PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-02:42:50
G01     37.7           9.7                 2.0 +/-    4.36       5.6 +/-    4.36  0.040 / 0.060
G02     199.0          18.1                5.1 +/-    2.21      11.9 +/-    2.21  0.040 / 0.050
G06     174.5          47.3                7.4 +/-    0.59       9.7 +/-    0.59  0.070 / 0.480
G13     231.4          16.2                6.3 +/-    3.46      15.1 +/-    3.46  0.100 / 0.250
G17     12.6           64.9                4.6 +/-    0.39       5.0 +/-    0.39  0.040 / 0.050
G19     307.7          71.5                3.9 +/-    0.48       4.1 +/-    0.48  0.040 / 0.050
G24     313.2          25.6                3.4 +/-    1.17       6.5 +/-    1.17  0.030 / 0.030
G28     83.2           41.8                5.0 +/-    0.78       7.0 +/-    0.78  0.030 / 0.030
G30     155.3          15.6                7.7 +/-    3.38      18.8 +/-    3.38  0.260 / 0.430