PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-14:57:40
G02     202.3          23.8               10.0 +/-    3.03      20.1 +/-    3.03  0.180 / 0.400
G06     163.5          62.2               10.7 +/-    0.67      11.9 +/-    0.67  0.220 / 0.350
G12     304.4          13.6                6.0 +/-    2.04      15.3 +/-    2.04  0.140 / 0.160
G17     30.1           53.9                8.5 +/-    0.69      10.3 +/-    0.69  0.110 / 0.110
G19     329.4          69.5                8.7 +/-    0.88       9.2 +/-    0.88  0.130 / 0.200
G24     304.4          35.0                8.7 +/-    0.93      13.7 +/-    0.93  0.120 / 0.200
G28     94.1           36.4                7.7 +/-    0.59      11.9 +/-    0.59  0.060 / 0.040
G30     158.3          10.7               11.1 +/-    4.50      30.4 +/-    4.50  0.050 / 0.040