PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-08:27:50
G02     68.9           24.0                4.0 +/-    0.67       8.1 +/-    0.67  0.030 / 0.050
G05     48.2           50.4                3.5 +/-    0.73       4.3 +/-    0.73  0.020 / 0.050
G12     183.9          23.2                3.5 +/-    1.36       7.1 +/-    1.36  0.040 / 0.050
G13     120.6          22.0                7.4 +/-    1.23      15.5 +/-    1.23  0.040 / 0.050
G15     156.8          21.1                4.8 +/-    1.62      10.3 +/-    1.62  0.080 / 0.180
G20     218.5          65.0                6.1 +/-    1.59       6.6 +/-    1.59  0.080 / 0.190
G21     280.4          25.2                5.1 +/-    1.98       9.9 +/-    1.98  0.080 / 0.190
G25     225.3          44.0                7.0 +/-    1.52       9.6 +/-    1.52  0.100 / 0.210
G29     336.8          66.0                3.4 +/-    1.03       3.6 +/-    1.03  0.060 / 0.100