PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-02:57:30
G02     57.5           33.8                6.0 +/-    1.95       9.7 +/-    1.95  0.160 / 0.290
G05     61.6           62.4                7.0 +/-    0.46       7.8 +/-    0.46  0.270 / 0.360
G12     187.0          38.3                9.6 +/-    1.86      14.4 +/-    1.86  0.050 / 0.080
G13     129.6          12.9                7.8 +/-    1.99      20.4 +/-    1.99  0.060 / 0.070
G15     164.5          10.6               -5.7 +/-   15.91     -15.6 +/-   15.91  0.040 / 0.080
G21     269.7          16.7                8.6 +/-    2.18      20.6 +/-    2.18  0.100 / 0.050
G25     240.0          54.0                8.6 +/-    2.93      10.3 +/-    2.93  0.230 / 0.340
G29     330.4          55.6                8.4 +/-    0.49       9.9 +/-    0.49  0.190 / 0.380