PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-00:57:50
G02     203.8          38.6                9.1 +/-    1.21      13.6 +/-    1.21  0.060 / 0.100
G06     166.4          69.0                7.9 +/-    0.45       8.3 +/-    0.45  0.070 / 0.090
G12     308.0          15.3                3.5 +/-    2.17       8.6 +/-    2.17  0.060 / 0.120
G17     40.0           45.6                5.9 +/-    0.91       7.8 +/-    0.91  0.060 / 0.110
G19     6.6            63.6                6.5 +/-    0.52       7.2 +/-    0.52  0.040 / 0.030
G24     292.4          40.6                3.2 +/-    8.47       4.6 +/-    8.47  0.040 / 0.030
G28     103.4          32.5                7.9 +/-    1.78      13.2 +/-    1.78  0.070 / 0.230