PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-04:28:00
G01     277.1          41.5                3.5 +/-    1.13       5.0 +/-    1.13  0.060 / 0.050
G03     314.7          23.9                2.8 +/-    1.10       5.5 +/-    1.10  0.050 / 0.050
G10     127.0          20.3                4.6 +/-    0.71      10.0 +/-    0.71  0.050 / 0.080
G11     253.6          22.1                5.5 +/-    4.01      11.6 +/-    4.01  0.050 / 0.080
G14     36.5           53.6                4.8 +/-    0.78       5.8 +/-    0.78  0.040 / 0.080
G18     238.7          42.1                6.6 +/-    2.36       9.3 +/-    2.36  0.040 / 0.070
G22     314.5          46.7                2.5 +/-    1.09       3.3 +/-    1.09  0.130 / 0.390
G25     55.9           17.4                0.0 +/-    0.55       0.1 +/-    0.55  0.140 / 0.370
G31     64.3           75.3                5.0 +/-    0.97       5.1 +/-    0.97  0.070 / 0.130
G32     61.4           33.7                3.1 +/-    1.35       5.0 +/-    1.35  0.070 / 0.120