Other Flashcards
Where is space?
Over 80 km according to US air force, 100 km according to everyone else
Why is SOFIA expensive?
Many people needed to operate it, ~400
Phases of a space project
- Scientific idea
- Scientific objectives
- Scientific requirements
- Technical solutions
The Space mission Analysis and Design Process
Define objectives
Characterize the mission
Evaluate the mission
Define requirements
Define Objectives
- Define broad objectives and constraints (broad brush strokes)
- Estimate quantative mission needs and requirements
Characterize the mission
- Define alternate mission concepts (what do you want it to do?)
- Define alternate mission architectures (how will it do it?)
- Identify system drivers for each (performance and cost drivers, e.g. number of satellites, orbit, size)
- Characterize mission concepts/architectures
Evaluate the mission
- Identify drivin requirements
- Evaluate mission utililty
- Define mission concecp (baseline)
Define requirements
- Define system requirements
2. Allocate requirements to system elements
What objects are in LEO?
Space shuttle, ISS, HST, Iridium, Remoste sensing, military
Waht objects are in MEO?
GPS, Galileo
What objects are in GEO?
Meteorology, communication
What do we call the amplitude of RV motion?
K
What can we do with the K from RV?
K = (2 pi G /P) ^(1/3) m_p sin(i) m_s^(-2/3) *1/(sqrt(1-e^2)) = (2piaM_p sin(i))/((M_p+M_s) P sqrt(1-e^2)
V_rad in terms of K?
V_rad = V_0,z + K[cos(theta(t)+omega_op)+e cos(omega_op)]
velocity of the star?
v_star = M_p/(m_p+M_s) *v_p
