PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-21:12:30
G02     206.8          45.0               20.1 +/-    0.56      27.0 +/-    0.56  0.120 / 0.130
G06     126.2          78.0               18.2 +/-    0.25      18.5 +/-    0.25  0.120 / 0.150
G12     313.0          24.2               15.1 +/-    1.54      30.1 +/-    1.54  0.060 / 0.060
G17     43.0           44.2               16.0 +/-    1.41      21.8 +/-    1.41  0.060 / 0.080
G19     16.2           60.2               16.4 +/-    0.80      18.6 +/-    0.80  0.030 / 0.020
G24     285.4          41.9               21.3 +/-    2.07      30.1 +/-    2.07  0.040 / 0.020
G28     111.5          24.3               16.4 +/-    1.44      32.5 +/-    1.44  0.040 / 0.040