The radar system is a fundamental part of the launch site ground equipment, and its health status is critical to the success of testing tasks and launch missions at aerospace launch sites. The health status assessment of radar systems is, however, challenging due to multiple health indicators of its components and epistemic uncertainty associated with the elicited data. In this article, a fuzzy analytic hierarchy process method, which combines the analytic hierarchy process (AHP) and fuzzy comprehensive evaluation methods, is put forth to assess the health status of radar systems at aerospace launch sites. In the first place, the four‐layer hierarchical structure, including the system, subsystem, performance indicator, and parameter index layers, of a real‐world radar system at an aerospace launch site is constructed. The AHP is, then, leveraged to identify the weights of each layer of the hierarchical structure. By eliciting the data of parameter indices as fuzzy numbers and using the fuzzy comprehensive evaluation method to calculate the layer‐by‐layer health status of the hierarchical structure, the health grade membership of the radar system is calculated. The health status of the radar system is, then, assessed in accordance to the maximum membership principle. A new importance metric is proposed to assess the influence of parameter indices on the current system's health status. The results of the importance metric can provide valuable insight for reliability enhancement and health management of the radar system.

This paper describes and illustrates the morphological traits of Impatiens zhaojueensis Q. Luo (Balsaminaceae), a new species from the Sichuan Province of southwestern China. Using a scanning electron microscope (SEM), the micromorphological characteristics of its pollen grains and seeds are also described. The new species is closely related to Impatiens baishaensis, but it has larger flowers, obround dorsal petals, somewhat clawed lateral united petals, obround or obround‐dolabriform distal lobes and the ornamentation on the pollen grains has wider meshes.

Impatiens sikaiensis Q. Luo & Y. Yuan, a new species of the genus Impatiens from Zhaojue County, Sichuan, China, is described in detail with its morphological characteristics, photographs and physical drawings. The species resembles Impatiens uniflora morphologically but can be distinguished from the latter by its yellow flowers; ovate bracts with long‐cuspidate apex, 5–9 mm long; lateral sepals 6–12 mm long; dorsal petals with a narrowly cristate swelling at abaxial mid‐vein, and a rough tip at the apex. The micro‐morphological features and surface patterning of the pollen grains and seeds of the new species were examined using scanning electron microscopy (SEM). This revealed that the pollen grains of the new species typically have 5 angles and 5 germ furrows, which has not before been reported in the species of Impatiens commonly found in China.