The first steps in preparing an HST
program are to establish a set of science goals and to explore whether HST
can be used to achieve those science goals (using the information provided in the HST Call for Proposals
, the HST Primer
and the instrument handbooks). Once an observer has decided that HST
can achieve the science goals, they must prepare a formal proposal.
In this Chapter we give an overview of the steps that are taken in preparing an HST
observing proposal that involves WFC3 observations. “Phase I
” refers to the initial proposal that is reviewed by the Telescope Allocation Committee (TAC). The Phase I proposal presents the scientific justification for the project, lists the targets to be observed and the instrument(s) and spectral elements to be used, and includes a request for a specific number of spacecraft orbits. (See the HST Call for Proposals
and HST Primer
for a full discussion of all policy issues and additional guidance.)
The Phase I proposal does not contain many of the details that are actually required to carry out observations with HST
. These are included in a “Phase II
” proposal that will be needed if and after the proposal is recommended by the TAC and approved by the STScI Director. The Phase II Proposal Instructions
are a vital resource at that time.