PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/18-17:57:40
G10     267.4          39.9                9.9 +/-    1.71      14.5 +/-    1.71  0.090 / 0.150
G13     41.5           17.1                8.6 +/-    3.30      20.2 +/-    3.30  0.120 / 0.160
G15     58.2           47.6                8.2 +/-    0.69      10.6 +/-    0.69  0.150 / 0.460
G16     278.3          12.7                7.9 +/-    4.34      20.8 +/-    4.34  0.140 / 0.500
G20     301.0          61.4                9.0 +/-    0.72      10.1 +/-    0.72  0.050 / 0.040
G21     2.1            71.3               10.0 +/-    1.07      10.5 +/-    1.07  0.050 / 0.050
G24     122.4          14.0               11.4 +/-    2.69      29.0 +/-    2.69  0.110 / 0.330
G27     318.9          18.6                8.8 +/-    2.68      19.9 +/-    2.68  0.230 / 0.230
G29     167.4          32.4                8.5 +/-    1.43      14.2 +/-    1.43  0.150 / 0.310