PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/08-08:42:10
G02     202.1          34.1                6.1 +/-    1.01       9.8 +/-    1.01  0.050 / 0.110
G06     172.0          63.4                8.3 +/-    0.46       9.2 +/-    0.46  0.050 / 0.100
G12     306.3          12.5                3.8 +/-    2.03      10.0 +/-    2.03  0.040 / 0.030
G17     35.5           49.7                3.4 +/-    0.61       4.3 +/-    0.61  0.050 / 0.030
G19     0.8            65.7                3.7 +/-    0.46       4.0 +/-    0.46  0.240 / 0.260
G24     301.3          36.2                3.4 +/-    1.66       5.3 +/-    1.66  0.190 / 0.170
G28     101.3          31.7                5.0 +/-    1.00       8.4 +/-    1.00  0.030 / 0.030