ISOCAM Interactive Analysis User's Manual Version 5.0 - ISO - ESA

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26 CHAPTER 3. RASTER OBSERVATION (CAM01) CIA> help, raster_pds, /str ** Structure , 54 tags, length=1399800, refs=1: RASTERCOL INT 4 RASTERLINE INT 2 M_STEPCOL FLOAT 84.0000 N_STEPLINE FLOAT 84.0000 RA_RASTER DOUBLE 180.47414 DEC_RASTER DOUBLE -18.878420 ANGLE_RASTER DOUBLE 109.43000 RASTER_ROTATION DOUBLE 199.43000 RASTER_ORIENTATION STRING = ’SPACECRAFT Y_AXIS’ ASTR STRUCT -> ASTR_STRUC Array[1] NX_RASTER INT 116 NY_RASTER INT 60 RASTER FLOAT Array[116, 60] etc... 5. Now it is time to do some actual calibration. However, before we proceed let’s take a look at some of the effects we want to eliminate from our data. At the moment the most substantial portion of our data is held in a raster pds.cube. This is a cube of raw CAM IMAGEs taken from all the SCDs of the first clean SSCD. We will use x3d to take a look at this cube of IMAGEs – see Figure 3.1. CIA> x3d, raster_pds Cube(1,9,106) = 134.000 x3d is a tool for browsing through the frames of a cube – in our case the frames are CAM IMAGEs. One IMAGE is displayed at a time. The slider bar to the right of the displayed IMAGE can be used to flick through the cube. A plot above the IMAGE displays the value of a selected pixel (selection can be done by right-clicking on the IMAGE) throughout the cube. In effect, this is the history of that pixel during the entire CONFIGURATION. Upon calling, x3d displays the center frame of the cube, i.e. raster pds.cube[ *, *, 106]. The are several effects evident in this IMAGE. Dark current causes the alternately dark and bright horizontal lines. The bright pixels at the bottom left of the IMAGE is a cosmic ray glitch – this is clear from the sharp spike in the history of the currently selected pixel, raster pds.cube[1, 9, 106]. Additional effects which are not obvious in Figure 3.1 are: (i) pixel to pixel non-unformity which need to be corrected by flat-fielding, (ii) instability in the detector which can be corrected by a variety of fitting and masking routines. We will now attempt to remove all these effects. There is a set of CIA calibration routines that we will use to do all the necessary data calibration and correction – Chapter 20 contains more detail on these routines. Almost all of these routines accept any flavour of PDS, the one exception is the raster MOSAIC creation routine. This is of course specific to a raster PDS. All these routines have a choice of different methods, though for simplicity we will just use the default here. Now we will perform the following corrections: (i) dark correction, (ii) deglitching, (iii) stabilization.
3.2. DATA ANALYSIS 27 Figure 3.1: A raster IMAGE before calibration. Dark current causes the alternately dark and bright horizontal lines. The bright pixels at the bottom left of the IMAGE are due to a glitch – this is clear from the sharp spike in the history of the currently selected pixel, raster pds.cube[1, 9, 106]. (Displayedbyx3d.)
