PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-18:42:40
G01     75.0           32.9               11.7 +/-    0.88      19.4 +/-    0.88  0.040 / 0.050
G07     134.8          28.6               14.5 +/-    1.98      26.1 +/-    1.98  0.040 / 0.050
G11     55.7           33.0               11.1 +/-    1.79      18.3 +/-    1.79  0.070 / 0.140
G13     278.7          38.7               12.1 +/-    2.33      18.0 +/-    2.33  0.060 / 0.110
G15     305.2          14.7                9.0 +/-    1.82      22.6 +/-    1.82  0.050 / 0.110
G17     225.7          65.3               14.8 +/-    1.18      16.1 +/-    1.18  0.070 / 0.130
G18     50.7           19.0               11.1 +/-    1.96      25.1 +/-    1.96  0.060 / 0.110
G19     220.6          38.9               13.3 +/-    1.69      19.7 +/-    1.69  0.070 / 0.120
G28     2.2            61.2               12.9 +/-    0.76      14.5 +/-    0.76  0.080 / 0.140
G30     131.2          63.1               15.1 +/-    0.69      16.8 +/-    0.69  0.120 / 0.090