PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-23:57:40
G02     226.1          69.7               10.3 +/-    0.50      10.9 +/-    0.50  0.060 / 0.100
G05     174.0          10.2               -9.4 +/-   15.26     -26.1 +/-   15.26  0.060 / 0.090
G06     44.9           69.6                8.2 +/-    0.61       8.6 +/-    0.61  0.040 / 0.060
G12     319.8          41.4                8.1 +/-    0.44      11.5 +/-    0.44  0.040 / 0.060
G17     64.6           26.2                8.1 +/-    1.60      15.3 +/-    1.60  0.100 / 0.000
G19     48.8           43.3                9.5 +/-    1.21      13.1 +/-    1.21  0.150 / 0.220
G24     252.5          38.6               10.7 +/-    1.95      16.0 +/-    1.95  0.040 / 0.060
G28     127.0          10.9               14.2 +/-    2.52      38.9 +/-    2.52  0.050 / 0.060