PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-10:12:40
G01     320.9          11.6               -4.1 +/-   27.81     -11.1 +/-   27.81  0.040 / 0.070
G08     268.0          16.4                7.2 +/-    2.57      17.2 +/-    2.57  0.040 / 0.060
G10     67.0           57.2                4.8 +/-    0.56       5.5 +/-    0.56  0.280 / 0.180
G11     310.3          17.9                4.8 +/-    1.32      11.2 +/-    1.32  0.240 / 0.150
G14     268.8          64.6                5.1 +/-    0.61       5.6 +/-    0.61  0.110 / 0.210
G18     310.9          33.6                6.2 +/-    2.80      10.1 +/-    2.80  0.120 / 0.230
G21     155.1          12.1                3.7 +/-    3.05       9.9 +/-    3.05  0.030 / 0.010
G27     228.9          13.4                2.2 +/-   21.30       5.7 +/-   21.30  0.030 / 0.010
G31     176.1          35.6                8.3 +/-    0.94      13.0 +/-    0.94  0.230 / 0.130
G32     354.9          71.7                3.9 +/-    0.48       4.1 +/-    0.48  0.240 / 0.130