PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-20:42:50
G01     56.7           29.2                8.6 +/-    1.21      15.3 +/-    1.21  0.080 / 0.290
G07     143.8          19.6               14.0 +/-    1.41      31.2 +/-    1.41  0.100 / 0.340
G11     47.3           22.0                8.0 +/-    1.18      16.8 +/-    1.18  0.090 / 0.230
G13     258.8          33.9               14.0 +/-    1.59      22.6 +/-    1.59  0.090 / 0.270
G15     290.9          16.3                9.7 +/-    2.01      23.5 +/-    2.01  0.060 / 0.090
G17     263.7          75.0               12.4 +/-    0.39      12.8 +/-    0.39  0.060 / 0.110
G18     40.6           11.0                8.8 +/-    1.26      24.0 +/-    1.26  0.040 / 0.050
G19     236.3          52.5               15.1 +/-    2.19      18.5 +/-    2.19  0.040 / 0.050
G28     41.8           55.4               10.8 +/-    0.39      12.8 +/-    0.39  0.090 / 0.230
G30     145.7          47.6               13.2 +/-    0.77      17.1 +/-    0.77  0.090 / 0.310