PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-06:57:50
G01     51.0           26.0                3.9 +/-    3.34       7.5 +/-    3.34  0.040 / 0.040
G06     181.4          20.2                5.8 +/-    1.14      12.7 +/-    1.14  0.040 / 0.050
G07     145.9          12.9                6.2 +/-    1.27      16.2 +/-    1.27  0.020 / 0.020
G11     45.1           16.1                3.8 +/-    2.00       9.3 +/-    2.00  0.020 / 0.020
G13     253.1          30.8                5.6 +/-    2.34       9.7 +/-    2.34  0.100 / 0.170
G15     284.1          16.2                5.7 +/-    2.00      13.8 +/-    2.00  0.110 / 0.160
G17     314.6          78.9                5.3 +/-    0.47       5.3 +/-    0.47  0.120 / 0.150
G19     246.3          60.5                6.3 +/-    0.64       7.1 +/-    0.64  0.110 / 0.160
G28     52.0           52.8                4.2 +/-    1.36       5.1 +/-    1.36  0.070 / 0.180
G30     148.7          40.9                8.1 +/-    1.18      11.6 +/-    1.18  0.070 / 0.140