PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-19:27:50
G01     109.4          23.7               13.4 +/-    3.37      27.0 +/-    3.37  0.030 / 0.040
G07     106.6          54.4               13.5 +/-    0.48      16.1 +/-    0.48  0.030 / 0.040
G08     42.0           22.0               10.9 +/-    2.92      22.8 +/-    2.92  0.040 / 0.060
G09     176.0          17.5               13.6 +/-    2.29      31.9 +/-    2.29  0.040 / 0.050
G11     91.1           42.8               14.2 +/-    0.73      19.7 +/-    0.73  0.070 / 0.170
G13     311.4          27.6               10.0 +/-    2.07      18.5 +/-    2.07  0.060 / 0.180
G17     203.8          35.6               14.0 +/-    0.95      21.9 +/-    0.95  0.160 / 0.270
G18     81.0           23.3               11.7 +/-    1.13      23.8 +/-    1.13  0.170 / 0.280
G28     303.9          58.4               12.3 +/-    1.43      14.2 +/-    1.43  0.030 / 0.030
G30     18.2           77.1               12.4 +/-    0.83      12.7 +/-    0.83  0.040 / 0.030