PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/14-01:28:00
G01     85.8           32.7                3.8 +/-    1.49       6.3 +/-    1.49  0.040 / 0.040
G07     128.7          42.5                6.1 +/-    0.41       8.6 +/-    0.41  0.050 / 0.040
G11     67.1           39.8                4.1 +/-    1.08       5.9 +/-    1.08  0.060 / 0.080
G13     291.1          36.4                5.5 +/-    2.31       8.5 +/-    2.31  0.070 / 0.090
G15     312.1          12.1                5.5 +/-    1.64      14.6 +/-    1.64  0.090 / 0.090
G17     217.9          55.9                7.4 +/-    0.87       8.8 +/-    0.87  0.070 / 0.090
G19     216.5          30.9                6.1 +/-    2.06      10.5 +/-    2.06  0.050 / 0.030
G28     357.9          61.3                4.1 +/-    0.49       4.7 +/-    0.49  0.040 / 0.040