PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-19:27:50
G01     103.8          26.6               15.7 +/-    0.84      29.7 +/-    0.84  0.070 / 0.170
G07     113.9          49.9               15.0 +/-    0.72      19.0 +/-    0.72  0.090 / 0.170
G08     41.5           17.3               10.3 +/-    0.95      24.3 +/-    0.95  0.030 / 0.050
G09     175.0          12.4               17.0 +/-    1.04      44.9 +/-    1.04  0.030 / 0.060
G11     83.2           42.8               14.7 +/-    0.79      20.5 +/-    0.79  0.060 / 0.040
G13     306.9          31.1               12.8 +/-    2.59      21.9 +/-    2.59  0.050 / 0.030
G17     206.1          41.3               15.2 +/-    0.39      21.6 +/-    0.39  0.140 / 0.320
G18     74.9           23.9               12.6 +/-    0.83      25.2 +/-    0.83  0.140 / 0.340
G28     314.4          59.9               12.5 +/-    0.94      14.2 +/-    0.94  0.080 / 0.140
G30     46.5           79.2               12.7 +/-    0.87      12.9 +/-    0.87  0.090 / 0.140