PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/13-11:27:50
G02     203.0          27.2                4.9 +/-    1.44       9.1 +/-    1.44  0.060 / 0.080
G06     163.7          64.5                7.1 +/-    0.78       7.8 +/-    0.78  0.060 / 0.100
G12     305.4          13.5                3.2 +/-    1.91       8.1 +/-    1.91  0.110 / 0.220
G17     33.6           51.0                3.2 +/-    0.51       4.0 +/-    0.51  0.090 / 0.230
G19     338.4          68.6                4.9 +/-    0.72       5.3 +/-    0.72  0.030 / 0.030
G24     300.1          38.0                4.6 +/-    0.95       7.0 +/-    0.95  0.030 / 0.030
G28     97.1           35.3                5.2 +/-    0.86       8.2 +/-    0.86  0.040 / 0.030