PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-07:12:40
G01     40.6           15.3                2.5 +/-    1.88       6.2 +/-    1.88  0.050 / 0.080
G02     198.8          10.7               -0.6 +/-    3.31      -1.7 +/-    3.31  0.050 / 0.070
G06     179.1          36.3                6.8 +/-    1.58      10.6 +/-    1.58  0.110 / 0.220
G13     237.8          21.2                5.3 +/-    1.72      11.3 +/-    1.72  0.190 / 0.210
G15     269.1          12.1                5.4 +/-    1.90      14.4 +/-    1.90  0.020 / 0.020
G17     6.4            68.8                4.1 +/-    0.45       4.4 +/-    0.45  0.020 / 0.030
G19     285.1          70.6                5.0 +/-    0.43       5.3 +/-    0.43  0.070 / 0.080
G24     316.6          19.2                2.6 +/-    1.40       5.7 +/-    1.40  0.070 / 0.080
G28     74.2           45.6                5.0 +/-    1.38       6.7 +/-    1.38  0.160 / 0.270
G30     154.4          24.7                6.8 +/-    1.54      13.4 +/-    1.54  0.180 / 0.250