PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-08:42:30
G02     81.2           14.2                3.6 +/-    2.66       9.1 +/-    2.66  0.070 / 0.070
G05     44.7           35.2                3.5 +/-    0.95       5.5 +/-    0.95  0.070 / 0.060
G13     104.9          31.4                6.8 +/-    0.94      11.6 +/-    0.94  0.090 / 0.110
G15     146.6          34.7                6.4 +/-    1.73      10.2 +/-    1.73  0.060 / 0.100
G20     253.1          80.2                4.5 +/-    0.36       4.5 +/-    0.36  0.050 / 0.040
G21     293.9          34.5                2.2 +/-    2.22       3.6 +/-    2.22  0.050 / 0.030
G25     212.7          30.1                4.4 +/-    2.41       7.7 +/-    2.41  0.060 / 0.110
G26     309.3          17.0                3.5 +/-    1.47       8.3 +/-    1.47  0.040 / 0.100
G29     359.6          82.3                5.5 +/-    0.68       5.6 +/-    0.68  0.170 / 0.280