PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-19:42:20
G02     56.1           36.5                9.1 +/-    0.84      14.0 +/-    0.84  0.030 / 0.040
G05     62.5           63.7                9.6 +/-    0.64      10.6 +/-    0.64  0.030 / 0.050
G12     181.7          31.6               12.5 +/-    1.96      21.2 +/-    1.96  0.150 / 0.320
G13     129.7          13.6               13.4 +/-    1.72      34.4 +/-    1.72  0.180 / 0.350
G21     269.0          14.8               11.4 +/-    2.42      28.6 +/-    2.42  0.060 / 0.100
G25     238.8          53.5               10.2 +/-    0.93      12.4 +/-    0.93  0.070 / 0.110
G29     325.8          50.9                9.9 +/-    0.80      12.3 +/-    0.80  0.130 / 0.430