PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/09-03:57:50
G07     12.3           67.4                3.6 +/-    0.99       3.9 +/-    0.99  0.100 / 0.180
G08     65.5           48.8                4.1 +/-    1.11       5.2 +/-    1.11  0.090 / 0.140
G09     180.6          52.3                6.7 +/-    0.74       8.2 +/-    0.74  0.040 / 0.040
G11     132.0          25.5                6.8 +/-    1.15      13.1 +/-    1.15  0.040 / 0.050
G23     160.2          22.3                5.7 +/-    1.21      11.8 +/-    1.21  0.210 / 0.200
G27     41.0           17.8                2.6 +/-    2.34       6.1 +/-    2.34  0.240 / 0.120
G28     257.2          44.8                5.3 +/-    3.58       7.2 +/-    3.58  0.040 / 0.030
G30     319.8          50.2                3.5 +/-    0.47       4.4 +/-    0.47  0.030 / 0.030