PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/09-08:13:10
G02     199.8          22.8                3.9 +/-    1.71       8.0 +/-    1.71  0.060 / 0.090
G06     176.4          50.7                6.3 +/-    0.80       7.9 +/-    0.80  0.060 / 0.080
G13     227.9          12.7                2.0 +/-    2.32       5.3 +/-    2.32  0.030 / 0.030
G17     24.3           58.4                4.1 +/-    0.66       4.7 +/-    0.66  0.040 / 0.020
G19     330.3          71.0                3.1 +/-    0.53       3.2 +/-    0.53  0.090 / 0.110
G24     310.5          29.0                2.3 +/-    0.94       4.0 +/-    0.94  0.070 / 0.090
G28     89.5           38.7                5.8 +/-    0.85       8.6 +/-    0.85  0.040 / 0.040
G30     156.8          12.8                3.3 +/-    1.28       8.7 +/-    1.28  0.040 / 0.040