PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/18-21:27:50
G01     109.0          24.0               11.1 +/-    1.42      22.1 +/-    1.42  0.030 / 0.030
G07     106.7          55.1               11.7 +/-    0.76      13.9 +/-    0.76  0.030 / 0.040
G08     41.8           20.8                8.7 +/-    3.54      18.7 +/-    3.54  0.060 / 0.150
G09     175.7          16.6               10.6 +/-    2.17      25.4 +/-    2.17  0.080 / 0.180
G11     90.0           42.7               11.2 +/-    0.61      15.6 +/-    0.61  0.050 / 0.050
G13     311.0          27.9                9.0 +/-    2.34      16.6 +/-    2.34  0.050 / 0.060
G17     203.8          37.0               11.2 +/-    1.36      17.2 +/-    1.36  0.030 / 0.030
G18     79.7           23.2                8.5 +/-    1.25      17.3 +/-    1.25  0.030 / 0.030
G28     305.9          58.9               10.1 +/-    0.84      11.6 +/-    0.84  0.190 / 0.390
G30     16.0           77.1               11.3 +/-    0.77      11.6 +/-    0.77  0.180 / 0.310