PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-10:27:40
G02     68.0           24.7                5.8 +/-    1.07      11.4 +/-    1.07  0.030 / 0.030
G05     49.1           52.1                4.1 +/-    0.56       5.0 +/-    0.56  0.030 / 0.040
G12     184.4          24.6                6.2 +/-    1.26      12.3 +/-    1.26  0.100 / 0.150
G13     121.8          21.2                5.7 +/-    1.40      12.2 +/-    1.40  0.080 / 0.250
G15     157.4          20.1                6.5 +/-    1.41      14.2 +/-    1.41  0.130 / 0.100
G18     220.6          11.1               -4.0 +/-   10.00     -10.9 +/-   10.00  0.110 / 0.150
G20     216.7          65.3                5.9 +/-    0.92       6.4 +/-    0.92  0.040 / 0.030
G21     279.9          25.6                3.8 +/-    2.04       7.3 +/-    2.04  0.030 / 0.030
G25     226.2          45.0                4.3 +/-    2.95       5.7 +/-    2.95  0.060 / 0.120
G29     337.2          65.8                4.9 +/-    0.63       5.3 +/-    0.63  0.090 / 0.110