PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/29-14:13:10
G07     17.5           68.4                5.7 +/-    0.67       6.1 +/-    0.67  0.030 / 0.040
G08     62.4           47.9                6.3 +/-    0.44       8.1 +/-    0.44  0.030 / 0.030
G09     178.6          47.7                9.1 +/-    1.64      11.8 +/-    1.64  0.040 / 0.060
G11     129.4          28.1                8.7 +/-    1.42      15.8 +/-    1.42  0.040 / 0.060
G18     113.9          10.6               -2.9 +/-   29.33      -8.0 +/-   29.33  0.040 / 0.060
G23     159.5          16.8                8.3 +/-    3.19      19.8 +/-    3.19  0.040 / 0.070
G27     40.2           16.5                5.2 +/-    0.82      12.4 +/-    0.82  0.100 / 0.210
G28     259.9          46.0                7.5 +/-    0.89      10.0 +/-    0.89  0.110 / 0.190
G30     320.7          50.9                7.3 +/-    1.04       9.1 +/-    1.04  0.090 / 0.200