PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-02:57:30
G07     339.2          60.0                4.2 +/-    0.86       4.7 +/-    0.86  0.100 / 0.150
G08     92.4           52.3                6.8 +/-    0.46       8.4 +/-    0.46  0.080 / 0.120
G09     188.4          70.4                6.4 +/-    0.98       6.7 +/-    0.98  0.030 / 0.030
G11     143.8          14.8                6.9 +/-    3.85      17.2 +/-    3.85  0.030 / 0.030
G23     156.9          38.8                9.2 +/-    1.36      13.6 +/-    1.36  0.050 / 0.070
G27     51.2           28.9                3.1 +/-    0.87       5.5 +/-    0.87  0.060 / 0.080
G28     240.6          33.0                6.3 +/-    1.82      10.4 +/-    1.82  0.040 / 0.050
G30     305.8          38.8                3.8 +/-    1.00       5.7 +/-    1.00  0.050 / 0.050