Waypoint
Waypoints are locations or landmarks worth recording and storing in your GPS. These are locations you may later want to return to. They may be check points on a route or significant ground features. (e.g., camp, the truck, a fork in a trail, or a favorite fishing spot). Waypoints may be defined and stored in the unit manually by taking coordinates for the waypoint from a map or other reference. This can be done before ever leaving home. Or more usually, waypoints may be entered directly by taking a reading with the unit at the location itself, giving it a name, and then saving the point. Waypoints may also be put into the unit by referencing another waypoint already stored, giving the reference waypoint, and entering the distance and compass bearing to the new waypoint. WAN
A geographically dispersed network formed by linking several computers or local area networks (LANs) together over long distances, usually using leased long-distance lines. WANs can connect systems across town, in different cities, or in different regions of the world. WAP
Wireless Application Protocol. A global standard for developing applications over wireless communication networks, mostly used on mobilephones. WAP features the Wireless Markup Language (WML), which was derived from Phone.com's HDML and is a streamlined version of HTML for small screen displays. It also uses WMLScript, a compact JavaScript-like language that runs in limited memory. WAP also supports handheld input methods such as a keypad and voice recognition. With the right software, a handheld can access the Internet using WAP. Warm Start
Used to describe state where a GPS receiver is powered on and still has valid almanac data available. This shortens the time required to locate satellites and arrive at the first position solution. Wide Area Augmentation System (WAAS)
This system provides a satellite signal to augment GPS for precision aircraft flight and landing navigation. Wide Area DGPS (WADGPS)
A form of DGPS in which the user’s GPS receiver receives corrections determined from a network of reference stations distributed over a wide geographical area. Separate corrections are usually determined for specific error sources (such as satellite clock, ionospheric propagation delay, and ephemeris) and are applied in the user’s receiver or attached computer in computing the receiver’s coordinates. The corrections are typically supplied in real time by way of a geostationary communications satellite or through a network of ground-based transmitters. Corrections may also be provided at a later date for postprocessing collected data. World Geodetic System 1984 (WGS-84)
A set of parameters, established by the U.S. Defense Mapping Agency, for determining geometric and physical geodetic relationships on a global scale. Windows CE
Windows CE is based on the Microsoft Windows operating system but is designed for including or embedding in mobile and other space-constrained devices. Windows CE is a 32-bit multitasking, multithreaded operating system. Wi-Fi
Wi-Fi (Wireless Fidelity) is the popular term for a high-frequency wireless local area network (WLAN). The Wi-Fi technology is rapidly gaining acceptance in many companies as an alternative to a wired LAN. It can also be installed for a home network. Wi-Fi is specified in the 802.11b specification from the Institute of Electrical and Electronics Engineers (IEEE) and is part of a series of wireless specifications together with 802.11, 802.11a, and 802.11g. All four standards use the Ethernet protocol and CSMA/CA (carrier sense multiple access with collision avoidance) for path sharing. The 802.11b (Wi-Fi) technology operates in the 2.4 GHz range offering data speeds up to 11 megabits per second. The modulation used in 802.11 has historically been phase-shift keying (PSK). The modulation method selected for 802.11b is known as complementary code keying (CCK), which allows higher data speeds and is less susceptible to multipath-propagation interference. Windows Mobile
The primary OS (operating system) in the Pocket PC market is Windows Mobile. Windows Mobile replaced Windows CE in most current Pocket PCs, has much of the look and feel of Windows, and features many "pocket" versions of popular Microsoft applications, such as Pocket Word, Excel, Access, PowerPoint, and Internet Explorer. Windows Mobile can also run set-top boxes, video game systems, palm-sized devices, and other consumer electronics. The current version is Windows Mobile 5.0. |
