PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-13:57:50
G01     111.7          22.9               11.3 +/-    0.98      23.2 +/-    0.98  0.030 / 0.040
G07     98.6           61.8                9.3 +/-    0.58      10.5 +/-    0.58  0.030 / 0.030
G08     42.4           23.8                5.7 +/-    1.13      11.5 +/-    1.13  0.100 / 0.190
G09     174.7          16.6               10.0 +/-    1.35      23.8 +/-    1.35  0.100 / 0.180
G11     94.9           42.2               10.5 +/-    0.54      14.7 +/-    0.54  0.030 / 0.040
G13     313.0          25.6                8.5 +/-    1.79      16.4 +/-    1.79  0.030 / 0.040
G17     204.0          32.9               10.9 +/-    1.66      17.9 +/-    1.66  0.050 / 0.090
G18     85.3           23.3                7.4 +/-    0.82      15.1 +/-    0.82  0.040 / 0.090
G28     308.0          59.9                8.8 +/-    1.03      10.0 +/-    1.03  0.050 / 0.050
G30     2.3            74.6                9.8 +/-    0.56      10.1 +/-    0.56  0.040 / 0.060