19.8.5.1 Example

A DAS acquisition records 10 minutes of raw data starting at 1 May 2016 at noon. Because of the large number of loci (5000) and the high OutputDataRate of (1kHz) it is decided to split the data set in two five-minute recordings and store the raw data in two HDF5 files called part1.h5 and part2.h5.

The DAS external dataset parts for these files in the XML and H5 contain:

Part1.h5

ExternalDataset

• Count = NumberOfLoci x OutPutDataRate x time = 5000 x 1000 x 5 x 60 = 1 500 000 000
• PathInExternalFile = /Acquisition/Raw[0]/RawData
• StartIndex = 0
• DasExternalDatasetPart:
  • PartStartTime = 2016-05-01T12:00:00.000000+00:00
  • PartEndTime = 2016-05-01T12:04:59:999000+00:00

Part 2.h5

ExternalDataset

• Count = NumberOfLoci x OutPutDataRate x rate = 5000 x 1000 x 5 x 60 = 1 500 000 000
• PathInExternalFile = /Acquisition/Raw[0]/RawData
• StartIndex = 1 500 000 001
• ExternalDatasetPart:
  • PartStartTime = 2016-05-01T12:05:00.000000+00:00
  • PartEndTime = 2016-05-01T12:09:59:999000+00:00

RawDataTime

• StartTime =2016-05-01T12:00:00.000000+00:00
• EndTime = 2016-05-01T12:09:59:999000+00:00