PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/19-13:42:50
G10     266.9          39.8                5.8 +/-    0.74       8.4 +/-    0.74  0.120 / 0.130
G13     41.6           17.4                4.4 +/-    2.31      10.2 +/-    2.31  0.120 / 0.150
G15     56.9           45.7                5.3 +/-    1.01       7.1 +/-    1.01  0.220 / 0.460
G16     278.9          12.9                4.5 +/-    2.14      11.7 +/-    2.14  0.170 / 0.460
G20     303.1          62.3                5.5 +/-    0.61       6.2 +/-    0.61  0.040 / 0.040
G21     5.9            71.7                5.4 +/-    0.55       5.6 +/-    0.55  0.050 / 0.040
G24     122.7          13.7                8.0 +/-    2.13      20.6 +/-    2.13  0.050 / 0.090
G27     319.0          18.4                5.0 +/-    2.53      11.5 +/-    2.53  0.060 / 0.090
G29     167.3          33.1                5.6 +/-    0.92       9.2 +/-    0.92  0.060 / 0.070