1. Teide-Stars-Cam: An ultra-low-light black and white camera to show Mount Teide and stars setting behind it at night. This camera does not function in the day.
2. Dome-Cam: A standard black and white camera to look at the dome.
3: Teide-Cam: A sun resistant colour camera to look at Mount Teide in the day.
4: Analemma-Cam: A wide field colour camera with a solar filter to produce an analemma.
5: Road-Cam: A sun resistant colour camera to look east down the path towards the road and other buildings.
6: Pier-Cam: This cannot be seen on the picture, it is a low light black and white camera looking at the pier / mount / telescopes.
7: Pole-Star-Cam: This cannot be seen on the picture, it is an ultra low light black and white camera for viewing the pole star and surrounding stars.
8: Puerto-Cam: This camera cannot be seen on the picture. It is in about the same place as Pole-Star-Cam, but it looks down the side of the mountain towards the town Puerto De La Cruz.
9: OGS-Cam: This camera looks at the ESA dome. It cannot be seen on the picture but it is on the same side of the roof as Puerto-Cam and Pole-Star-Cam. This is an Axis network camera - it is not a regular video camera and does not connect to the video switchbox.
10: Night-Sky-Cam: The only external camera shot of our building comes from this camera, which is mounted in the Night-Sky building. This building can be seen on the right of the picture from Road-Cam. This is an Axis network camera - it is not a regular video camera and does not connect to the video switchbox.
Except OGS-Cam and Night-Sky-Cam, all the cameras output a standard composite video TV signal in PAL format at 25 frames per second.
The eight video signals are fed into two Burst Electronics VS4x1R video switch boxes. The switch boxes can be controlled manually or via their serial ports. The video signal from the first video switch box is fed into a standard TV capture card in the control computer and the signal from the second box goes to the weather computer in the same way.
When a logged-in web user requests an image, the main web site generates a corresponding request for an image. After working out which computer the requested camera is attached to, it sends the request to the telescope site. (Non-logged in users see a cached picture refreshed every five minutes).
The HTTP request from the web site is received by custom web-cam server software on either the Control or Weather computers. The software switches the video switch box to the correct camera, takes an image, formats it to the correct size as requested by the web site and then returns the image to the web site.