PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/28-06:58:00
G08     297.8          21.7                6.3 +/-    1.32      13.3 +/-    1.32  0.050 / 0.130
G10     2.2            62.9                3.7 +/-    0.47       4.1 +/-    0.47  0.060 / 0.110
G14     227.7          40.0                7.5 +/-    0.54      10.9 +/-    0.54  0.040 / 0.080
G20     75.0           41.5                5.7 +/-    0.95       8.1 +/-    0.95  0.040 / 0.080
G21     145.4          43.1                8.2 +/-    0.96      11.4 +/-    0.96  0.060 / 0.110
G24     57.8           26.3                4.9 +/-    0.61       9.3 +/-    0.61  0.060 / 0.110
G27     256.5          32.7                7.1 +/-    1.69      11.8 +/-    1.69  0.070 / 0.100
G32     243.2          67.9                8.1 +/-    0.88       8.7 +/-    0.88  0.060 / 0.100