PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/09-06:27:50
G01     71.1           32.9                2.4 +/-    1.12       4.0 +/-    1.12  0.040 / 0.040
G07     137.2          30.7                5.9 +/-    0.58      10.2 +/-    0.58  0.030 / 0.040
G11     54.4           30.9                3.2 +/-    1.92       5.4 +/-    1.92  0.090 / 0.240
G13     276.5          37.0                3.4 +/-    2.40       5.3 +/-    2.40  0.110 / 0.220
G15     302.4          15.6                0.9 +/-    1.41       2.1 +/-    1.41  0.030 / 0.030
G17     233.8          70.0                6.2 +/-    0.35       6.5 +/-    0.35  0.030 / 0.020
G19     224.1          43.1                6.1 +/-    2.40       8.4 +/-    2.40  0.040 / 0.080
G28     20.4           59.0                2.7 +/-    2.56       3.1 +/-    2.56  0.060 / 0.090
G30     134.7          60.6                6.9 +/-    0.57       7.8 +/-    0.57  0.050 / 0.070