PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-02:57:40
G02     57.5           33.8                5.5 +/-    0.60       9.0 +/-    0.60  0.080 / 0.080
G05     61.6           62.4                6.5 +/-    0.43       7.2 +/-    0.43  0.070 / 0.090
G12     187.0          38.3                8.3 +/-    1.63      12.4 +/-    1.63  0.120 / 0.420
G13     129.6          12.9                6.3 +/-    3.37      16.5 +/-    3.37  0.140 / 0.510
G15     164.5          10.6               -4.2 +/-   22.70     -11.5 +/-   22.70  0.050 / 0.060
G21     269.7          16.7                8.8 +/-    3.27      20.9 +/-    3.27  0.040 / 0.050
G25     240.0          54.0                8.2 +/-    0.80       9.9 +/-    0.80  0.080 / 0.500
G29     330.4          55.6                7.7 +/-    0.63       9.1 +/-    0.63  0.110 / 0.460