PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-04:12:40
G01     128.7          10.4               -6.7 +/-   36.81     -18.6 +/-   36.81  0.120 / 0.080
G07     47.4           69.4                4.7 +/-    0.40       5.0 +/-    0.40  0.090 / 0.050
G08     52.1           41.0                4.2 +/-    0.88       6.0 +/-    0.88  0.180 / 0.350
G09     178.8          38.9                7.8 +/-    1.15      11.5 +/-    1.15  0.120 / 0.180
G11     121.0          33.3                8.5 +/-    1.80      13.9 +/-    1.80  0.050 / 0.050
G17     199.5          13.8                3.3 +/-    2.69       8.6 +/-    2.69  0.050 / 0.050
G23     160.9          10.3                5.3 +/-    4.73      14.7 +/-    4.73  0.080 / 0.050
G28     274.0          52.3                5.4 +/-    2.84       6.6 +/-    2.84  0.070 / 0.050
G30     332.8          59.9                3.5 +/-    0.46       4.0 +/-    0.46  0.030 / 0.020