PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-05:58:10
G01     66.9           32.3                6.0 +/-    1.22      10.1 +/-    1.22  0.040 / 0.040
G07     139.2          27.5                9.0 +/-    1.23      16.7 +/-    1.23  0.050 / 0.050
G11     52.1           28.6                5.1 +/-    1.46       9.1 +/-    1.46  0.030 / 0.030
G13     271.8          36.6                4.8 +/-    1.84       7.4 +/-    1.84  0.040 / 0.020
G15     299.1          16.3                3.2 +/-    2.17       7.7 +/-    2.17  0.130 / 0.230
G17     241.6          72.8                6.8 +/-    0.52       7.1 +/-    0.52  0.090 / 0.200
G19     227.1          46.4                5.6 +/-    2.20       7.5 +/-    2.20  0.050 / 0.080
G28     26.7           58.1                8.1 +/-    1.06       9.4 +/-    1.06  0.060 / 0.070
G30     138.2          56.7                7.8 +/-    0.75       9.2 +/-    0.75  0.040 / 0.080