PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-19:58:00
G01     104.4          27.0               12.5 +/-    1.70      23.4 +/-    1.70  0.070 / 0.130
G07     110.6          56.7               13.5 +/-    0.38      15.8 +/-    0.38  0.060 / 0.140
G08     42.1           21.2                9.3 +/-    2.67      20.0 +/-    2.67  0.180 / 0.230
G09     174.7          11.7               15.7 +/-    4.40      42.1 +/-    4.40  0.250 / 0.140
G11     87.1           43.3               15.1 +/-    1.04      20.9 +/-    1.04  0.070 / 0.110
G13     307.7          30.0               12.2 +/-    0.96      21.3 +/-    0.96  0.060 / 0.110
G17     208.2          36.4               14.8 +/-    1.56      23.0 +/-    1.56  0.030 / 0.040
G18     78.0           24.7               11.5 +/-    0.97      22.6 +/-    0.97  0.030 / 0.040
G28     324.1          61.4               11.3 +/-    0.92      12.7 +/-    0.92  0.020 / 0.030
G30     45.9           79.0               12.5 +/-    0.87      12.7 +/-    0.87  0.030 / 0.020