PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/10-06:58:00
G01     54.3           27.9                1.8 +/-    1.84       3.3 +/-    1.84  0.040 / 0.040
G06     182.0          16.8                2.8 +/-    1.73       6.7 +/-    1.73  0.040 / 0.050
G07     144.6          16.3                4.5 +/-    3.27      10.8 +/-    3.27  0.040 / 0.020
G11     46.2           19.1                2.6 +/-    3.73       5.8 +/-    3.73  0.030 / 0.010
G13     257.2          32.6                2.9 +/-    2.04       4.8 +/-    2.04  0.120 / 0.230
G15     287.7          16.6                4.0 +/-    0.94       9.5 +/-    0.94  0.110 / 0.200
G17     293.5          79.3                5.9 +/-    0.71       6.0 +/-    0.71  0.120 / 0.270
G19     240.6          57.4                5.7 +/-    2.52       6.6 +/-    2.52  0.140 / 0.290
G28     46.3           54.2                5.0 +/-    0.79       6.0 +/-    0.79  0.080 / 0.130
G30     146.8          44.8                6.1 +/-    0.67       8.2 +/-    0.67  0.200 / 0.140