PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/11-17:42:50
G07     338.2          60.1               12.5 +/-    0.47      14.2 +/-    0.47  0.030 / 0.030
G08     102.3          50.6               15.5 +/-    1.03      19.4 +/-    1.03  0.030 / 0.030
G09     201.5          77.6               12.7 +/-    0.31      12.9 +/-    0.31  0.030 / 0.050
G11     146.4          12.3               15.0 +/-    1.44      39.7 +/-    1.44  0.030 / 0.040
G16     45.6           12.8                8.9 +/-    4.40      23.4 +/-    4.40  0.130 / 0.230
G23     154.6          45.2               15.4 +/-    1.04      20.7 +/-    1.04  0.200 / 0.200
G27     59.7           34.3               12.5 +/-    1.99      20.1 +/-    1.99  0.070 / 0.070
G28     233.8          23.1               12.5 +/-    1.34      25.6 +/-    1.34  0.060 / 0.070
G30     300.3          34.4               11.5 +/-    1.53      18.4 +/-    1.53  0.080 / 0.120