Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/hst/acs/hst/wfc3/documents/handbooks/currentIHB/c09_exposuretime02.html
Дата изменения: Unknown
Дата индексирования: Tue Apr 12 11:25:25 2016
Кодировка:

Поисковые слова: р р р с р с р р р с р п п п п п п п п п п п п п п п п п п п п
WFC3 Instrument Handbook
WFC3 Instrument Handbook for Cycle 24
help@stsci.edu
Table of Contents Previous Next Index PDF


Wide Field Camera 3 Instrument Handbook for Cycle 24 > Chapter 9: WFC3 Exposure-Time Calculation > 9.1 Overview

9.1
Chapter 4 of this Handbook describes the procedures for designing a Phase I WFC3 observing proposal. Two of the steps involved in this process are estimating the exposure times needed to achieve your scientific goals, and then combining these individual exposures with their associated overheads to derive the number of spacecraft orbits that you will request in your Phase I proposal.
This chapter gives guidance on estimating exposure times. The following chapter, Chapter 10, then describes how to include the various overheads so as to determine the total number of spacecraft orbits needed for your program.
You should also refer to the Call for Proposals, which includes information on policies and practices with respect to orbit-time requests. The HST Primer provides specific advice on orbit determination. Below, we provide a summary of the WFC3 sensitivities and give several examples that illustrate how to calculate your exposure times for Phase I Proposals.

Wide Field Camera 3 Instrument Handbook for Cycle 24 > Chapter 9: WFC3 Exposure-Time Calculation > 9.1 Overview

Table of Contents Previous Next Index PDF