PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-04:13:00
G01     128.7          10.4              -16.8 +/-   29.32     -46.4 +/-   29.32  0.060 / 0.070
G07     47.4           69.4                4.4 +/-    0.62       4.7 +/-    0.62  0.050 / 0.080
G08     52.1           41.0                4.9 +/-    0.49       7.0 +/-    0.49  0.040 / 0.040
G09     178.8          38.9                9.0 +/-    1.30      13.4 +/-    1.30  0.030 / 0.040
G11     121.0          33.3                9.4 +/-    0.65      15.5 +/-    0.65  0.040 / 0.040
G17     199.5          13.8                3.3 +/-    2.11       8.3 +/-    2.11  0.040 / 0.040
G23     160.9          10.3                5.8 +/-    3.53      16.2 +/-    3.53  0.070 / 0.260
G28     274.0          52.3                4.9 +/-    0.86       6.0 +/-    0.86  0.100 / 0.280
G30     332.8          59.9                4.6 +/-    0.90       5.2 +/-    0.90  0.150 / 0.000