WEATHER NOTE: OBSERVATION OF TWO INTERSECTING RADAR FINE LINES

Intersecting Two-Dimensional Fractals with Lines

The Twin Dragon and Rauzy fractals are intersected with the real axis. In the Twin Dragon case, unexpectedly from its fractal nature, the intersection is an interval characterized by a finite automaton. For the case of the Rauzy fractal, it is proved that the intersection has infinitely many components.

Shortest Paths in Two Intersecting Pencils of Lines

Suppose one has a line arrangement and one wants to find a shortest path from one point lying on a line of the arrangement to another such point. We look at a special case: the arrangement consists of two intersecting pencils (sets of lines where all intersect in a point), and the path endpoints are at opposite corners of the largest quadrilateral formed. The open problem was to find a shortest...

Airborne Doppler radar observations of convective plumes and radar ‘fine-lines’ ERAD02-A-00007

Reflectivities and Doppler velocities from an airborne 95 GHz radar are used to describe the detailed (~25 m) vertical structure of plumes and mesoscale convergence lines (‘fine-lines’) in the optically-clear convective boundary-layer (CBL). Multiple radar configurations are used, including a profiling mode, with fixed antennas looking up and down, and a vertical-plane dual-Doppler mode, employ...

The Station Location Problem on Two Intersecting Lines

The station location problem consists of placing new stations along the railway tracks of an existing network in order to increase the number of users. In this paper we consider the problem for a railway network consisting of two intersecting lines forming an angle α. An approach for solving the problem in polynomial time for sufficiently large angles α is presented.

Synthetic Aperture Weather Radar