PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/06-17:57:50
G01     112.8          21.5               11.4 +/-    2.00      24.2 +/-    2.00  0.050 / 0.060
G07     101.4          56.7               12.0 +/-    1.14      14.0 +/-    1.14  0.050 / 0.060
G08     42.8           25.7               10.4 +/-    2.59      20.0 +/-    2.59  0.040 / 0.040
G09     176.7          21.1               10.4 +/-    1.55      22.4 +/-    1.55  0.040 / 0.040
G11     96.6           42.4               12.5 +/-    0.75      17.5 +/-    0.75  0.030 / 0.030
G13     313.8          25.1               10.2 +/-    1.14      19.9 +/-    1.14  0.030 / 0.030
G17     202.7          31.1               11.5 +/-    1.34      19.7 +/-    1.34  0.080 / 0.160
G18     85.4           22.6               11.2 +/-    1.84      23.2 +/-    1.84  0.080 / 0.200
G28     296.7          56.9               10.9 +/-    0.86      12.8 +/-    0.86  0.110 / 0.210
G30     8.2            75.1               11.6 +/-    0.60      12.0 +/-    0.60  0.100 / 0.200