PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/02-21:57:40
G02     204.0          38.3               15.3 +/-    2.59      23.0 +/-    2.59  0.060 / 0.090
G06     160.5          70.7               12.7 +/-    1.01      13.4 +/-    1.01  0.050 / 0.090
G12     308.0          15.3                8.3 +/-    2.87      20.6 +/-    2.87  0.060 / 0.120
G17     38.9           46.6               10.8 +/-    0.24      14.2 +/-    0.24  0.050 / 0.140
G19     8.2            63.2               10.8 +/-    0.60      11.9 +/-    0.60  0.070 / 0.090
G24     293.3          40.0               10.6 +/-    1.05      15.5 +/-    1.05  0.060 / 0.090
G28     103.1          33.1               12.6 +/-    0.54      20.7 +/-    0.54  0.050 / 0.050