PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-03:58:10
G01     125.0          13.4                9.6 +/-    2.18      24.7 +/-    2.18  0.110 / 0.070
G07     61.4           68.7                5.2 +/-    0.59       5.5 +/-    0.59  0.080 / 0.070
G08     48.7           37.4                4.6 +/-    1.19       7.0 +/-    1.19  0.210 / 0.250
G09     178.3          33.9                8.5 +/-    1.43      13.8 +/-    1.43  0.140 / 0.340
G11     116.2          36.0                8.5 +/-    0.67      13.3 +/-    0.67  0.030 / 0.050
G13     320.9          12.5                2.0 +/-    5.63       5.3 +/-    5.63  0.060 / 0.040
G17     200.1          18.2                3.9 +/-    1.58       9.0 +/-    1.58  0.250 / 0.330
G28     281.5          54.7                3.4 +/-    3.28       4.1 +/-    3.28  0.150 / 0.330
G30     339.3          63.9                4.0 +/-    0.56       4.4 +/-    0.56  0.100 / 0.100