PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-17:57:40
G01     110.6          23.7               13.1 +/-    2.44      26.4 +/-    2.44  0.030 / 0.030
G07     100.5          61.3               11.9 +/-    0.81      13.4 +/-    0.81  0.030 / 0.040
G08     42.7           25.3                9.9 +/-    1.06      19.3 +/-    1.06  0.070 / 0.130
G09     175.5          16.9               14.9 +/-    2.36      35.3 +/-    2.36  0.050 / 0.120
G11     95.1           42.7               12.8 +/-    0.74      17.9 +/-    0.74  0.030 / 0.040
G13     312.3          26.2               13.3 +/-    1.68      25.2 +/-    1.68  0.030 / 0.040
G17     205.3          31.5               15.8 +/-    1.54      26.9 +/-    1.54  0.040 / 0.080
G18     84.6           23.7                9.5 +/-    0.66      19.1 +/-    0.66  0.040 / 0.070
G28     311.2          60.3               12.6 +/-    0.68      14.3 +/-    0.68  0.080 / 0.190
G30     12.5           76.2               12.5 +/-    0.68      12.8 +/-    0.68  0.110 / 0.180