PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/07-20:58:00
G01     112.3          22.6               12.8 +/-    1.73      26.4 +/-    1.73  0.130 / 0.100
G07     96.9           62.6               13.1 +/-    0.69      14.6 +/-    0.69  0.080 / 0.120
G08     43.7           29.4               10.5 +/-    1.13      18.5 +/-    1.13  0.110 / 0.180
G09     176.4          19.3               13.9 +/-    2.50      31.0 +/-    2.50  0.110 / 0.160
G11     99.3           42.5               12.9 +/-    0.58      18.1 +/-    0.58  0.020 / 0.020
G13     313.8          24.6               11.5 +/-    1.03      22.6 +/-    1.03  0.020 / 0.040
G17     205.1          28.4               13.5 +/-    1.40      24.5 +/-    1.40  0.100 / 0.140
G18     86.9           23.3               10.8 +/-    1.70      21.9 +/-    1.70  0.110 / 0.170
G28     308.0          60.0               12.4 +/-    0.83      14.1 +/-    0.83  0.040 / 0.040
G30     12.6           75.6               13.9 +/-    0.46      14.3 +/-    0.46  0.030 / 0.040