PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-12:42:30
G01     123.0          14.8                4.4 +/-    2.06      11.1 +/-    2.06  0.100 / 0.120
G07     73.1           66.2                4.0 +/-    0.63       4.3 +/-    0.63  0.080 / 0.110
G08     46.7           33.8                4.1 +/-    1.40       6.6 +/-    1.40  0.040 / 0.030
G09     175.7          28.9                5.7 +/-    1.23      10.3 +/-    1.23  0.030 / 0.030
G11     109.9          36.5                5.5 +/-    0.95       8.6 +/-    0.95  0.030 / 0.030
G13     320.5          13.6                1.4 +/-    2.59       3.5 +/-    2.59  0.030 / 0.030
G17     199.9          22.0                3.4 +/-    1.61       7.0 +/-    1.61  0.090 / 0.520
G28     284.5          55.2                3.7 +/-    2.54       4.4 +/-    2.54  0.180 / 0.380
G30     336.1          62.6                2.6 +/-    0.51       2.9 +/-    0.51  0.140 / 0.230