PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-21:42:50
G01     52.0           26.8               11.9 +/-    1.61      22.3 +/-    1.61  0.130 / 0.380
G06     178.0          23.2               18.6 +/-    1.47      38.0 +/-    1.47  0.110 / 0.500
G07     145.6          15.0               18.2 +/-    3.20      45.3 +/-    3.20  0.080 / 0.130
G11     45.7           18.2                9.3 +/-    1.02      21.3 +/-    1.02  0.090 / 0.100
G13     253.3          31.5               14.9 +/-    1.19      25.3 +/-    1.19  0.030 / 0.050
G15     285.8          16.0               12.5 +/-    2.52      30.3 +/-    2.52  0.030 / 0.060
G17     282.3          76.6               14.6 +/-    1.03      15.0 +/-    1.03  0.160 / 0.180
G19     242.9          57.1               15.5 +/-    1.11      18.1 +/-    1.11  0.150 / 0.240
G28     49.6           53.5               12.4 +/-    0.43      15.0 +/-    0.43  0.070 / 0.250
G30     148.3          42.1               16.6 +/-    0.58      23.3 +/-    0.58  0.080 / 0.260