PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/17-01:57:30
G02     202.0          34.5               10.8 +/-    1.09      17.3 +/-    1.09  0.110 / 0.200
G06     164.5          66.5                9.6 +/-    0.40      10.4 +/-    0.40  0.200 / 0.310
G12     306.4          13.0                9.1 +/-    0.94      23.6 +/-    0.94  0.070 / 0.110
G17     31.3           53.0                8.2 +/-    0.94      10.0 +/-    0.94  0.060 / 0.110
G19     357.0          66.3                7.7 +/-    0.43       8.3 +/-    0.43  0.040 / 0.040
G24     300.4          36.8                8.9 +/-    2.27      13.7 +/-    2.27  0.050 / 0.030
G28     101.1          31.9                7.6 +/-    0.84      12.8 +/-    0.84  0.050 / 0.080