PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/20-06:43:10
G07     338.8          59.8                5.7 +/-    0.93       6.4 +/-    0.93  0.090 / 0.170
G08     92.8           51.7                5.9 +/-    1.04       7.3 +/-    1.04  0.090 / 0.190
G09     186.1          70.7                5.3 +/-    0.97       5.6 +/-    0.97  0.040 / 0.080
G11     143.3          14.2                5.5 +/-    2.11      13.8 +/-    2.11  0.050 / 0.080
G16     47.1           9.9                 2.4 +/-    5.56       6.7 +/-    5.56  0.030 / 0.060
G23     156.7          41.2                8.2 +/-    1.10      11.7 +/-    1.10  0.040 / 0.060
G27     52.3           29.6                4.0 +/-    0.95       7.0 +/-    0.95  0.110 / 0.490
G28     239.4          31.9                6.2 +/-    1.80      10.5 +/-    1.80  0.140 / 0.640
G30     303.4          36.1                4.6 +/-    0.65       7.2 +/-    0.65  0.030 / 0.030