Arifur Sabeth 11302009 Introduction Space debris also known as orbital debris space junk First satellite was launch in 1957 and break up in 1961 sodiumpotassium NaK is one ID: 643476
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Slide1
Space Debris
COSC 4335by Arifur Sabeth11/30/2009Slide2
Introduction
Space debris, also known as orbital debris, space junk First satellite was launch in 1957 and break up in 1961.sodium-potassium (NaK)is one of the most important non-fragmentation sources of space debris Slide3
Travelling speed
In low Earth orbit (below 2,000 km), orbital debris circle the Earth at speeds of 7 to 8 km/s. However, the average impact speed of orbital debris with another space object will be approximately 10 km/s.Slide4
Effects
Debris left in orbits approximately 600 km normally fall back to Earth within several years. At altitudes of 800 km, the time for orbital decay is often measured in decades. Above 1,000 km, orbital debris will normally continue circling the Earth for a century or
more.Slide5
Objective
The objective of this paper is to find the effect of the NaK droplets on the long term evolution around the earth.Slide6
Pre-processing data
Two types of Datasets are givenCorrelate them and visualize the effects of a new leakage.Possible future accidental loss. Slide7
Feature selection/
Dimensionality reductionIsolate NaK droplets from the 4014 objects in the 10-column tableNaK
droplets are supposed to be spherical in
shape
Find the high
concentration in polarization of the
NaK
objects
We can find concentration
” or “clustering” in terms of their polarization, inclination, and altitudes.Slide8
Data mining
By using WECA (software) Slide9
Post processing
After using the Data mining algorithm we reduces the number of data from 4143 rows to 66 rows. Slide10
Results
Sodium potassium coolant droplets (NaK)~ 1 mm to 5 cm The effects of a new leakage at the low altitude of Cosmos 1900 would be significant.Slide11
Question? Comments!
Thank you.