PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-20:13:00
G01     84.4           32.4               10.6 +/-    1.50      17.7 +/-    1.50  0.040 / 0.080
G07     129.7          35.5               13.0 +/-    1.02      20.4 +/-    1.02  0.040 / 0.070
G11     62.3           37.3               11.8 +/-    0.94      18.0 +/-    0.94  0.140 / 0.160
G13     288.7          37.9               14.9 +/-    0.83      22.4 +/-    0.83  0.100 / 0.140
G15     311.5          12.3               10.2 +/-    1.74      27.1 +/-    1.74  0.040 / 0.050
G17     217.1          58.8               12.4 +/-    1.06      14.3 +/-    1.06  0.040 / 0.050
G18     57.2           21.6               10.5 +/-    3.43      22.2 +/-    3.43  0.060 / 0.100
G19     216.1          31.4               12.1 +/-    2.76      20.6 +/-    2.76  0.060 / 0.120
G28     348.2          61.6               10.8 +/-    0.66      12.1 +/-    0.66  0.030 / 0.030
G30     118.4          71.1               12.8 +/-    0.95      13.5 +/-    0.95  0.030 / 0.030