PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-14:12:50
G02     201.6          25.3               11.5 +/-    1.88      22.3 +/-    1.88  0.070 / 0.120
G06     169.2          59.8                8.5 +/-    1.17       9.6 +/-    1.17  0.090 / 0.130
G17     31.3           53.2                6.5 +/-    0.62       7.9 +/-    0.62  0.170 / 0.330
G19     347.9          68.8                5.4 +/-    0.65       5.8 +/-    0.65  0.160 / 0.370
G24     307.1          32.3                6.1 +/-    1.29      10.2 +/-    1.29  0.050 / 0.040
G28     95.0           35.8                7.1 +/-    0.65      11.1 +/-    0.65  0.040 / 0.040
G30     158.0          10.4                9.1 +/-    2.77      25.3 +/-    2.77  0.040 / 0.050