PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-09:58:10
G02     262.0          80.7                6.9 +/-    0.47       7.0 +/-    0.47  0.050 / 0.220
G05     170.5          19.7                5.9 +/-    1.72      13.1 +/-    1.72  0.060 / 0.190
G06     38.7           60.0                5.8 +/-    0.39       6.6 +/-    0.39  0.040 / 0.050
G12     320.9          54.7                6.2 +/-    1.53       7.4 +/-    1.53  0.040 / 0.050
G17     75.3           18.9                5.2 +/-    0.94      11.8 +/-    0.94  0.120 / 0.350
G19     62.6           34.9                4.6 +/-    0.56       7.4 +/-    0.56  0.120 / 0.310
G24     242.3          32.5                9.7 +/-    1.25      16.2 +/-    1.25  0.030 / 0.030
G25     317.4          16.3                4.7 +/-    1.98      11.3 +/-    1.98  0.030 / 0.040