PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/23-10:42:30
G02     47.5           42.7                3.4 +/-    0.53       4.7 +/-    0.53  0.110 / 0.480
G05     96.7           70.1                2.8 +/-    0.72       3.0 +/-    0.72  0.120 / 0.420
G12     188.9          49.8                6.1 +/-    2.26       7.7 +/-    2.26  0.040 / 0.050
G21     261.1          11.1               -1.6 +/-   11.19      -4.4 +/-   11.19  0.040 / 0.060
G25     252.5          59.9                4.4 +/-    0.67       5.0 +/-    0.67  0.050 / 0.040
G29     320.0          42.9                3.5 +/-    1.54       4.9 +/-    1.54  0.050 / 0.050