PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-13:57:50
G03     215.3          64.2               10.4 +/-    0.74      11.4 +/-    0.74  0.060 / 0.230
G07     252.1          15.2                5.1 +/-    2.20      12.5 +/-    2.20  0.070 / 0.240
G09     305.2          20.1                5.7 +/-    1.06      12.4 +/-    1.06  0.050 / 0.050
G14     102.9          11.1                8.3 +/-    1.23      22.6 +/-    1.23  0.040 / 0.050
G16     125.7          60.8               10.6 +/-    0.41      12.0 +/-    0.41  0.040 / 0.030
G22     188.0          47.7               10.4 +/-    0.51      13.5 +/-    0.51  0.030 / 0.040
G23     322.8          52.7                8.0 +/-    0.51       9.8 +/-    0.51  0.040 / 0.040
G26     65.9           51.3                6.3 +/-    0.79       7.8 +/-    0.79  0.030 / 0.040
G31     54.4           16.9                6.2 +/-    1.56      14.7 +/-    1.56  0.180 / 0.350