Chapter 4:
Observation Types and Special Requirements

4.1 Primary Observations

4.1.1 Continuous Viewing Zone (CVZ) Observations

4.1.2 Target-of-Opportunity (ToO) Observations

4.1.3 Special restrictions on observations with COS, STIS/MAMA and ACS/SBC

4.1.4 Solar System Targets

4.1.5 Observations of Targets that have not yet been discovered or identified

4.1.6 Time-Critical Observations

4.1.7 Dithering strategies with ACS and WFC3

4.2 Parallel Observations

4.2.1 Coordinated Parallel Observations

4.2.2 Pure Parallel Observations

4.2.3 Restrictions and Limitations on Parallel Observations

4.3 Special Calibration Observations