PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/14-07:12:50
G05     46.2           23.6                1.7 +/-    2.80       3.5 +/-    2.80  0.080 / 0.060
G13     86.9           35.3                5.6 +/-    1.42       8.9 +/-    1.42  0.070 / 0.070
G15     134.9          46.1                7.3 +/-    0.42       9.7 +/-    0.42  0.240 / 0.310
G20     240.7          30.2                5.0 +/-    1.52       8.8 +/-    1.52  0.150 / 0.350
G21     307.8          44.0                3.6 +/-    0.96       4.9 +/-    0.96  0.050 / 0.100
G25     202.3          17.5                5.1 +/-    5.30      12.0 +/-    5.30  0.060 / 0.090
G26     300.9          18.0                3.5 +/-    1.13       8.2 +/-    1.13  0.040 / 0.040
G29     137.2          76.3                4.9 +/-    0.72       5.0 +/-    0.72  0.040 / 0.040