PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-13:27:40
G03     231.1          67.2                7.2 +/-    0.54       7.8 +/-    0.54  0.120 / 0.230
G09     304.1          18.9                5.5 +/-    1.67      12.3 +/-    1.67  0.110 / 0.260
G14     99.3           17.6                6.2 +/-    2.88      14.6 +/-    2.88  0.040 / 0.050
G16     120.7          60.2                8.5 +/-    0.70       9.7 +/-    0.70  0.040 / 0.050
G22     188.8          51.0                8.6 +/-    0.69      10.7 +/-    0.69  0.050 / 0.040
G23     324.4          54.1                6.4 +/-    0.63       7.8 +/-    0.63  0.040 / 0.040
G26     65.1           49.5                6.3 +/-    0.55       8.0 +/-    0.55  0.040 / 0.050
G31     53.5           16.7                6.4 +/-    2.64      15.3 +/-    2.64  0.040 / 0.030