中文摘要：

合理的GPS观测量随机模型可有效地提高GPS测量精度，但对单历元模糊度搜索影响还未知。通过利用等权模型、高度角模型及信号强度模型对两组实验数据进行单历元处理分析，结果表明：高度角模型及信号强度模型都可有效地提高单历元模糊度搜索的成功率，当观测环境较差时信号强度模型要优于高度角模型。

英文摘要：

The suitable GPS stochastic model can improve the accuracy of GPS surveying. However, its effect on single epoch ambiguity resolution is unknown. The unit model, satellite elevation model and signal strength model were used in two tests with single epoch data processing method. The results show that both the satellite elevation model and signal strength model can improve the success rate, and the later is better when there are many obstacles around the GPS antenna.