helical scanning

[′hel·ə·kəl ′skan·iŋ] (communications) A method of facsimile scanning in which a single-turn helix rotates against a stationary bar to give horizontal movement of an elemental area. (electronics) A method of recording on videotape and digital audio tape in which the tracks are recorded diagonally from top to bottom by wrapping the tape around the rotating-head drum in a helical path. (engineering) A method of radar scanning in which the antenna beam rotates continuously about the vertical axis while the elevation angle changes slowly from horizontal to vertical, so that a point on the radar beam describes a distorted helix.

单词	helical scanning
释义	helical scanning helical scanning [′hel·ə·kəl ′skan·iŋ] (communications) A method of facsimile scanning in which a single-turn helix rotates against a stationary bar to give horizontal movement of an elemental area. (electronics) A method of recording on videotape and digital audio tape in which the tracks are recorded diagonally from top to bottom by wrapping the tape around the rotating-head drum in a helical path. (engineering) A method of radar scanning in which the antenna beam rotates continuously about the vertical axis while the elevation angle changes slowly from horizontal to vertical, so that a point on the radar beam describes a distorted helix. helical scanning helical scanning Spiral computed tomography, see there.
随便看	dandy operation dandyprat dandy roll dandy roller dandy rolls dandy suction tube dandy ventriculostomy dandy walker complex dandy-walker cyst dandy-walker deformity dandy-walker malformation dandy walker syndrome dandy-walker syndrome dandy-walker syndrome network dandy-walker variant dandy, walter edward dane dane alliance for rail transit danebrog dane, clemence dane cook dane county dane county administrators of volunteer services dane county area genealogical society dane county arson response initiative, inc.