Chapter 6:
Orbit Calculation for a Phase I Proposal
6.1 Construction of an Observing Program
6.1.1 General Observer (GO) Programs
6.1.2 Snapshot Programs
6.2 HST Visits
6.2.1 When is a New Visit Required?
6.2.2 Maximum Duration of a Visit
6.2.3 Instrument Specific Limitations on Visits
6.3 The Visibility Period
6.4 Acquisition Times and Instrument Overheads
6.4.1 Guide Star Acquisition Times
6.4.2 Target Acquisition Times
6.4.3 Instrument Overhead Times
6.4.4 Telescope Repositioning Overhead Times
6.5 Constructing Your Program
An important issue in the preparation of an HST observing proposal is to calculate the amount of observing time you need to request. This chapter guides you through the steps that are required to accomplish this task.
