YESDAQ DATABASE AND DISPLAY SYSTEM

YESDAQ software for MS-Windows NT/2000/XP supports the collection, database storage and web presentation of instrument data. It lets TSI and RSS users both view and analyze historical data. YESDAQ fully automates the retrieval, processing, and display of data from one or more instruments via the Internet. It supports data collection from multiple

YESDAQ is designed to meet the needs of the professional meteorological environmental data collection network. It is built around sophisticated standards such as TCP/IP networking for communication with remote systems, helping you leverage your organization’s existing Internet communication infrastructure. Because it automates all data collection and presentation processing, it frees you to perform the important tasks of data analysis and interpretation.

YESDAQ is standards-based and uses non-proprietary components including SQL and the Apache web server. In this era of rapid technological change, you can trust your data to YESDAQ and its underlying open source database technology. YESDAQ’s architecture rests on a powerful MySQL^TM database. The database is open source technology and thus well-tested and supported. It is also expandable as your network grows and you never have to worry that your data are locked up in some "proprietary format".

Managing many sites for an extended period of time can create a large data file repository of many GB. At that size data management issues become significant. YESDAQ system logs store errors that can arise from misconfigurations or periodic TCP/IP communications link problems. Data pruning can also be performed to either migrate data to tape or permanently purge it from the database.

Instrument data needs a pathway from remote systems into the central YESDAQ database. With the rapid growth of the Internet, TCP/IP provides a reliable and flexible solution and eliminates problems inherent with telephone modems (dropped connections, garbled data from random line noise, etc.) YESDAQ relies upon TCP/IP communications agents, called links, to periodically poll remote instruments via the Internet. Each link type is licensed to a specific instrument; YESDAQ installation ships with at least one link, but you can add more as your network of instruments grows. A sophisticated scheduler that can handle the collection of multiple remote sites simultaneously drives the collection engine. As data files are gathered, each is automatically checked for truncation or other common transmission errors. A retry is performed if any errors are encountered. Data are stored in SQL tables for later presentation, and depending on the site-polling interval, YESDAQ can present near-real-time data to remote users via the web.

Remote sites that do not have Internet connections can be supported by the optional miniature solid state Data Storage Module (DSM). DSMs permit up to 420 MB of local instrument data storage and permit collection of data from remote sites over an extended period of time. They can be "hot-swapped" from running instruments and brought to a network-connected laptop or desktop PC equipped with a PCMCIA Type I or II slot. Once a DSM is inserted in the PC, DSM-link software transfers data directly to a YESDAQ database (which can be installed on the local machine or anywhere on the Internet). DSM-link then clears the DSM module for reuse; several DSMs support round-robin use in networks where technicians can only visit remote sites periodically.

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