PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-21:27:50
G01     56.7           29.2               11.0 +/-    1.10      19.6 +/-    1.10  0.080 / 0.360
G07     143.8          19.6               15.6 +/-    1.74      34.8 +/-    1.74  0.110 / 0.370
G11     47.4           22.2                9.9 +/-    1.12      20.6 +/-    1.12  0.060 / 0.090
G13     258.9          33.9               14.2 +/-    1.43      23.1 +/-    1.43  0.070 / 0.120
G15     290.6          16.4               10.9 +/-    2.68      26.3 +/-    2.68  0.080 / 0.180
G17     262.2          74.5               15.3 +/-    0.82      15.8 +/-    0.82  0.080 / 0.230
G18     40.6           11.1               10.1 +/-    1.17      27.5 +/-    1.17  0.080 / 0.230
G19     236.4          52.8               16.0 +/-    1.02      19.6 +/-    1.02  0.080 / 0.240
G28     41.9           55.4               12.7 +/-    0.50      15.1 +/-    0.50  0.040 / 0.060
G30     145.6          47.3               16.4 +/-    1.19      21.4 +/-    1.19  0.040 / 0.070