PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/25-07:28:10
G01     128.7          10.3              -19.4 +/-   24.06     -53.9 +/-   24.06  0.020 / 0.030
G07     49.5           69.0                3.0 +/-    0.49       3.2 +/-    0.49  0.020 / 0.030
G08     51.6           40.0                3.3 +/-    0.91       4.8 +/-    0.91  0.050 / 0.070
G09     177.8          37.9                6.9 +/-    0.86      10.4 +/-    0.86  0.060 / 0.080
G11     119.6          33.1                5.3 +/-    0.56       8.7 +/-    0.56  0.150 / 0.280
G17     199.1          14.6                1.9 +/-    3.16       4.7 +/-    3.16  0.250 / 0.310
G23     161.2          11.1                2.5 +/-    1.63       6.9 +/-    1.63  0.040 / 0.060
G28     273.7          52.1                5.0 +/-    1.02       6.2 +/-    1.02  0.030 / 0.050
G30     330.4          58.3                2.3 +/-    0.68       2.7 +/-    0.68  0.060 / 0.080