PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-10:13:10
G01     320.5          13.5                3.4 +/-    1.18       8.8 +/-    1.18  0.040 / 0.050
G08     265.8          15.5                7.3 +/-    2.33      17.9 +/-    2.33  0.040 / 0.060
G10     71.0           56.1                5.2 +/-    1.33       6.1 +/-    1.33  0.030 / 0.040
G11     308.6          19.2                5.7 +/-    2.29      12.8 +/-    2.29  0.030 / 0.030
G14     273.9          65.8                4.3 +/-    0.64       4.6 +/-    0.64  0.140 / 0.380
G18     309.4          35.5                5.6 +/-    1.28       8.8 +/-    1.28  0.110 / 0.360
G21     155.4          10.0                2.9 +/-    1.13       8.1 +/-    1.13  0.160 / 0.260
G27     227.2          11.9                3.1 +/-    2.82       8.3 +/-    2.82  0.150 / 0.230
G31     175.5          38.1                6.1 +/-    1.50       9.1 +/-    1.50  0.110 / 0.200
G32     0.6            70.1                7.1 +/-    0.67       7.5 +/-    0.67  0.120 / 0.270