PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-23:42:50
G02     219.6          64.8               12.1 +/-    1.06      13.2 +/-    1.06  0.060 / 0.080
G06     52.6           74.4               10.0 +/-    0.53      10.3 +/-    0.53  0.060 / 0.070
G12     318.6          36.7               10.7 +/-    1.70      16.5 +/-    1.70  0.150 / 0.330
G17     60.5           29.3               11.3 +/-    1.59      20.2 +/-    1.59  0.170 / 0.320
G19     43.4           46.5               10.1 +/-    1.00      13.3 +/-    1.00  0.040 / 0.070
G24     258.8          40.6               11.7 +/-    4.94      16.9 +/-    4.94  0.060 / 0.080
G28     123.8          14.7               14.3 +/-    1.54      35.8 +/-    1.54  0.050 / 0.060