Elliptical orbit and squint mode are widely used in the system design of geosynchronous synthetics aperture radar (GEO SAR) to improve the coverage performance. In this paper, the effects of orbit height variation and...
详细信息
Elliptical orbit and squint mode are widely used in the system design of geosynchronous synthetics aperture radar (GEO SAR) to improve the coverage performance. In this paper, the effects of orbit height variation and squint mode to pulse repetition frequency (PRF) design are analyzed. The orbit height variation causes the variation of nadir interference and beam illumination region, and squint mode produces large range cell migration (RCM). These can induce invalidations of the designed PRF. Based on this, the constraints of nadir interference and transmit interference are updated for GEO SAR, and the effective time for the designed PRF is derived. PRF number required for imaging in one orbital period is analyzed.
This paper is written to extend on my previous paper, Nayyar (2004). This paper categorizes G-SQL that was presented in the previous paper as a Graph Manipulation Language (GML) for generation of graphs. This paper in...
详细信息
This paper is written to extend on my previous paper, Nayyar (2004). This paper categorizes G-SQL that was presented in the previous paper as a Graph Manipulation Language (GML) for generation of graphs. This paper introduces a new `Graph Definition Language for G-SQL' (GDL) and also updates GML to integrate with the new GDL. The purpose of the new Graph Definition Language (GDL) is to create a customized look and feel of graphs. It shall provide the user with the ability to define the UI components of a graph such as graph size, color of plotted values, graph title attributes etc.
暂无评论