PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/15-11:57:50
G02     200.3          21.0                5.7 +/-    1.01      12.2 +/-    1.01  0.050 / 0.070
G06     173.3          52.6                6.4 +/-    0.84       7.8 +/-    0.84  0.050 / 0.080
G13     228.6          13.1                6.5 +/-    2.43      17.0 +/-    2.43  0.030 / 0.040
G17     25.3           57.8                2.4 +/-    0.45       2.7 +/-    0.45  0.020 / 0.040
G19     330.5          71.1                2.4 +/-    0.63       2.5 +/-    0.63  0.080 / 0.140
G24     311.0          28.5                2.5 +/-    0.98       4.5 +/-    0.98  0.080 / 0.130
G28     89.0           39.0                3.0 +/-    0.56       4.4 +/-    0.56  0.030 / 0.050
G30     157.3          14.8                4.0 +/-    1.06      10.0 +/-    1.06  0.040 / 0.040