PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/17-18:57:40
G02     56.5           35.7                9.1 +/-    1.50      14.2 +/-    1.50  0.050 / 0.090
G05     61.4           63.4               10.0 +/-    0.77      11.1 +/-    0.77  0.060 / 0.090
G12     184.7          35.2               11.2 +/-    0.82      17.7 +/-    0.82  0.100 / 0.300
G13     128.1          13.7               10.7 +/-    2.37      27.3 +/-    2.37  0.120 / 0.370
G15     165.0          10.9                2.4 +/-   27.65       6.6 +/-   27.65  0.120 / 0.290
G21     269.9          15.3               10.5 +/-    2.12      25.9 +/-    2.12  0.190 / 0.330
G25     241.0          53.4               10.2 +/-    3.30      12.4 +/-    3.30  0.140 / 0.350
G29     327.5          52.7               10.2 +/-    0.75      12.4 +/-    0.75  0.160 / 0.330