| 单词 | iSCSI (internet Small Computer System Interface) |
| 释义 | iSCSI (internet Small Computer System Interface) via 48 highly focused spot beams, each of which has a footprint of approximately 30 miles (50 km) in diameter.Assuming line of sight (LOS) is available, the end user can connect directly from a satellite phone to a satellite using the L-band, at frequencies of 1.616–1.6265 GHz. Alternatively the user can connect from a landline through a local terrestrial gateway at Ka-band frequencies of 29.1–29.3 GHz on the uplink and 19.4–19.4 GHz on the downlink. When connected to the satellite, the inter-satellite links operate in the Ka-band, at frequencies of 23.18–23.38 GHz. Iridium is essentially a cellular telephone network in reverse. The satellites are much like cellular base station transceivers that whiz around the Earth whereas the user terminal device remains relatively stationary. Iridium applications go well beyond cellular telephony and currently include aviation and maritime applications such as aircraft and ship tracking and en-route voice, fax, and data communications between crews and terrestrial operations centers. See also base station, cellular radio, downlink, footprint, GEO, Ka-band, L-band, LEO, LOS, MSS, spot beam, transceiver, and uplink. IRTF (Internet Research Task Force) The group of the Internet Society (ISOC) that deals with long- term issues.The work of the IRTF is accomplished in small, focused research groups that work on topics related to Internet protocols, applications, architecture, and technology. See also application, architecture, Internet, ISOC, protocol, and technology. |
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