PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-04:27:50
G01     115.6          20.4                5.7 +/-    0.95      12.4 +/-    0.95  0.040 / 0.060
G07     90.4           63.9                5.4 +/-    0.35       5.9 +/-    0.35  0.050 / 0.070
G08     43.6           27.9                2.6 +/-    1.60       4.8 +/-    1.60  0.030 / 0.030
G09     176.8          22.6                4.9 +/-    2.61      10.0 +/-    2.61  0.030 / 0.040
G11     102.4          40.8                5.9 +/-    0.52       8.4 +/-    0.52  0.050 / 0.110
G13     316.4          21.2                1.9 +/-    1.40       4.2 +/-    1.40  0.060 / 0.100
G17     202.6          29.5                6.5 +/-    2.88      11.5 +/-    2.88  0.090 / 0.170
G28     301.5          59.1                5.0 +/-    0.80       5.8 +/-    0.80  0.070 / 0.130
G30     0.1            72.7                4.3 +/-    0.82       4.5 +/-    0.82  0.070 / 0.080