|HST Call for Proposals for Cycle 25|
In Phase I, proposers submit a scientific justification and observation summary for peer review. The review panels and the Time Allocation Committee (TAC) recommend a list of proposals to the STScI Director for preliminary approval and implementation (see Chapter 6). This Call for Proposals focuses on Phase I policies and procedures. Separate documentation is available for Phase II.In Phase II, investigators with approved Phase I proposals must provide complete details of the observations in their proposed observing program. This allows STScI to conduct a technical feasibility review, and to schedule and obtain the actual observations. Programs are not approved fully until after submission of an acceptable Phase II program.