PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-05:27:40
G01     93.2           31.1                4.5 +/-    1.19       7.6 +/-    1.19  0.040 / 0.040
G07     123.0          47.2                6.1 +/-    0.62       7.9 +/-    0.62  0.030 / 0.040
G11     72.6           40.6                4.7 +/-    1.35       6.7 +/-    1.35  0.040 / 0.030
G13     298.7          34.2                4.1 +/-    2.45       6.6 +/-    2.45  0.050 / 0.040
G17     212.6          52.0                6.7 +/-    0.73       8.3 +/-    0.73  0.030 / 0.040
G19     213.4          25.8                5.5 +/-    1.48      10.5 +/-    1.48  0.040 / 0.040
G28     345.5          61.8                3.4 +/-    0.50       3.8 +/-    0.50  0.080 / 0.090
G30     97.2           76.1                5.6 +/-    0.57       5.7 +/-    0.57  0.080 / 0.090