PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-13:57:40
G03     221.9          67.3               12.1 +/-    0.76      13.0 +/-    0.76  0.160 / 0.250
G07     249.3          12.8                8.6 +/-    1.81      22.7 +/-    1.81  0.190 / 0.260
G09     303.2          17.4                9.3 +/-    3.05      21.7 +/-    3.05  0.060 / 0.060
G14     100.1          13.4               10.1 +/-    3.23      26.2 +/-    3.23  0.040 / 0.060
G16     132.6          58.0               12.1 +/-    0.40      14.0 +/-    0.40  0.040 / 0.040
G22     189.4          51.5               11.6 +/-    1.11      14.4 +/-    1.11  0.040 / 0.040
G23     319.8          49.7                9.7 +/-    0.59      12.3 +/-    0.59  0.040 / 0.040
G26     71.7           53.2                8.8 +/-    0.54      10.7 +/-    0.54  0.030 / 0.040
G31     52.4           19.7                9.0 +/-    2.93      20.0 +/-    2.93  0.140 / 0.340