PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-13:27:20
G02     201.8          27.6                8.4 +/-    1.99      15.5 +/-    1.99  0.090 / 0.300
G06     168.7          61.5                7.3 +/-    0.86       8.1 +/-    0.86  0.070 / 0.100
G12     304.2          10.3               -8.9 +/-    5.87     -24.6 +/-    5.87  0.080 / 0.150
G17     32.9           51.8                4.3 +/-    0.66       5.3 +/-    0.66  0.040 / 0.030
G19     352.5          67.9                3.1 +/-    0.71       3.3 +/-    0.71  0.050 / 0.040
G24     305.5          33.5                3.2 +/-    3.37       5.2 +/-    3.37  0.030 / 0.050
G28     96.9           34.6                6.1 +/-    1.49       9.8 +/-    1.49  0.040 / 0.050