PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-14:42:50
G10     300.2          53.6                6.7 +/-    1.69       8.1 +/-    1.69  0.060 / 0.070
G15     45.5           24.0                5.4 +/-    2.29      10.8 +/-    2.29  0.070 / 0.080
G20     2.6            64.8                6.2 +/-    0.47       6.7 +/-    0.47  0.060 / 0.040
G21     99.2           72.7                8.1 +/-    0.75       8.4 +/-    0.75  0.070 / 0.050
G24     99.0           26.9                9.0 +/-    0.72      16.9 +/-    0.72  0.040 / 0.030
G27     300.2          34.8                5.8 +/-    0.97       9.2 +/-    0.97  0.040 / 0.030
G32     209.7          34.0               10.3 +/-    1.43      16.6 +/-    1.43  0.130 / 0.090