PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-20:27:50
G01     103.7          27.3               13.6 +/-    1.31      25.3 +/-    1.31  0.070 / 0.120
G07     111.5          56.2               14.5 +/-    0.56      17.0 +/-    0.56  0.100 / 0.130
G08     42.1           21.0               10.8 +/-    2.93      23.2 +/-    2.93  0.180 / 0.170
G09     174.6          11.3               18.2 +/-    4.76      49.5 +/-    4.76  0.110 / 0.170
G11     86.5           43.3               16.5 +/-    1.96      22.8 +/-    1.96  0.030 / 0.030
G13     307.2          30.3               13.1 +/-    0.84      22.8 +/-    0.84  0.030 / 0.030
G17     208.6          36.4               15.8 +/-    1.74      24.5 +/-    1.74  0.070 / 0.130
G18     77.3           24.8               13.0 +/-    1.13      25.5 +/-    1.13  0.060 / 0.130
G28     325.4          61.5               12.9 +/-    0.70      14.5 +/-    0.70  0.040 / 0.050
G30     50.9           79.0               14.2 +/-    0.94      14.4 +/-    0.94  0.030 / 0.050