PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-07:43:00
G10     284.4          46.7                4.3 +/-    2.88       5.6 +/-    2.88  0.040 / 0.040
G15     48.4           35.8                3.6 +/-    0.84       5.7 +/-    0.84  0.030 / 0.060
G20     42.9           52.6                4.6 +/-    0.69       5.6 +/-    0.69  0.090 / 0.090
G21     58.5           77.2                4.6 +/-    0.33       4.7 +/-    0.33  0.100 / 0.080
G24     107.1          22.4                5.4 +/-    1.88      11.3 +/-    1.88  0.030 / 0.040
G27     308.8          29.8                3.8 +/-    0.95       6.7 +/-    0.95  0.040 / 0.030
G29     168.7          16.3                4.5 +/-    1.23      10.8 +/-    1.23  0.090 / 0.150
G32     207.1          24.5                6.1 +/-    1.99      12.1 +/-    1.99  0.090 / 0.140