FMI old all-sky cameras: Sample images

WWW-work The images taken by the old cameras (used before 1996) contain information about the date and time when the image was taken. Also, three light standards are also imaged. Note that because this camera construction uses a spherical mirror the camera blocks the centre of the image. Thus the green light standard can be placed in the middle of the spherical mirror without losing important details from the zenith.

Sample images

The sample images here have been compressed with lossy compressing JPEG-compression. This means that small details in the images are lost but that the compression ratio is larger.

Green aurorae



A nice green auroral arc



A beautiful blue auroral arc


More information: Kirsti Kauristie
e-mail: firstname.lastname@fmi.fi