PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-07:28:10
G01     82.7           32.9                4.1 +/-    1.04       6.8 +/-    1.04  0.030 / 0.040
G07     130.7          39.1                7.2 +/-    0.85      10.6 +/-    0.85  0.040 / 0.050
G11     62.2           36.3                4.3 +/-    1.12       6.7 +/-    1.12  0.040 / 0.050
G13     288.9          36.5                6.4 +/-    1.70       9.8 +/-    1.70  0.050 / 0.060
G15     310.8          12.7                3.0 +/-    1.65       7.9 +/-    1.65  0.070 / 0.050
G17     220.0          61.4                7.3 +/-    1.42       8.1 +/-    1.42  0.060 / 0.040
G19     217.7          34.2                6.7 +/-    1.57      10.8 +/-    1.57  0.100 / 0.210
G28     2.6            60.9                2.9 +/-    0.55       3.3 +/-    0.55  0.150 / 0.260
G30     120.1          70.5                5.2 +/-    1.08       5.5 +/-    1.08  0.060 / 0.110