Definitions beginning with U

(Unit Control Position): The WSR-88D radar operator uses this to control the entire radar system. One of the main things that the radar operator will do at the UCP is change volume scan strategies of the antenna. These volume scan strategies tell the radar how many elevation angles will be used during a single volume scan (a volume scan is the completion of a sequence of elevation angles), and the amount of time it will take to complete that sequence of elevation cuts, each one being a single rotation of the antenna's 1 degree beam at selected elevation angles. The WSR-88D uses 3 scan strategies. They are the following: 14 elevation angles in 5 minutes (this is used during severe weather situations), 9 elevation angles in 6 minutes (this is used when there is precipitation within 248 nautical miles of the radar), and 5 elevation angles in 10 minutes (this is used when there is no precipitation within 248 nautical miles). The radar operator at the UCP can also adjust the radar products and help the users out with their communication problems.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: CMPLT, ENTR, Unit Control Position

Universal Description, Discovery, and Integration (UDDI) is an XML-based standard for describing, publishing, and finding Web services. UDDI is a specification for a distributed registry of Web services.
Sun Microsystems - Cite This Source - This Definition
Browse Related Terms: Java API for XML Registries (JAXR), registry provider, XML registry

Unsymmetrical Dimethylhydrazine (a liquid propellant rocket fuel).
DoD Missile Defense Agency - Cite This Source - This Definition
Browse Related Terms: ASROC, Delta-V, ERCS, FRAS, Free Rocket, LRB, MRL, SATURN, SRB, SSRMP, SUBROC

User Datagram Protocol, the typical way to send datagrams over the Internet.
Perl - Cite This Source - This Definition
Browse Related Terms: broadcast, datagram, IP, protocol, TCP

User Datagram Protocol. A connectionless network protocol that provides simple but unreliable transmission. An alternative to TCP that does not contain error checking.
NetApp - Cite This Source - This Definition
Browse Related Terms: Address Resolution Protocol (ARP), ARP, DHCP, Dynamic Host Configuration Protocol (DHCP), RARP, Reverse Address Resolution Protocol (RARP), User Datagram Protocol (UDP)

Abbreviation for user datagram protocol. An Internet protocol for datagram service.
ATIS - Cite This Source - This Definition
Browse Related Terms: ASP, BSE, CNS, CTX, DSU, EAS, POTS, R/C, sap, TSPS

A connectionless protocol within TCP/IP that corresponds to the transport layer in the International Standard Organization's Open System Interconnect (ISO/OSI) reference model. UDP converts data messages generated by an application into packets to be sent through IP, but it is unreliable because it does not establish a path between sender and receiver before transmitting and does not verify that messages have been delivered correctly. UDP is more efficient than TCP, so it is used for various purposes, including Simple Network Management Protocol (SNMP). The reliability depends on the application that generates the message. [Exchange 2007]
Microsoft - Cite This Source - This Definition
Browse Related Terms: Message Header, SMTP (Simple Mail Transfer Protocol), SPF (sender policy framework), TCP (Transmission Control Protocol), X-header

The User Datagram Protocol (UDP) is a set of rules that allow communication between two processes across a network. The protocol is unreliable, which means that information is not guaranteed to be transferred correctly between the two processes. See Transmission Control Protocol (TCP) for an alternative reliable protocol.
David J. Barnes - Cite This Source - This Definition
Browse Related Terms: datagram, IP, port, scheme, TCP endpoint, TCP/IP, TCP (Transmission Control Protocol), WDP (Wireless Datagram Protocol), WSP (Wireless Session Protocol), WTP (Wireless Transaction Protocol)

Universal Documentation System. A standardized comprehensive tool for stating and coordinating program requirements for testing MRTFB ranges, as well as the capabilities and plans of test ranges to support program requirements. It consists of a series of six planning and execution documents: 10 are the Program Introduction (PI) (also called the Program Introduction Document (PID)), 2) Statement of Capability (SC), 3) Program Requirements Document (PRD), 4) Operations Requirements (OR), 5) Program Support Plan (PSP), and 6) the Operations Directive (OD). The UDS was developed and is regulated by the Range Commanders Council (RCC).
DoD Missile Defense Agency - Cite This Source - This Definition
Browse Related Terms: CARD, Cost Analysis Requirements Document (CARD), DCN, Doc, DOCPREP, MIIRD, NMSD, PD, SDD, UMD, VDD