PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-13:13:10
G02     203.4          25.7                3.5 +/-    1.49       6.8 +/-    1.49  0.060 / 0.060
G06     162.9          64.7                5.0 +/-    0.46       5.5 +/-    0.46  0.070 / 0.080
G12     305.7          14.5                1.5 +/-    1.01       3.8 +/-    1.01  0.090 / 0.240
G17     32.9           51.6                4.8 +/-    1.37       5.9 +/-    1.37  0.130 / 0.260
G19     335.5          68.7                4.0 +/-    0.48       4.2 +/-    0.48  0.030 / 0.020
G24     300.8          37.4                3.1 +/-    1.14       4.7 +/-    1.14  0.030 / 0.030
G28     97.1           35.1                6.6 +/-    0.73      10.5 +/-    0.73  0.030 / 0.030