octant


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octant

[′äk·tənt]
(mathematics)
One of the eight regions into which three-dimensional Euclidean space is divided by the coordinate planes of a Cartesian coordinate system.
A unit of plane angle equal to 45° or π/8 radians.
(navigation)
A double-reflecting instrument used primarily for measuring altitudes of celestial bodies from a moving ship or airplane; has a range of 90°, and while a sextant has the capability up to 120°, the common practice applies the name sextant to both types of instruments.

Octant

[′äk·tənt]
(astronomy)

Octant

 

a goniometric instrument whose main component is an arc that forms one-eighth of a circle and is divided into degrees and fractions of a degree. Instruments similar in design to sextants are usually called octants. Octants have almost completely fallen out of use.

octant

octant
octant
When an aircraft accelerates, inertia causes the otolith membrane in a pilots' otolith organ to move. This results in the sensation of climbing and might cause the pilot to push the stick forward and dive. The reverse would occur in case of deceleration.
An instrument similar to a bubble sextant but constructed with its arc graduated in degrees for an eighth of a circle. Frequently called a sextant. An octant can measure angles up to 90°.
References in periodicals archive ?
Among its findings, the NBI said the NCMH should have disqualified Octant Builders during the bidding process of the project since the tax clearance it submitted "belongs to Rowena Manzano (Little Lemon Children Warehouse) and not the Octoant Builders, the bidder."
Octant, according to Cortez, 'has been monopolizing' projects in the NCMH.
Vihonen, "Determination of the [[theta].sub.23] octant in long baseline neutrino experiments within and beyond the standard model," 2017, https://arxiv.org/abs/1708.05182.
Figure 3 also displays that an octant node n can have different states: free, occupied, or unknown.
The particular relevance of this page for the present analysis is that, among this array of classic projection geometries, da Vinci includes (at lower right) a clear reference to the octant triangular projection, tightly coupling this evidently autograph sheet to the conception underlying the mappamundi.
The discrete directions are pipelined so that the sweep along the next direction in the octant begins without waiting, when sweeping along the current direction is completed.
However, more recently Gershwin (2005) established the genus Alatina for all such cubomedusae, characterized by a tall and narrow bell, four crescentric, gastric phacellae, four "wing-like" pedalia, and three to four bifurcating to palmate velarial canals per octant. The taxonomic revision (Gershwin, 2005) resurrected five species of box jellyfish from the Indo-Pacific, previously synonymized under the name Carybdea alata, using the new genus-species combinations Alatina moseri, A.
If O is the origin of the x,y, z axes, (t) the trisector line x = y = z of the positive octant and n the plane x + y + z = 0 passing through the origin (O) and perpendicular to (t), then the tricomplex number u can be described by the projection S of the segment OP along the line (t), by the distance D from P to the line (t), and by the azimuthal angle 0 in the n plane.
He also served as on the board for Octant Business Services LLC in Littleton, Mass.
(i) The equilibrium point lies on the boundary on the positive octant; that is,
Hence, one begins the analysis of (3) by observing the nonnegative octant
Calculation of a sine-cosine with any of angles [phi], which is in the range 0-2[pi], can be reduced to the calculation of sine-cosine with angle [phi], which is in the first octant of 0 - [pi]/4.