PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-05:43:00
G01     73.4           33.1                3.3 +/-    0.83       5.4 +/-    0.83  0.030 / 0.060
G07     136.1          32.6                7.8 +/-    1.10      13.0 +/-    1.10  0.040 / 0.070
G11     56.0           32.4                2.6 +/-    0.60       4.3 +/-    0.60  0.050 / 0.090
G13     278.8          37.2                4.8 +/-    1.32       7.3 +/-    1.32  0.050 / 0.080
G15     304.0          15.3                0.7 +/-    1.90       1.7 +/-    1.90  0.030 / 0.040
G17     230.3          68.0                3.9 +/-    0.69       4.2 +/-    0.69  0.050 / 0.040
G19     222.7          41.2                5.2 +/-    0.85       7.4 +/-    0.85  0.090 / 0.340
G28     17.0           59.5                3.3 +/-    0.42       3.8 +/-    0.42  0.100 / 0.270
G30     132.6          62.0                6.3 +/-    0.99       7.0 +/-    0.99  0.050 / 0.080