PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-02:58:10
G07     353.3          64.0                3.2 +/-    0.66       3.5 +/-    0.66  0.040 / 0.090
G08     78.7           52.0                3.5 +/-    0.88       4.4 +/-    0.88  0.050 / 0.100
G09     183.3          61.7                5.7 +/-    0.53       6.4 +/-    0.53  0.040 / 0.030
G11     138.5          20.0                8.5 +/-    1.50      18.7 +/-    1.50  0.040 / 0.030
G23     158.8          30.4                5.8 +/-    1.15      10.0 +/-    1.15  0.040 / 0.020
G27     45.4           23.8                1.7 +/-    2.13       3.4 +/-    2.13  0.030 / 0.020
G28     248.1          39.0                3.6 +/-    0.93       5.3 +/-    0.93  0.090 / 0.100
G30     312.7          44.5                2.8 +/-    0.82       3.8 +/-    0.82  0.060 / 0.210