PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/23-05:43:00
G02     52.6           37.9                3.7 +/-    1.26       5.6 +/-    1.26  0.040 / 0.060
G05     76.3           66.8                5.1 +/-    0.52       5.5 +/-    0.52  0.040 / 0.060
G12     188.1          44.6                7.3 +/-    0.95       9.9 +/-    0.95  0.020 / 0.030
G20     208.9          34.6                7.5 +/-    1.70      12.0 +/-    1.70  0.030 / 0.040
G21     263.5          11.7                2.1 +/-   11.52       5.7 +/-   11.52  0.110 / 0.160
G25     256.8          57.1                6.2 +/-    2.02       7.2 +/-    2.02  0.160 / 0.110
G29     322.0          45.5                4.6 +/-    0.59       6.1 +/-    0.59  0.270 / 0.370