PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-04:57:40
G02     214.7          61.7                5.7 +/-    0.70       6.4 +/-    0.70  0.160 / 0.510
G06     64.4           77.6                2.7 +/-    0.54       2.8 +/-    0.54  0.210 / 0.390
G12     318.0          34.0                2.4 +/-    1.63       3.9 +/-    1.63  0.030 / 0.030
G17     56.1           34.0                0.9 +/-    0.56       1.5 +/-    0.56  0.040 / 0.030
G19     39.2           49.3                2.1 +/-    1.47       2.7 +/-    1.47  0.030 / 0.080
G24     267.5          41.6                5.7 +/-    1.31       8.0 +/-    1.31  0.040 / 0.070
G28     122.5          13.5                4.9 +/-    1.57      12.8 +/-    1.57  0.050 / 0.080