PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-06:28:10
G01     220.2          11.0                4.6 +/-    1.77      12.6 +/-    1.77  0.040 / 0.040
G03     265.7          69.2                4.5 +/-    1.05       4.8 +/-    1.05  0.030 / 0.050
G09     300.3          15.8                1.5 +/-    2.10       3.6 +/-    2.10  0.210 / 0.410
G14     93.7           19.7                3.2 +/-    1.36       7.0 +/-    1.36  0.170 / 0.460
G16     132.4          54.2                5.3 +/-    0.56       6.4 +/-    0.56  0.130 / 0.240
G22     203.8          63.1                4.5 +/-    0.92       5.0 +/-    0.92  0.110 / 0.200
G23     313.6          43.2                3.5 +/-    1.02       4.9 +/-    1.02  0.060 / 0.060
G26     77.5           52.6                4.5 +/-    1.13       5.5 +/-    1.13  0.060 / 0.060
G31     49.6           22.9                1.5 +/-    2.12       3.0 +/-    2.12  0.040 / 0.050