PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/07-21:12:40
G10     282.0          47.0                9.9 +/-    1.59      13.0 +/-    1.59  0.060 / 0.050
G15     50.2           39.8                8.7 +/-    1.04      12.7 +/-    1.04  0.050 / 0.050
G20     325.5          64.5                8.5 +/-    0.72       9.3 +/-    0.72  0.070 / 0.130
G21     41.3           77.0               10.6 +/-    0.42      10.8 +/-    0.42  0.070 / 0.140
G24     111.3          21.0               11.6 +/-    0.72      24.9 +/-    0.72  0.060 / 0.060
G27     311.9          27.4                9.3 +/-    1.21      17.1 +/-    1.21  0.050 / 0.070
G29     168.1          19.4               12.2 +/-    1.51      27.4 +/-    1.51  0.070 / 0.060
G32     206.1          20.4               13.5 +/-    1.69      29.4 +/-    1.69  0.070 / 0.070