The goal of this study was to determine the effect of unit placement on signal integrity and measurement output obtained during reliability trials for global positioning system (GPS) devices. Two of the same model GPS units were worn in four separate unit configurations (Piggyback, Above-Below, Front-Back and Lateral) during 4 × 2 lap repeats of a team sport simulation circuit. Differences in signal integrity indicators (# satellites, horizontal dilution of precision (HDoP), signal-to-noise ratio (SNR) and signal strength (SS)), total distance covered in each lap, and distance covered above and below 3 m·s⁻¹, were compared between the two units. The results showed that for signal integrity measures, differences between units were negligible for Above-Below and Lateral, but comparatively high for Piggyback and Front-Back. For distance measures, values were similar between units for Above-Below, however, discrepancies occurred in both total distance and speed distribution for the other configurations. This study concluded that the Above-Below unit configuration yielded the smallest differences between units for signal integrity and measurement output. Therefore, the Above-Below configuration is recommended for future GPS reliability investigations.

这项研究的目的是确定在全球定位系统（GPS）设备的可靠性试验期间，单元放置对信号完整性和测量输出的影响。在团队运动模拟电路的4×2圈重复过程中，两个相同型号的GPS单元分别以四个单独的单元配置（背负，上下，前后和横向）佩戴。信号完整性指标的差异（＃个卫星，精度水平稀释（HDoP），信噪比（SNR）和信号强度（SS）），每圈中的总距离以及3 m。以上和以下的距离s ^-1，在两个单位之间进行了比较。结果表明，对于信号完整性度量，上下之间和横向的单位之间的差异可以忽略不计，而背and式和前后式的单位之间的差异可以忽略不计。对于距离度量，上下单位之间的值相似，但是，其他配置的总距离和速度分布均出现差异。这项研究得出的结论是，上下单位配置在信号完整性和测量输出的单位之间产生了最小的差异。因此，建议将“以下”配置用于将来的GPS可靠性研究。