PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/28-09:57:50
G01     52.5           26.9                3.5 +/-    1.47       6.6 +/-    1.47  0.040 / 0.050
G06     180.2          20.4                6.1 +/-    1.17      13.2 +/-    1.17  0.030 / 0.040
G07     145.2          13.8                5.6 +/-    2.86      14.4 +/-    2.86  0.120 / 0.280
G11     45.2           16.4                1.6 +/-    1.04       3.8 +/-    1.04  0.120 / 0.260
G13     255.5          31.7                6.4 +/-    0.90      10.9 +/-    0.90  0.020 / 0.030
G15     286.7          16.3                3.8 +/-    2.00       9.3 +/-    2.00  0.020 / 0.020
G17     310.1          79.5                5.4 +/-    0.73       5.5 +/-    0.73  0.120 / 0.310
G19     243.6          59.4                7.4 +/-    0.64       8.5 +/-    0.64  0.140 / 0.360
G28     49.1           53.6                2.8 +/-    0.33       3.4 +/-    0.33  0.050 / 0.110
G30     148.1          44.5                7.5 +/-    1.11      10.2 +/-    1.11  0.070 / 0.100