PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-19:12:50
G07     116.8          47.7               12.8 +/-    0.50      16.6 +/-    0.50  0.040 / 0.060
G08     41.5           15.3                8.7 +/-    2.14      21.6 +/-    2.14  0.040 / 0.040
G09     174.5          10.3               15.0 +/-    3.98      41.7 +/-    3.98  0.070 / 0.050
G11     79.8           42.6               11.7 +/-    1.50      16.4 +/-    1.50  0.060 / 0.060
G13     304.7          32.5               10.2 +/-    2.47      16.9 +/-    2.47  0.030 / 0.020
G17     207.3          43.7               15.0 +/-    0.73      20.7 +/-    0.73  0.040 / 0.020
G18     72.3           24.0               10.8 +/-    1.58      21.7 +/-    1.58  0.140 / 0.200
G19     210.0          18.1               16.4 +/-    1.46      37.8 +/-    1.46  0.170 / 0.310
G28     319.1          60.4               10.3 +/-    0.79      11.7 +/-    0.79  0.100 / 0.160
G30     62.2           79.2               11.1 +/-    0.34      11.3 +/-    0.34  0.100 / 0.180