PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-15:57:50
G01     55.7           28.4                7.6 +/-    0.92      13.7 +/-    0.92  0.050 / 0.120
G06     179.0          19.2               11.0 +/-    1.30      24.6 +/-    1.30  0.040 / 0.110
G07     143.6          15.2                9.4 +/-    2.25      23.2 +/-    2.25  0.030 / 0.030
G11     45.8           17.5                7.2 +/-    1.22      16.8 +/-    1.22  0.030 / 0.030
G13     259.8          33.3               12.0 +/-    1.56      19.7 +/-    1.56  0.120 / 0.150
G15     293.2          15.5                8.5 +/-    2.47      20.8 +/-    2.47  0.160 / 0.230
G17     291.5          80.0               12.7 +/-    0.61      12.9 +/-    0.61  0.040 / 0.060
G19     238.5          56.7               11.9 +/-    1.21      14.0 +/-    1.21  0.040 / 0.050
G28     42.7           55.2                9.2 +/-    0.67      10.9 +/-    0.67  0.090 / 0.140
G30     146.3          50.4               11.3 +/-    0.77      14.2 +/-    0.77  0.070 / 0.170