PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/16-14:58:00
G01     55.5           28.3                6.9 +/-    1.61      12.5 +/-    1.61  0.100 / 0.060
G07     143.1          15.4                9.5 +/-    2.58      23.5 +/-    2.58  0.070 / 0.060
G11     46.5           21.2                7.0 +/-    3.59      14.9 +/-    3.59  0.040 / 0.050
G13     256.9          34.6               11.4 +/-    1.53      18.2 +/-    1.53  0.040 / 0.050
G15     290.1          16.3                8.5 +/-    2.17      20.4 +/-    2.17  0.080 / 0.170
G17     264.4          76.1               10.7 +/-    0.40      11.0 +/-    0.40  0.070 / 0.150
G18     39.4           9.8                 6.3 +/-    1.61      17.6 +/-    1.61  0.040 / 0.030
G19     236.2          55.4               11.4 +/-    2.37      13.5 +/-    2.37  0.030 / 0.030
G28     31.7           58.5                8.2 +/-    0.87       9.5 +/-    0.87  0.110 / 0.250
G30     145.9          47.3                9.7 +/-    1.44      12.7 +/-    1.44  0.140 / 0.350