PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/28-18:57:50
G01     66.0           32.2               14.4 +/-    0.49      24.2 +/-    0.49  0.080 / 0.370
G07     139.8          27.6               18.3 +/-    1.80      33.7 +/-    1.80  0.080 / 0.350
G11     51.4           28.3               12.4 +/-    0.92      22.5 +/-    0.92  0.050 / 0.120
G13     269.3          36.8               17.9 +/-    1.28      27.5 +/-    1.28  0.050 / 0.120
G15     299.6          15.6               12.8 +/-    1.89      31.4 +/-    1.89  0.040 / 0.050
G17     240.2          69.9               18.9 +/-    0.60      20.0 +/-    0.60  0.040 / 0.050
G18     46.1           16.2               11.5 +/-    0.93      27.8 +/-    0.93  0.060 / 0.150
G19     227.4          44.0               20.0 +/-    2.36      27.3 +/-    2.36  0.060 / 0.160
G28     27.1           58.2               14.8 +/-    0.79      17.0 +/-    0.79  0.030 / 0.040
G30     139.5          57.2               17.7 +/-    1.21      20.6 +/-    1.21  0.030 / 0.040