PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-03:12:40
G07     341.3          60.7                3.8 +/-    0.48       4.3 +/-    0.48  0.110 / 0.130
G08     90.1           52.4                6.4 +/-    1.30       7.9 +/-    1.30  0.080 / 0.130
G09     187.1          69.0                5.3 +/-    0.88       5.7 +/-    0.88  0.040 / 0.040
G11     142.9          15.7                7.2 +/-    1.96      17.7 +/-    1.96  0.040 / 0.030
G23     157.2          37.5                6.8 +/-    1.02      10.3 +/-    1.02  0.020 / 0.020
G27     50.1           28.2                2.4 +/-    2.24       4.3 +/-    2.24  0.020 / 0.030
G28     241.7          34.0                5.8 +/-    1.04       9.3 +/-    1.04  0.030 / 0.030
G30     306.8          39.5                4.2 +/-    1.25       6.1 +/-    1.25  0.030 / 0.030