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                3.0 +/-    1.52       5.0 +/-    1.52  0.030 / 0.040
G07     136.1          32.6                7.6 +/-    1.08      12.6 +/-    1.08  0.040 / 0.050
G11     56.0           32.4                2.6 +/-    0.87       4.3 +/-    0.87  0.090 / 0.190
G13     278.8          37.2                4.0 +/-    1.41       6.0 +/-    1.41  0.090 / 0.180
G15     304.0          15.3                0.5 +/-    1.12       1.2 +/-    1.12  0.030 / 0.030
G17     230.3          68.0                6.1 +/-    0.59       6.5 +/-    0.59  0.030 / 0.020
G19     222.7          41.2                5.6 +/-    2.12       8.0 +/-    2.12  0.050 / 0.070
G28     17.0           59.5                4.0 +/-    1.29       4.6 +/-    1.29  0.050 / 0.060
G30     132.6          62.0                6.4 +/-    0.22       7.2 +/-    0.22  0.070 / 0.090