这篇文章讲解ns2中trace文件，讲解的比较清楚，值得看看,This article on the trace file in ns2, the more clearly explain, it is worth to see

NS-2编程的学习文档汇编，适合入门级，包含了NS2无线模拟的Trace文件格式，NS2 进行无线模拟时 调用的类和函数并且有详细的otcl机制的说明．-NS-2 program of study document compilation, suitable for entry-level, contains the NS2 Wireless Trace file formats simulation, NS2 wireless simulation called classes and fun

this document contains how to use NS2, Writimg tcl scr ipt for your application, Understanding a tcl scr ipt for “Mobile ad hoc network and How to analyze the routing of AODV using the trace file.