Hi Gerald,
The NZ coverage appears to be limited and quite variable. This is what it looked like this morning at 0826L Sydney time, a few aircraft up Auckland way. At other times I have seen a few aircraft in the south.
Forgot to mention that you can download
Photoshop Express for iPad, a nice little
FREE app with menu options to Crop, Straighten, Rotate, Flip, Exposure, Saturation, Tint, Black & White, Contrast, Sketch, Soft Focus, Sharpen, Reduce Noise, Effects and Borders.
