Download Space Debris Project

Space Debris
COSC 4335
by
Arifur Sabeth
11/30/2009
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
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.
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.
Objective
• The objective of this paper is to find the effect
of the NaK droplets on the long term
evolution around the earth.
Pre-processing data
• Two types of Datasets are given
• Correlate them and visualize the effects of a
new leakage.
• Possible future accidental loss.
Feature selection/ Dimensionality
reduction
• Isolate NaK droplets from the 4014 objects in
the 10-column table
• NaK 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.
Data mining
• By using WECA (software)
Post processing
• After using the Data mining algorithm we
reduces the number of data from 4143 rows
to 66 rows.
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.
Question? Comments!
• Thank you.