Thermal - September 16, 2001

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September 17, 2001
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September 18, 2001
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September 19, 2001
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September 20, 2001
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September 21, 2001
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September 22, 2001
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September 23, 2001
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Comparison of September 16, 2001 (green) and September 22, 2001 (yellow)
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September 25, 2001
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September 26, 2001
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September 27, 2001
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September 28, 2001
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September 29, 2001
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September 30, 2001
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October 1, 2001
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Comparison of September 25, 2001 (blue) and October 1, 2001 (red)
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October 2, 2001
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October 3, 2001
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October 4, 2001
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October 5, 2001
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October 7, 2001
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October 8, 2001
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October 9, 2001
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October 10, 2001
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October 15, 2001
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October 21, 2001
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The image above is a computer composite of an orthophoto map image (horizontally accurate to plus or minus three feet) of the World Trade Center site acquired on September 17, 2001 combined with an image captured using a thermal camera system. The color composite overlay is generated using a thermal sensor that is sensitive to infrared radiation rather than light and thus shows the location of hot spots within the debris field where there is a strong probability of lingering underground fires. Thermal images captured after September 28, 2001 are displayed over the September 30, 2001 orthophoto map image.