Dundee Satellite Receiving Station allows free access to QuickLook (i.e. small) images for all satellite passes in our archive. This is a unique archive of the northern Europe and Atlantic region which goes back to 1979.

The images may be used for studying the weather, for research, or for browsing our archive with the intention of purchasing higher resolution data or images of a certain area.

All channels from the satellite's scanner are made available plus a pseudo-colour image and, for NOAA satellites, a Normalised Difference Vegetation Index (NDVI).

To find out which areas of the earth we cover please see our coverage document.

Registration

In order to satisfy the requirements of our funding body, NERC, we ask that you register with us before viewing our images. The information you supply helps us to determine which of our products are most useful and to whom (Education, Research, Personal use etc). Registration is free and instant, and subsequent access to our quicklook archive is free. You may choose a username and password which you find easy to remember, and if your browser supports cookies you will only ever have to enter them once.

Images Available

Alongside the quicklook images (typically 512x900, 100KBytes) we also provide thumbnail images which are smaller and faster to download (typically 102x180, 20KBytes). Many thumbnails can be viewed on a single page, enabling comparisions to be made between different satellite passes.

Recent passes are available as re-projected images showing the area around the UK in a standard view.

SeaWiFS: Note that we are only allowed to make SeaWiFS images available (including quicklooks) to people who have personally registered with NASA. See our SeaWiFS documentation for more details.

Geostationary satellite images cover the whole world and are made available for free, but they are received less frequently and are not archived.

Technical Notes

Quicklooks are intended for quick browsing of our archive and so the file size is kept as small as possible. In order to achieve this the images are reduced and modified in various ways:

Thumbnails are taken from the thermal channel 4 so that features are always visible. Night-time passes obviously have no information in the visible channels (1, 2).

Scale example (for AVHRR): if the satellite orbit takes 102 minutes to cover 360 degrees, it travels 360/102/60 degrees per second. It scans 6 lines per second which is 360/102/60/6 degrees ~= 0.01. If the earth is 40000 km around in 360 degrees, that is 111.11 km per degree, making each scan line 1.1 km. If the quicklook is reduced by 6 then each row in the image is 6.6 km.

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