SSE-120 Understanding Orbits Questions 1. Why are the suns rays shown as parallel when reaching the earth? 2. Does the earth have the axis tilted all year.

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SSE-120 Understanding Orbits Questions 1. Why are the suns rays shown as parallel when reaching the earth? 2. Does the earth have the axis tilted all year long? 3. Dose the orbit shown spend any time in the eclipse? Sun – Earth System 1. How can you the estimated inclination for orbit? 2. What would it be for the spacecraft inclination going in the opposite direction? 3. Will the inclination change with increase in altitude? 4. Will the inclination change if the orbit were elliptical? 1. Does the eclipse of the earth change with seasons? 2. If there are no disturbing perturbations to the orbit, draw a terminator orbit for each season. 3. Does the terminator orbit differ for each season?

SSE-120 Understanding Orbits 1. Does the eclipse of the earth change with orbit altitude? 2. Will they eclipse time of the spacecraft change with an increase in altitude? 3. Does an eclipse occur with a GEO spacecraft? 1. Does the eclipse of the earth change with seasons? 2. If there are no disturbing perturbations to the orbit, draw a terminator orbit for each season. 3. Does the terminator orbit differ for each season? 1. Where is the eclipse in this diagram? 2. What would you consider to determine if this orbit experience an eclipse over a year? 1. Does the eclipse of the earth change with orbit altitude? 2. Will they eclipse time of the spacecraft change with an increase in altitude?

SSE-120 Understanding Orbits 1.What would be the eclipse time if a spacecraft could orbit at zero altitude? 2.What is the eclipse time for an altitude of 750 km for the noon-midnight orbit? 3.What would be the maximum eclipse time for a 750 km altitude orbit if the inclination was 90 degrees?