Space Telescope Science Institute  C.1 Bright Object Mode D.1 Introduction

Appendix D:
Techniques for Dithering, Background Measurement and
Mapping


In this chapter . . .
Introduction
Strategies For Background Subtraction
Chopping and Dithering Patterns
Examples
Types of Motions

NICMOS patterns have been created to enable observers to perform dithering, chopping, and mapping, and these patterns are significantly different than those described in earlier versions of this handbook.


C.1 Bright Object Mode D.1 Introduction
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