PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-11:57:40
G05     47.5           20.2                3.0 +/-    0.94       6.5 +/-    0.94  0.080 / 0.160
G13     83.3           36.9                6.5 +/-    0.56      10.0 +/-    0.56  0.080 / 0.100
G15     128.4          49.2                8.1 +/-    1.25      10.3 +/-    1.25  0.040 / 0.040
G18     241.9          40.8                5.0 +/-    1.92       7.2 +/-    1.92  0.040 / 0.040
G20     11.7           75.0                4.8 +/-    0.62       4.9 +/-    0.62  0.040 / 0.080
G21     311.2          46.7                3.1 +/-    0.83       4.1 +/-    0.83  0.050 / 0.070
G25     202.3          14.8                5.0 +/-    2.80      12.4 +/-    2.80  0.120 / 0.240
G26     293.4          20.2                4.5 +/-    1.73       9.9 +/-    1.73  0.120 / 0.230
G29     148.8          75.0                5.8 +/-    1.16       6.0 +/-    1.16  0.220 / 0.300