PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-13:13:10
G01     99.2           28.9                5.6 +/-    0.78      10.0 +/-    0.78  0.060 / 0.150
G07     117.5          49.5                6.6 +/-    0.81       8.4 +/-    0.81  0.080 / 0.140
G08     41.7           12.5                4.0 +/-    2.48      10.5 +/-    2.48  0.030 / 0.030
G11     76.9           40.0                5.6 +/-    0.85       8.1 +/-    0.85  0.030 / 0.040
G13     305.1          31.1                7.1 +/-    2.11      12.2 +/-    2.11  0.030 / 0.110
G17     208.7          47.8                8.1 +/-    1.54      10.5 +/-    1.54  0.030 / 0.070
G19     211.0          21.2                5.9 +/-    1.37      12.6 +/-    1.37  0.030 / 0.060
G28     333.0          61.6                4.0 +/-    0.68       4.4 +/-    0.68  0.040 / 0.060
G30     50.6           80.0                5.2 +/-    0.59       5.3 +/-    0.59  0.060 / 0.150