PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/24-11:27:50
G01     112.9          22.1                2.7 +/-    2.45       5.6 +/-    2.45  0.020 / 0.030
G07     96.4           62.3                4.6 +/-    0.67       5.1 +/-    0.67  0.020 / 0.020
G08     42.3           23.3                3.2 +/-    2.14       6.6 +/-    2.14  0.040 / 0.040
G09     174.2          16.9                5.8 +/-    2.20      13.7 +/-    2.20  0.030 / 0.040
G11     95.5           41.8                4.3 +/-    1.05       6.1 +/-    1.05  0.090 / 0.110
G13     313.7          24.9                2.3 +/-    1.14       4.5 +/-    1.14  0.090 / 0.120
G17     202.9          33.3                3.6 +/-    0.93       5.9 +/-    0.93  0.120 / 0.230
G18     86.2           22.9                2.3 +/-    1.92       4.7 +/-    1.92  0.100 / 0.210
G28     305.2          59.5                2.8 +/-    1.63       3.2 +/-    1.63  0.120 / 0.130
G30     355.9          73.1                4.2 +/-    0.83       4.4 +/-    0.83  0.100 / 0.150