PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-14:43:00
G01     58.6           29.6                7.4 +/-    1.65      13.0 +/-    1.65  0.130 / 0.190
G07     141.8          18.3                8.6 +/-    1.45      19.7 +/-    1.45  0.090 / 0.170
G11     47.7           23.8                5.2 +/-    1.67      10.5 +/-    1.67  0.290 / 0.350
G13     260.6          35.9               11.9 +/-    1.96      18.6 +/-    1.96  0.130 / 0.520
G15     293.1          16.3                9.8 +/-    1.55      23.6 +/-    1.55  0.050 / 0.050
G17     253.0          74.1                9.5 +/-    0.43       9.8 +/-    0.43  0.050 / 0.050
G18     41.2           11.9                6.2 +/-    1.90      16.7 +/-    1.90  0.030 / 0.030
G19     232.5          52.7               10.1 +/-    2.29      12.4 +/-    2.29  0.030 / 0.030
G28     26.0           59.3                8.1 +/-    0.39       9.3 +/-    0.39  0.100 / 0.080
G30     144.0          50.6                8.6 +/-    0.69      10.8 +/-    0.69  0.100 / 0.060