PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-13:27:50
G08     292.2          21.8                2.8 +/-    1.41       6.0 +/-    1.41  0.080 / 0.100
G10     15.1           63.2                3.8 +/-    0.46       4.2 +/-    0.46  0.090 / 0.100
G14     233.4          48.0                6.4 +/-    1.18       8.2 +/-    1.18  0.140 / 0.240
G21     147.8          34.5                4.3 +/-    0.92       6.9 +/-    0.92  0.290 / 0.320
G24     53.2           24.2                3.0 +/-    0.95       6.0 +/-    0.95  0.040 / 0.110
G27     249.3          29.4                3.5 +/-    1.81       6.2 +/-    1.81  0.050 / 0.110
G31     182.6          10.4               -6.0 +/-   10.84     -16.7 +/-   10.84  0.060 / 0.070
G32     256.6          71.5                5.1 +/-    0.59       5.3 +/-    0.59  0.040 / 0.080