Auroral Television -98 (ATV-98)

spaceweb@oulu.fi - last update: 10th November 2000, 1045 UT (JJ)


 

The ATV-98 is a real-speed TV-camera, which is based on the II-generation intensified CCD-chip. The image intensifier provides a decent image quality with a good quantum efficiency for real speed cameras. It is attached to a solid-state image sensor by means of tapered fiber-optics. 

The camera was developed during 1998 and has been used in several field measurements. Time information is mixed into video data with a video timer. Data are stored on VHS tapes, from where it is afterwards digitized with frame grabbers like Data Translation DT3152. The main features of the ATV-98 are listed on the table below.

Camera is installed into insulated box which can be tilted and rotated into wanted direction. Box  can be kept in wanted temperature with thermostat and heater to keep the window open from ice and to protect the electronics. Heater can keep the camera operational even in temperatures around -40 degrees Celsius. 

Normally camera is equipped with 17 mm optics, providing field of view of 60 degrees. Although any kind of optics with Nikon F mount can be used to get the wanted Field-of-View.

ATV-98 is be used without interference filters, i.e. all images will be obtained with white light.

Box of ATV-98 in measurement site in Kilpisjärvi. Box is build of plywood and insulated to be used in extreme outdoor conditions.

 

Size of the camera body. Parts from left: CCD-camera, image intensifier, objective mount, objective (Tamron 17mm f/3.5).

 

 

Technical information:

Camera Head:

  • Image sensor: DEP XX1710 L.L.L. 
  • Diagonal input area: 24.5 mm Resolution [lp/mm] 28 (min.) / 30 (typ.) 
  • Photo cathode: S20 
  • Image sensor: Sony ICX-024 high resolution CCD 
  • Image area: 8.8 mm (hor.) * 6.6 mm (vert.) (2/3") 
  • Video mode: CCIR B/W (25 frames/second) 
  • Video resolution: 450 lines

Optics etc.

  • Optics: Nikon F-mounting
  • Objectives: (Currently) Tamron 17mm f/3.5 and Nikon 135 mm f/2.
  • Diameter of the camera box: 360 mm * 360 mm * 500 mm.
  • Diameter of the whole camera: 600 mm * 600 mm * 700 mm.
  • Box material: Plywood.
  • Insulation: Polyurethane.
  • Heater: 10 W

Example Images!!

ATV-98 is mainly used in campaign-based measurements in Tromsö, Kilpisjärvi and Karesuvanto measurement sites (see map of sites). Cameras have also been used in continuous measurements (except full moon periods) in Kilpisjärvi and Karesunvanto during seasons 1998-1999 and 1999-2000. 

Obtained data is stored on normal VHS-videotapes (PAL) and can be found from Oulu group.

In case you are interested about data or some specific measurements, or you want some extra information about camera, please contact Ph. D. Kari Kaila (PI) or M. Sc. Jouni Jussila (scientist).

 

 

See also: