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Introduction to the ACS
Space Telescope Science Institute
Cycle 20 Phase II Proposal Instructions
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HST Phase II Proposal Instructions for Cycle 20 > Chapter 11: Advanced Camerafor Surveys (ACS) > 11.1 Introduction to the ACS
11.1 Introduction to the ACS
The Instrument Configurations and Operating Modes described in this chapter are used for the Visit and Exposure Specifications. The legal Visit and Exposure Specifications entries are discussed in the following sections. More complete descriptions of Instrument Configurations, Modes, Apertures, Spectral Elements, etc. are available in the ACS Instrument Handbook.
Many of the Optional Parameters have default values. In such cases an Optional Parameter entry in these Specifications is necessary only if it is desired to override the default value. In the STScI proposal system, the physical units of Optional Parameter quantities are always implicit and should never be entered by the observer.
The following tables list the permitted Instrument Configurations, Operating Modes, Apertures, Spectral Elements, and Optional Parameters for the ACS.
Table 11.1: Supported Instrument Parameters for the ACS
Config
Mode
Aperture
Spectral Elements
Optional Parameters
ACS/WFC
ACCUM
WFC, WFC-FIX, WFC1, WFC2,
WFC1-CTE, WFC1-FIX, WFC2-FIX
WFCENTER,
WFC1-512,
WFC1-1K,
WFC1-2K,
WFC1-IRAMP,
WFC1-MRAMP,
WFC2-MRAMP,
WFC2-ORAMP,
WFC1-IRAMPQ,
WFC1-MRAMPQ,
WFC2-ORAMPQ
See Table 11.2.
CR-SPLIT,
IMAGE
ACS/SBC
ACCUM
SBC, SBC-FIX
See Table 11.5.
 
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