Chapter 8: Overheads and Orbit-Time Determination 8.1 Overview 8.2 ACS Exposure Overheads 8.2.1 Subarrays 8.3 Orbit Use Determination Examples 8.3.1 Sample Orbit Calculation 1: 8.3.2 Sample Orbit Calculation 2: 8.3.3 Sample Orbit Calculation 3: 8.3.4 Sample Orbit Calculation 4: 8.3.5 Sample Orbit Calculation 5: