Data storage

The list of camera computers (see also cameras) is:

Images are saved in the directories /camera/NAME on the camera computers, where NAME is one of the names above. Data is automatically saved in a directory named after the date of the observation. Each burst (which will usually contain 20 to 100 images) is stored in a FITS file with the extension .out. The filename of each burst will contain the timestamp of the start of the burst in UNIX time format. The FITS header contains the following information:

DATE: start of burst in yyyy-mm-ddThh:mm:ss format
DATE_OBS: start of the observation run this burst belongs to in yyyy-mm-ddThh:mm:ss format
INSTRUME: name of the channel (for example, “GBand”)
OBSERVER: name of the observer (if properly filled in in the GUI)
OBJECT: name of the target (if properly filled in in the GUI)
EXPTIME: exposure time of each image in seconds
INTERVAL: interval between images in seconds
FILTER: position of the filter (usually in Ångstrom)

There are two ways to access the directories where the data is saved in every camera computer.

From all DOT machines

The data is available via automounted NFS:

cd /camera/NAME

where NAME stands for the name of the camera computer.

On the camera computer itself

Connecting via ssh to the camera computer:

ssh dot@NAME   (As dot user) 
ssh root@NAME   (Or as root)
cd /storage

where NAME stands for the name of the camera computer.

Storage space

Every 30 minutes of solar observation in the normal speckle configuration (not frame selection mode) corresponds to approx. 15 GB of data in every camera computer.