Page 1 and 2: ISOCAM Interactive Analysis User’
Page 3: Michael Rupen (NRAO) Jaqui Sam Lone
Page 6 and 7: vi CONTENTS 8 Polarization observat
Page 8 and 9: viii CONTENTS 14.4.6 x3d as a calib
Page 10 and 11: x CONTENTS 19.3 A beam-switch obser
Page 12 and 13: xii CONTENTS B CIA command short-li
Page 14 and 15: xiv CONTENTS
Page 16 and 17: xvi LIST OF FIGURES 14.13The raster
Page 18 and 19: xviii LIST OF FIGURES
Page 20 and 21: xx LIST OF TABLES
Page 22 and 23: 2 CHAPTER 1. ABOUT THE CIA USER’S
Page 24 and 25: 4 CHAPTER 2. ABOUT CIA 2.2 System r
Page 26 and 27: 6 CHAPTER 2. ABOUT CIA Figure 2.2:
Page 28 and 29: 8 CHAPTER 2. ABOUT CIA In addition,
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Page 32 and 33: 12 CHAPTER 2. ABOUT CIA LOG Log fil
Page 34 and 35: 14 CHAPTER 2. ABOUT CIA This will p
Page 36 and 37: 16 CHAPTER 2. ABOUT CIA % device, p
Page 38 and 39: 18 CHAPTER 2. ABOUT CIA
Page 41: Introduction The Quick Start Guide
Page 44 and 45: 24 CHAPTER 3. RASTER OBSERVATION (C
Page 52 and 53: 32 CHAPTER 4. STARING OBSERVATION (
Page 54 and 55: 34 CHAPTER 4. STARING OBSERVATION (
Page 56 and 57: 36 CHAPTER 5. SOLAR SYSTEM OBJECT O
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Page 72 and 73: 52 CHAPTER 8. POLARIZATION OBSERVAT
Page 79: Introduction The purpose of Part II
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76 CHAPTER 11. INTRODUCTION TO CIA
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78 CHAPTER 12. DATA SLICING 3. At t
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80 CHAPTER 12. DATA SLICING CIA> ns
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82 CHAPTER 12. DATA SLICING equal t
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84 CHAPTER 12. DATA SLICING OR CIA>
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86 CHAPTER 12. DATA SLICING 70 16.0
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88 CHAPTER 12. DATA SLICING • Sel
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90 CHAPTER 12. DATA SLICING We sugg
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92 CHAPTER 12. DATA SLICING title d
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94 CHAPTER 12. DATA SLICING • Sel
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96 CHAPTER 13. DATA CALIBRATION 13.
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98 CHAPTER 13. DATA CALIBRATION •
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100 CHAPTER 13. DATA CALIBRATION 13
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104 CHAPTER 13. DATA CALIBRATION Fi
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106 CHAPTER 13. DATA CALIBRATION au
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108 CHAPTER 13. DATA CALIBRATION 2.
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114 CHAPTER 14. IMAGE ANALYSIS AND
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Introduction The purpose of this pa
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Chapter 15 CIA data structure high-
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15.2. OBSERVATION DATA STRUCTURES 1
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15.3. CALIBRATION DATA STRUCTURE (C
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15.4. AUXILIARY CALIBRATION DATA 17
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15.4. AUXILIARY CALIBRATION DATA 17
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15.5. PREPARED DATA STRUCTURE (PDS)
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Chapter 16 Data structure manipulat
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16.1. CIA DATA STRUCTURE INTERFACE
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16.1. CIA DATA STRUCTURE INTERFACE
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16.2. AN EXAMPLE OF SAD MANIPULATIO
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16.4. MANIPULATING THE MASK 195 and
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16.5. CDS DATA EXTRACTION 197 16.5
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16.6. MANIPULATING CIA DATA STRUCTU
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Chapter 17 Importing ISO data produ
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17.2. IMPORTING FITS TO REGULAR IDL
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Chapter 18 Export of CIA data struc
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18.3. EXPORT FOR ARCHIVING 207 CIA>
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Part IV Advanced Use of CIA 209
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212
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214 CHAPTER 19. ADVANCED SLICING 19
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274 CHAPTER 21. USING SLICE WITHIN
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294 CHAPTER 22. SECOND ORDER CORREC
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296 CHAPTER 22. SECOND ORDER CORREC
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298 CHAPTER 23. X CIA REFERENCE GUI
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306 APPENDIX A. GLOSSARY beam-switc
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308 APPENDIX A. GLOSSARY FITS (data
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310 APPENDIX A. GLOSSARY raster dat
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312 APPENDIX A. GLOSSARY
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314 APPENDIX B. CIA COMMAND SHORT-L
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320 APPENDIX C. THE ISO CD-ROM C.2.
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322 APPENDIX C. THE ISO CD-ROM Vari
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324 APPENDIX D. GUIDELINES FOR WRIT
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326 APPENDIX D. GUIDELINES FOR WRIT
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328 APPENDIX E. ISOCAM ASTROMETRY:
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338 APPENDIX F. WHAT IS NEW IN CIA
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344 APPENDIX G. WARNING MESSAGES IN
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346 APPENDIX H. PATCHED ASTROLIB AN
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348 APPENDIX I. UPGRADING OLD CIA S
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350 APPENDIX I. UPGRADING OLD CIA S
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352 APPENDIX J. REPORTING PROBLEMS
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354 APPENDIX K. TECHNICAL REPORTS S
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356 BIBLIOGRAPHY Okumura K., 1998,
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