Data handling

at
Categories
Tags

 

 

 

 

 

1. Designers are looking at the data handling subsystems for two different spacecraft. One will
orbit Pluto to take high resolution photographs of this dwarf planet and transmit them at a
low data rate to the operations center on Earth. The other will be in low earth orbit to detect
Russian SU-30 afterburners. Discuss the trade-offs in complexity for the CDHS for each of
these spacecraft.
2. A spacecraft with a requirement for 500 W of continuous power is in an orbit at an altitude
of 1500 km. Compare the performance and mass of Nickel Hydrogen versus Lithium Ion
batteries for this mission.
3. Research an interplanetary mission and describe its electrical power subsystem. What were
the pros and cons of its approach?
4. A cube 1 m on a side is in interplanetary space. If the absorptivity, α, is 0.3 and the emissivity,
Ɛ , is 0.7, what is the thermal equilibrium temperature of the cube? Assume an internal heat
of 100W and only one side faces the sun, which has a solar flux = 1367 W/m2
.
5. An Earth-observation satellite will launch on a vehicle with high-amplitude ascent vibrations
at a frequency of 25 Hz. The mass of the spacecraft is expected to be between 500 and 1000
kg.
a. What range of equivalent spring constants must the structure avoid?
b. Describe an appropriate structure for this mission scenario.
1. Given a payload mass of 75 kg, estimate the spacecraft’s total mass and volume. 2. Describe the two
major components of an attitude control subsystem – i.e. actuators and sensors, and provide three
examples of each. 3. Describe the three common momentum control devices. What are their main
differences? 4. What are disturbance torques and how do they affect a spacecraft? Calculate orders of
magnitude, rank order them and discuss their relative influence for a: i. LEO satellite ii. GEO satellite 5.
What is momentum dumping? When and why is momentum dumping needed?

 

 

 

 

Sample Solution

Not withstanding the projections for understudy credit default increments and constancy diminishes there are likewise monetary and “decision” contemplations. As of now, forthcoming understudies select an establishment of their decision and afterward finance educational cost with gifts, grants, advances, and reserve funds. This enables private schools and open universities to seek a similar understudy, and understudies audit money related guide grants and at last settle on choices dependent on funds – as well as fit.
For a few understudies, being a piece of an entering first year recruit class of 8,000 understudies might overpower, and sitting in an address lobby with 200 may not be their favored method for learning. These are the sorts of understudies who are as of now pulled in to littler private establishments where swarms are littler and educator connection is increasingly close to home. What’s more, most much of the time, these are private schools and colleges that don’t get immediate help from the state or government.
So what happens when a secondary school senior and his or her folks look at a private school in New York with the yearly educational cost of $50,000, or even one where educational cost is only $14,000, with Binghamton University– SUNY, where educational cost is zero? Will the little private school merit any thought? Presumably not. In any case, pause, where will the understudy prosper? What condition will fuel their prosperity? What’s best for the understudy? Will any of that be considered once they have the choice of “free school”?
The end result for the private universities? Will they wind up wiped out? Did Governor Cuomo expect to issue a capital punishment to private schooling in his mission to make instruction free at the state funded schools? What effect will “free school” have on his place of graduation, Fordham University? Educational cost at Fordham surpasses $47,000 every year – and that is present educational cost without expens

This question has been answered.

Get Answer