PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-20:42:50
G01     75.8           33.3               12.9 +/-    1.18      21.1 +/-    1.18  0.110 / 0.280
G07     134.9          35.3               15.7 +/-    1.83      24.8 +/-    1.83  0.070 / 0.330
G11     57.8           34.6               13.5 +/-    0.96      21.6 +/-    0.96  0.080 / 0.090
G13     280.1          37.7               14.5 +/-    1.99      21.9 +/-    1.99  0.070 / 0.090
G15     306.2          14.3               10.4 +/-    3.50      26.3 +/-    3.50  0.050 / 0.080
G17     226.4          60.8               14.8 +/-    1.57      16.7 +/-    1.57  0.060 / 0.080
G18     52.8           20.4               12.2 +/-    6.94      26.7 +/-    6.94  0.390 / 0.360
G19     221.3          37.2               14.9 +/-    1.55      22.8 +/-    1.55  0.250 / 0.300
G28     12.8           60.1               13.6 +/-    1.25      15.4 +/-    1.25  0.040 / 0.030
G30     130.6          64.2               15.7 +/-    0.65      17.2 +/-    0.65  0.030 / 0.030