PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-18:57:40
G02     58.0           34.5                9.3 +/-    2.36      14.9 +/-    2.36  0.140 / 0.450
G05     58.6           61.9                9.8 +/-    0.90      11.0 +/-    0.90  0.260 / 0.460
G12     184.4          33.3               11.6 +/-    0.67      19.0 +/-    0.67  0.050 / 0.120
G13     126.7          14.9               12.6 +/-    2.27      31.3 +/-    2.27  0.050 / 0.120
G15     164.1          12.3               12.9 +/-    3.67      34.1 +/-    3.67  0.170 / 0.390
G21     271.3          16.4               12.2 +/-    2.07      29.2 +/-    2.07  0.160 / 0.400
G25     238.2          52.2               10.6 +/-    2.51      13.1 +/-    2.51  0.210 / 0.350
G29     328.8          54.4               10.3 +/-    0.68      12.4 +/-    0.68  0.220 / 0.240