PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-15:27:50
G01     110.0          24.0               10.1 +/-    1.77      20.2 +/-    1.77  0.040 / 0.040
G07     101.9          60.6               11.1 +/-    1.15      12.5 +/-    1.15  0.030 / 0.050
G08     42.3           23.1                7.8 +/-    0.93      16.0 +/-    0.93  0.020 / 0.040
G09     174.8          15.4               13.5 +/-    1.25      33.2 +/-    1.25  0.040 / 0.040
G11     93.0           42.6               10.9 +/-    0.38      15.2 +/-    0.38  0.100 / 0.190
G13     311.8          26.8               10.2 +/-    1.54      19.1 +/-    1.54  0.080 / 0.190
G17     205.0          33.9               11.8 +/-    1.41      19.1 +/-    1.41  0.050 / 0.060
G18     83.5           23.8                8.8 +/-    0.61      17.7 +/-    0.61  0.050 / 0.060
G28     311.9          60.4                9.7 +/-    1.10      11.0 +/-    1.10  0.070 / 0.110
G30     10.3           76.2               12.1 +/-    0.49      12.4 +/-    0.49  0.070 / 0.100