PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-12:28:00
G01     121.0          16.3                6.7 +/-    1.37      16.1 +/-    1.37  0.040 / 0.090
G07     78.9           65.2                5.0 +/-    0.53       5.4 +/-    0.53  0.030 / 0.070
G08     45.5           31.8                4.4 +/-    0.57       7.5 +/-    0.57  0.030 / 0.040
G09     175.3          26.3                6.6 +/-    0.96      12.5 +/-    0.96  0.030 / 0.040
G11     107.1          37.5                6.3 +/-    1.58       9.6 +/-    1.58  0.140 / 0.430
G13     319.7          15.5                1.6 +/-    3.24       3.9 +/-    3.24  0.110 / 0.410
G17     200.4          24.4                5.6 +/-    1.48      11.1 +/-    1.48  0.130 / 0.200
G28     288.7          56.3                4.3 +/-    0.73       5.1 +/-    0.73  0.120 / 0.210
G30     339.4          64.7                4.2 +/-    0.76       4.6 +/-    0.76  0.070 / 0.210