I have an image . It contains a TerraSAR-X interferogram amplitude image (proportional to ₀, but not calibrat- ed) from an experiment in the Gulf of Mexico. It is a floating point array of 15003000 pix- els in a simple binary file. When you display the linear intensities (recommendation: tvscl,t0<10000.0), you will see a pronounced bright front in the ocean. Please try to find out how much brighter this front is compared to the surrounding waters. Use a tech- nique similar to the one we developed to extract the internal wave signature profile a few days ago (the advanced line-shifting technique, not the simple rotation-based one).

• You are able to find the location of the front in several hundred lines of the image, and you display a version of the image on the screen in which the shape of the front is high- lighted as a smooth black or white line:

Comment: There may be some outliers in the initial front locations you find line by line (e.g. if the brightest pixel in a line is not at the front, but somewhere else), so you may need to smooth or median-filter the input data or your initial detected front locations to obtain a smooth line.

• You compute the mean intensity profile of the front correctly and show it as a plot in an- other window on the screen.
• You compute the relative intensity of the front correctly and obtain approximately the same peak intensity relative to the ambient intensity that I obtained from my own calcu- lations (a little more than 3 times the ambient intensity)