Lab 7 – Radar Image and Edge Enhancement
Introduction
Commonly used methods to analyze synthetic
aperture radar (SAR) data include speckle suppression, image
enhancement, edge enhancement, and texture analysis. In this
lab, texture analysis is introduced in the detection of small
ships off Oregon Inlet, Outer Banks, NC. Now, let’s start the
s/w and view ALOS PALSAR 20061205.img (Fig. 1).The
data were acquired on December 5, 2006 for areas around
Pamlico Peninsula, Dare County, NC. The Pamlico Sound and
Atlantic Ocean is on the east. Greenville, NC should be southwest to the image. Two white arrows point to two military
bombing ranges in the area. The area shaped in a triangle and
in black as pointed a black arrow is area with missing that is
caused by the orbit of the satellite. Answer questions 1–3.
Since this the final lab, only the print screen is given for the
analysis. You are required to locate this program within the
IMAGINE software through search and find. Answer
questions 4 and 5.
Fig. 1, PALSAR image of Pamlico Peninsulas.
Questions
1.
(1 point) Google what ALOS and PALSAR
stand for?
2.
(1.5 point) What are the wavelength in
centimeters, band name, and polarization(s)
of the ALOS PALSAR?
3.
(0.5 point) Based on the shape of the
missing data area, what was the satellite
orbit (ascending or descending) when the
PALSAR sensor was collecting the data.
The PALSAR is always right-side looking,
i.e., if the satellite is traveling south to north
(that is an ascending orbit) the sensor is
looking toward the east or right side.
4.
(1 point) Can you identify (guess) ships were within the image on 20071208_oregon_inlet.img and
20061208_oi_texture.img? If each bright spot is a ship, how many ships were within the area?
5.
(1 point) Your 20061208_oi_texture.img.
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Acknowledgment
This lab handout was supported by an AmericaView grant to the East Carolina University at Greenville,
North Carolina, 27858, USA. The 20061205.img© and 20071208_oregon_inlet.img© were granted by the Japan
Aerospace Exploration Agency (JAXA) to the East Carolina University.
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