Space Telescope Science Institute   7.3 Detector Artifacts  8.1 Introduction

Chapter 8:
Detector Readout Modes


In this chapter . . .
Introduction
Multiple-Accumulate Mode
MULTIACCUM Predefined Sample Sequences (SAMP-SEQ)
Accumulate Mode
Read Times and Dark Current Calibration in ACCUM Mode
Trade-offs Between MULTIACCUM and ACCUM
Acquisition Mode

The NICMOS flight software supports several detector readout modes, which take advantage of the non-destructive read capabilities of the detectors to yield the optimum signal to noise for science observations. These modes are presented in detail in this chapter. In describing these, we introduce the nomenclature used to command each of the modes in the Phase II proposal instructions.

Nearly all observers should use the MULTIACCUM mode, as it provides the highest quality scientific data.


 7.3 Detector Artifacts  8.1 Introduction
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