PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-19:42:50
G01     57.9           29.8               10.8 +/-    0.38      19.0 +/-    0.38  0.070 / 0.120
G07     143.3          20.7               13.1 +/-    1.92      28.3 +/-    1.92  0.060 / 0.150
G11     47.6           22.7                9.6 +/-    0.95      19.8 +/-    0.95  0.090 / 0.390
G13     260.1          34.4               14.9 +/-    1.19      23.9 +/-    1.19  0.090 / 0.380
G15     292.4          16.2               10.6 +/-    2.42      25.6 +/-    2.42  0.050 / 0.040
G17     260.9          75.0               13.3 +/-    0.48      13.7 +/-    0.48  0.040 / 0.050
G18     41.2           11.7                9.7 +/-    1.88      26.0 +/-    1.88  0.080 / 0.240
G19     234.8          51.0               14.2 +/-    0.85      17.7 +/-    0.85  0.080 / 0.200
G28     39.7           55.9               11.3 +/-    0.96      13.3 +/-    0.96  0.040 / 0.050
G30     145.0          49.4               14.2 +/-    1.16      18.1 +/-    1.16  0.040 / 0.060