Proposing Support

This page is an overview of and references to topics related to HST observing considerations, including guidelines, instructions and links to other documents in support of proposal applications. Proposers of Large programs are particularly encouraged to review the information provided here.

A concise overview of the HST orbital visibility characteristics and operating constraints can be found in Orbital Constraints of the HST Primer. Topics also include target viewing (including Continuous Viewing Zone, South Atlantic Anomaly and HST position uncertainty), Sun and earth limb pointing constraints, and telescope roll and orientation constraints.

Please Contact the HST Help Desk with any Questions

https://hsthelp.stsci.edu.