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Umbra SICD

Read a SICD scene without loading it — entirely in your browser

SICD file

Drop a SICD .nitf here, or click to choose

Nothing is uploaded and nothing is copied. Only the container directory and the scene description are read — a few tens of kilobytes from either end of the file, however large it is.

Scene

Collection geometry

Container

Motion

A spotlight collect stares for tens of seconds, and anything that moved is smeared through the full-resolution image. Splitting the aperture gives a sequence of shorter exposures that shows it.

Quick-look detail

Window rows Azimuth samples

Centre row Centre column

Frames Aperture fraction

Time direction

Amplitude

What the radar measured over the window, stretched so it can be looked at. No aperture split, so nothing is given up in resolution or in noise.

Low percentile High percentile

Colour (CSI)

Three overlapping sub-apertures as red, green and blue, over the same window. Grey means the scatterer returned the same energy from every look angle; colour means it did not.

Gamma Saturation

Low percentile High percentile

Footprint

Drop a SICD and its ground footprint is drawn here, with the scene centre and the corner the first row and column of the array lands on.

Press Make amplitude image. This is what the radar measured, with no sub-aperture processing — the reference the colour image is scaled against.

Load a quick-look to see the whole scene, then click it to place the processing window.

Click to place the window

Press Make colour image. Static scatterers come out grey; anything that changed across the dwell comes out coloured.

Choose a window and press Make motion frames. The animation appears here.