PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-08:42:50
G10     249.1          25.1                7.4 +/-    1.23      14.5 +/-    1.23  0.120 / 0.660
G13     55.6           31.4                4.1 +/-    1.16       7.0 +/-    1.16  0.130 / 0.640
G15     87.7           57.0                6.5 +/-    0.83       7.5 +/-    0.83  0.070 / 0.040
G16     297.8          15.2                0.5 +/-    1.50       1.3 +/-    1.50  0.060 / 0.040
G20     26.5           62.7                4.4 +/-    0.53       4.9 +/-    0.53  0.040 / 0.040
G21     332.9          59.8                3.8 +/-    0.69       4.3 +/-    0.69  0.030 / 0.040
G26     268.8          16.3                6.2 +/-    1.70      14.9 +/-    1.70  0.060 / 0.090
G29     164.0          51.2                8.5 +/-    0.50      10.6 +/-    0.50  0.060 / 0.100