PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/28-18:57:50
G10     257.2          33.5               19.2 +/-    2.17      31.3 +/-    2.17  0.130 / 0.360
G13     47.2           24.2               13.6 +/-    0.47      27.1 +/-    0.47  0.050 / 0.050
G15     72.3           54.9               17.5 +/-    0.53      20.9 +/-    0.53  0.040 / 0.060
G16     288.0          15.2               11.8 +/-    3.25      29.2 +/-    3.25  0.180 / 0.590
G20     282.3          56.3               19.5 +/-    0.89      23.0 +/-    0.89  0.150 / 0.640
G21     343.2          64.5               16.2 +/-    0.75      17.7 +/-    0.75  0.060 / 0.170
G26     261.5          12.5               16.7 +/-    1.84      44.0 +/-    1.84  0.060 / 0.210
G27     322.1          10.6              -12.2 +/-   28.42     -33.6 +/-   28.42  0.040 / 0.050
G29     165.6          42.8               20.8 +/-    0.68      28.9 +/-    0.68  0.040 / 0.040