PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-14:12:50
G01     117.3          19.2                9.5 +/-    1.57      21.4 +/-    1.57  0.030 / 0.040
G07     85.5           65.6                9.9 +/-    0.28      10.8 +/-    0.28  0.040 / 0.040
G08     44.1           29.4                7.0 +/-    0.81      12.3 +/-    0.81  0.160 / 0.230
G09     175.7          22.7               11.0 +/-    1.30      22.6 +/-    1.30  0.120 / 0.180
G11     103.6          40.7               10.5 +/-    0.97      15.1 +/-    0.97  0.040 / 0.060
G13     316.6          21.1                5.4 +/-    1.71      11.5 +/-    1.71  0.040 / 0.060
G17     202.2          26.3               10.0 +/-    1.29      18.9 +/-    1.29  0.030 / 0.050
G18     91.9           21.6                9.0 +/-    0.69      19.1 +/-    0.69  0.030 / 0.040
G28     296.3          58.1                8.3 +/-    1.05       9.6 +/-    1.05  0.050 / 0.080
G30     348.8          69.9                8.0 +/-    1.03       8.5 +/-    1.03  0.050 / 0.080