PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-19:58:00
G01     88.2           31.8               13.6 +/-    1.29      22.9 +/-    1.29  0.040 / 0.060
G07     127.3          38.2               14.3 +/-    0.83      21.4 +/-    0.83  0.040 / 0.060
G11     65.7           38.9               13.0 +/-    1.31      19.2 +/-    1.31  0.060 / 0.120
G13     292.5          37.2               11.0 +/-    2.70      16.7 +/-    2.70  0.060 / 0.110
G15     313.9          11.0                2.8 +/-   25.83       7.6 +/-   25.83  0.110 / 0.110
G17     214.4          55.5               14.2 +/-    0.75      16.8 +/-    0.75  0.070 / 0.110
G18     60.3           22.5               11.5 +/-    1.42      23.8 +/-    1.42  0.120 / 0.170
G19     214.5          28.4               16.2 +/-    1.28      29.3 +/-    1.28  0.140 / 0.150
G28     341.8          61.6               11.4 +/-    0.70      12.7 +/-    0.70  0.030 / 0.030
G30     110.8          73.7               13.1 +/-    0.60      13.6 +/-    0.60  0.030 / 0.030