PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-18:12:30
G02     67.6           28.0                5.7 +/-    1.61      10.3 +/-    1.61  0.030 / 0.050
G05     48.0           52.8                5.6 +/-    0.67       6.9 +/-    0.67  0.030 / 0.050
G12     180.3          18.1                8.9 +/-    1.55      20.6 +/-    1.55  0.080 / 0.220
G13     117.5          23.3               10.7 +/-    0.72      21.7 +/-    0.72  0.090 / 0.230
G15     161.5          19.7                9.7 +/-    2.22      21.6 +/-    2.22  0.120 / 0.310
G21     281.5          24.7                8.5 +/-    0.93      16.7 +/-    0.93  0.090 / 0.270
G25     219.3          41.3                7.4 +/-    1.26      10.5 +/-    1.26  0.060 / 0.090
G26     319.4          10.3              -21.1 +/-   12.31     -58.5 +/-   12.31  0.060 / 0.080
G29     336.2          66.0                6.3 +/-    0.90       6.8 +/-    0.90  0.080 / 0.250