

Correcting Times in PRISM and STAR-SKY
Modes 42-2

Prism Aperture Calibration 42-2

VIS Degradation 42-3

Orbital Period and Ramp 42-4

SDF Clock Errors 42-6

Bogus Data Packets 42-7

Data Echo Problem 42-7

Expected Accuracies of HSP Data 42-8

Further Analysis 42-9

References 42-9

Chapter 43 WF/PC-1 Instrument
Overview 43-1

Historical Overview 43-1

WF/PC-1 Documentation 43-2

WF/PC-1 Instrument Basics 43-3

WF/PC-1 Bibliography 43-7

Chapter 44 WF/PC-1 Data Structures 44-1

Science Data Files 44-1

Reference Files 44-3

Header Keywords 44-3

Chapter 45 Calibrating
WF/PC-1 Data 45-1

Overview of Pipeline Processing 45-1

Calibration of WF/PC-1 Data 45-3

Calibration Details 45-7

Should You Recalibrate? 45-12

Improvements to Calibration Reference Files 45-13

Determining the "Best" Reference Files 45-14

Recalibrating WF/PC-1 Data 45-20

Chapter 46 WF/PC-1 Error Sources
and Data Analysis 46-1

Effect of Decontaminations 46-2

Scattered Light 46-2

Persistent Measles 46-2

Hot Pixels 46-5

Cosmic Rays 46-6

Flatfield Anomalies 46-7

Photometry 46-9

PSFs 46-11

Plate Distortion 46-13

Data Accuracies and Problem Solving 46-13

Appendix E: Internet Resources E-1

Appendix F: Task Example Index F-1

Index IX-1