PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-05:57:40
G02     87.6           9.5                 3.2 +/-    8.69       9.1 +/-    8.69  0.090 / 0.110
G05     45.5           27.1                2.0 +/-    1.99       3.8 +/-    1.99  0.120 / 0.130
G13     94.4           34.8                6.9 +/-    0.71      11.0 +/-    0.71  0.040 / 0.040
G15     140.0          41.9                6.9 +/-    0.77       9.7 +/-    0.77  0.030 / 0.040
G20     249.3          65.9                6.6 +/-    0.42       7.2 +/-    0.42  0.130 / 0.110
G21     300.6          38.5                3.5 +/-    1.43       5.3 +/-    1.43  0.070 / 0.090
G25     207.6          22.7                6.3 +/-    2.36      13.1 +/-    2.36  0.120 / 0.260
G26     300.6          20.0                2.8 +/-    0.95       6.1 +/-    0.95  0.190 / 0.260
G29     97.3           87.1                5.3 +/-    0.21       5.3 +/-    0.21  0.020 / 0.020