PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/28-12:13:10
G01     110.2          23.6                4.1 +/-    1.91       8.2 +/-    1.91  0.030 / 0.030
G07     103.0          58.1                4.2 +/-    0.49       4.9 +/-    0.49  0.030 / 0.030
G08     42.1           21.4                3.2 +/-    1.32       6.7 +/-    1.32  0.030 / 0.040
G09     173.6          14.4                5.6 +/-    1.48      14.1 +/-    1.48  0.030 / 0.040
G11     91.4           40.7                3.9 +/-    0.67       5.7 +/-    0.67  0.080 / 0.230
G13     313.5          24.5                4.0 +/-    2.33       8.0 +/-    2.33  0.090 / 0.270
G17     203.8          36.8                6.3 +/-    1.85       9.7 +/-    1.85  0.070 / 0.180
G19     207.9          11.4                0.7 +/-   11.78       1.9 +/-   11.78  0.080 / 0.200
G28     311.6          60.2                4.5 +/-    0.91       5.1 +/-    0.91  0.060 / 0.090
G30     3.4            74.7                4.7 +/-    0.46       4.8 +/-    0.46  0.060 / 0.090