New arthropod-Podostemaceae associations in Central and South America.

Podostemaceae are a unique family of aquatic angiosperms found in river rapids and waterfalls throughout southern Asia, Africa, and the Americas. Podostemaceae are understudied, and consequently, the arthropods associated with these plants are not well known. We sought to expand knowledge of arthropod-Podostemaceae associations to better understand the impact of these plants on aquatic ecosystems and biodiversity.

Monopulse ladar: super-resolved 3D localization with Si-photonic serpentine optical phased arrays.

We present an optical ranging and super-resolution object localization method, monopulse ladar, used to determine the angle of a point target in two dimensions to a few percent of an optical beam width from differential measurements of four just-resolved waveform-encoded beams while simultaneously providing target range via either coherent or incoherent coded waveform correlation. A common optical carrier is shifted by four GHz-scale tones, each modulated with distinct ranging waveforms, which when transmitted from a Si-photonic 2D wavelength-steered serpentine optical phased array (SOPA) aperture form an encoded rectangular beam cluster that propagates to and scatters from a distant point target. Superposed backscattered target returns from each beam are decoded by correlation with reference waveforms at the receiver.

Corrigendum: Plastid Genomes of Five Species of Riverweeds (Podostemaceae): Structural Organization and Comparative Analysis in Malpighiales.

[This corrects the article DOI: 10.3389/fpls.2019.

Plastid Genomes of Five Species of Riverweeds (Podostemaceae): Structural Organization and Comparative Analysis in Malpighiales.

With the advent of next-generation sequencing technologies, whole-plastome data can be obtained as a byproduct of low-coverage sequencing of the plant genomic DNA. This provides an opportunity to study plastid evolution across groups, as well as testing phylogenetic relationships among taxa. Within the order Malpighiales (∼16,000 spp.

A photometer array for atmospheric gravity wave measurements on the Lower Atmosphere Ionosphere Coupling Experiment (LAICE) mission.

The photometer payload of the lower atmosphere ionosphere coupling experiment CubeSat mission will observe and characterize atmospheric gravity wave (AGW) propagation through the mesosphere/lower thermosphere region of Earth's atmosphere on a global scale. AGW characteristics will be measured via passive observation of airglow emission from atmospheric O( ) at 762.0 nm (OA) and Herzberg I O( ) at 277.