PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-15:27:50
G01     110.0          24.0               12.1 +/-    1.91      24.3 +/-    1.91  0.060 / 0.130
G07     101.9          60.6               12.3 +/-    0.85      13.9 +/-    0.85  0.260 / 0.180
G08     42.3           23.1                8.8 +/-    1.79      18.0 +/-    1.79  0.030 / 0.030
G09     174.8          15.4               12.1 +/-    2.21      29.7 +/-    2.21  0.030 / 0.030
G11     93.0           42.6               11.8 +/-    1.02      16.5 +/-    1.02  0.030 / 0.030
G13     311.8          26.8               10.2 +/-    1.00      19.2 +/-    1.00  0.040 / 0.020
G17     205.0          33.9               13.4 +/-    1.42      21.7 +/-    1.42  0.070 / 0.110
G18     83.5           23.8                8.9 +/-    2.16      17.9 +/-    2.16  0.090 / 0.080
G28     311.9          60.4               10.3 +/-    1.09      11.7 +/-    1.09  0.190 / 0.310
G30     10.3           76.2               12.2 +/-    0.62      12.5 +/-    0.62  0.190 / 0.250