PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-03:13:10
G01     39.3           13.2                1.4 +/-    1.19       3.7 +/-    1.19  0.040 / 0.090
G02     198.7          13.8                2.6 +/-    2.50       6.8 +/-    2.50  0.050 / 0.070
G06     176.0          42.0                6.1 +/-    0.94       8.6 +/-    0.94  0.090 / 0.080
G13     234.9          19.2                4.3 +/-    1.48       9.7 +/-    1.48  0.070 / 0.070
G15     266.3          10.9                3.4 +/-    2.79       9.3 +/-    2.79  0.040 / 0.040
G17     6.2            68.0                3.6 +/-    0.36       3.9 +/-    0.36  0.040 / 0.050
G19     292.6          70.9                3.1 +/-    0.67       3.3 +/-    0.67  0.070 / 0.130
G24     315.3          22.0               -0.4 +/-    1.94      -0.8 +/-    1.94  0.060 / 0.100
G28     77.8           44.2                3.7 +/-    0.70       5.0 +/-    0.70  0.080 / 0.190
G30     154.3          19.3                6.1 +/-    2.96      13.6 +/-    2.96  0.080 / 0.140