PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-07:12:30
G02     44.2           45.5                3.4 +/-    1.59       4.6 +/-    1.59  0.030 / 0.020
G05     110.0          68.4                7.3 +/-    0.65       7.8 +/-    0.65  0.030 / 0.030
G06     59.3           10.2                3.0 +/-    1.90       8.3 +/-    1.90  0.030 / 0.040
G12     193.0          57.2                6.7 +/-    0.49       7.8 +/-    0.49  0.040 / 0.040
G20     202.7          31.6                4.1 +/-    1.06       7.0 +/-    1.06  0.120 / 0.260
G25     279.5          57.5                8.8 +/-    1.93      10.2 +/-    1.93  0.170 / 0.410
G29     315.2          37.1                3.5 +/-    1.33       5.3 +/-    1.33  0.130 / 0.130