PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-06:13:10
G10     266.7          38.9                6.2 +/-    1.04       9.1 +/-    1.04  0.040 / 0.030
G13     41.9           18.0                4.0 +/-    3.33       9.2 +/-    3.33  0.030 / 0.030
G15     58.7           48.0                6.1 +/-    0.87       7.9 +/-    0.87  0.060 / 0.070
G20     297.1          60.2                5.3 +/-    1.04       6.0 +/-    1.04  0.070 / 0.060
G21     7.3            72.1                6.0 +/-    0.95       6.3 +/-    0.95  0.290 / 0.230
G24     120.1          14.0                6.4 +/-    1.78      16.2 +/-    1.78  0.140 / 0.240
G27     319.7          17.0                5.3 +/-    2.82      12.6 +/-    2.82  0.340 / 0.370
G29     165.3          28.0                6.0 +/-    1.42      10.9 +/-    1.42  0.200 / 0.260