Table 2.

The fitting analysis of secondary delay (100 km < d).

Ground Type	Mean (μs)	Standard (μs)	Maximum (μs)	Maximum in Military Standard (μs)
Seawater	−4.9830 × 10−16	0.0304	0.0915	0.02
Land with good conduction	−1.2401 × 10−15	0.0156	0.0334	0.05
Wet ground	−9.9587 × 10−16	0.0061	0.0991	0.1
Average Land	−1.3052 × 10−15	0.0237	0.0251	0.2
Dry land	−2.5275 × 10−15	0.0722	0.0763	0.2
Dryer Ground	−3.3674 × 10−15	0.0900	0.1065	0.2
Driest Ground	−3.1111 × 10−15	0.0659	0.1257	0.2