PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/30-16:57:40
G08     300.7          21.6                5.6 +/-    1.17      11.9 +/-    1.17  0.060 / 0.080
G10     351.4          62.3                6.2 +/-    0.47       6.9 +/-    0.47  0.050 / 0.080
G14     224.7          40.1                9.8 +/-    1.43      14.3 +/-    1.43  0.040 / 0.020
G18     56.9           53.1                6.4 +/-    1.03       7.8 +/-    1.03  0.030 / 0.020
G21     141.8          42.2                9.1 +/-    0.66      12.8 +/-    0.66  0.050 / 0.100
G24     63.6           28.8                6.5 +/-    0.85      11.7 +/-    0.85  0.060 / 0.100
G27     260.5          34.6               10.0 +/-    2.02      16.1 +/-    2.02  0.080 / 0.040
G32     234.8          61.5                9.0 +/-    1.57      10.1 +/-    1.57  0.040 / 0.040