If a TSI system is run unattended and data is periodically downloaded once a day, what is the data volume in compressed mode going to be?
The TSI-440 has no storage capability – all storage and processing is done via a local networked Windows NT/2000 workstation, which is typically located adjacent to the TSI-440 or via a customer-supplied network located somewhere on the internet. Raw TSI-440 or TSI-880 unprocessed sky images take up about 30K bytes each. Because these are JPEG images, they are already compressed. Processed cloud data is approximately 6Knytes more so the volume per sample is about 36Kbytes. TSI systems do not collect images at night, therefore you need to know the total number of daylight hours to get the exact storage requirement for a given day. The storage volume depends on your sampling rate, which is typically once every 1-10 minutes. With today’s multi-Gbyte drives, storage should not be a big problem, but figure on 10Gb/year given one minute sampling. On the TSI-880 an optional data storage module (DSM) lets you move the images from a remote location that may not be connected to the Internet. You
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