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| Paper: |
ALMA Binary Data Transport Mechanism using VOTable Headers |
| Volume: |
351, Astronomical Data Analysis Software and Systems XV |
| Page: |
501 |
| Authors: |
Wicenec, A.; Meuss, H.; Pisano, J. |
| Abstract: |
ALMA will produce very large data rates and volumes. In full operation the correlator will generate up to 60 MB/s of visibility data. These data have to be transported from the correlator on the high site (5000 m) to the ALMA archive, the telescope calibration and the quicklook subsystems, which are all located at the low site (2500 m) some 40 km away. A dedicated fiber connection between the sites is under construction and the interfaces between the subsystems are under development. The actual transport format produced by the correlator has been defined and implemented and is described in this paper in more detail. The format is derived from the SOAP with attachments [1], but instead of the SOAP XML envelope it is using a slightly modified VOTable [2] to keep the description of the binary data. The VOTable uses content ID pointers (CID, RFC2111 [3]) to refer to the binary parts contained in the same Multipart/Related (RFC2387 [4]) container. Such Multipart/ Related containers are constructed for each ALMA integration and sent through a multimedia streaming connection implemented in CORBA (TAO[5, 6]). |
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