PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-21:12:50
G01     61.8           31.2               13.1 +/-    0.94      22.4 +/-    0.94  0.040 / 0.040
G07     141.6          24.2               16.4 +/-    1.49      32.6 +/-    1.49  0.040 / 0.050
G11     49.7           26.2               10.9 +/-    1.84      20.7 +/-    1.84  0.140 / 0.290
G13     264.8          35.7               16.7 +/-    1.89      26.2 +/-    1.89  0.100 / 0.270
G15     295.4          16.3               12.8 +/-    1.03      30.9 +/-    1.03  0.040 / 0.050
G17     247.3          71.2               16.9 +/-    0.59      17.7 +/-    0.59  0.040 / 0.060
G18     43.7           14.2                9.7 +/-    2.11      24.5 +/-    2.11  0.110 / 0.350
G19     231.0          48.2               17.5 +/-    2.00      22.5 +/-    2.00  0.090 / 0.220
G28     33.8           57.0               15.7 +/-    0.91      18.3 +/-    0.91  0.080 / 0.140
G30     142.3          52.4               17.1 +/-    0.86      21.0 +/-    0.86  0.120 / 0.170