PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-18:57:50
G02     58.0           34.5                8.9 +/-    1.07      14.2 +/-    1.07  0.090 / 0.120
G05     58.6           61.9                9.8 +/-    0.54      10.9 +/-    0.54  0.060 / 0.110
G12     184.4          33.3               11.9 +/-    0.79      19.5 +/-    0.79  0.040 / 0.070
G13     126.7          14.9               13.6 +/-    1.86      34.0 +/-    1.86  0.050 / 0.070
G15     164.1          12.3               15.6 +/-    3.10      41.4 +/-    3.10  0.050 / 0.100
G21     271.3          16.4               13.2 +/-    1.20      31.7 +/-    1.20  0.050 / 0.100
G25     238.2          52.2               10.0 +/-    1.28      12.3 +/-    1.28  0.130 / 0.480
G29     328.8          54.4                8.8 +/-    1.63      10.6 +/-    1.63  0.200 / 0.410