PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-18:42:40
G07     101.3          56.8               14.2 +/-    0.98      16.6 +/-    0.98  0.030 / 0.030
G08     42.8           25.4               10.6 +/-    2.10      20.5 +/-    2.10  0.030 / 0.030
G09     176.7          21.0               13.2 +/-    1.04      28.4 +/-    1.04  0.090 / 0.160
G11     96.4           42.4               14.1 +/-    0.71      19.8 +/-    0.71  0.070 / 0.170
G13     313.8          25.1               11.2 +/-    2.00      21.9 +/-    2.00  0.100 / 0.240
G17     202.6          31.5               15.6 +/-    2.03      26.6 +/-    2.03  0.100 / 0.190
G18     85.2           22.6               11.5 +/-    2.18      23.9 +/-    2.18  0.130 / 0.230
G28     296.9          57.1               14.6 +/-    0.65      17.1 +/-    0.65  0.140 / 0.270
G30     6.5            74.9               14.0 +/-    0.39      14.5 +/-    0.39  0.040 / 0.060